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Swan Canning Estuarine Data Report

4th Quarter: June 2015 – May 2016

Looking after all our water needs

Technical Report Prepared by the Department of Water, Water Science Branch for the Department of Parks and Wildlife, Rivers and Estuaries Division

August 2016

Department of Water

168 St Georges Terrace

Perth Western Australia 6000

Telephone +61 8 6364 7600

Facsimile +61 8 6364 7601

www.water.wa.gov.au

© Government of Western Australia 2016

August 2016

This work is copyright. You may download, display, print and reproduce

this material in unaltered form only (retaining this notice) for your personal, non-

commercial use or use within your organisation. Apart from any use as permitted

under the Copyright Act 1968, all other rights are reserved. Requests and inquiries

concerning reproduction and rights should be addressed to the Department of Water.

Report details

This report was prepared by the Water Science Branch of the Department of Water for the Rivers and Estuaries Division of the Department of Parks and Wildlife, Government of Western Australia.

The report should be referenced as:

Department of Water 2016. Swan Canning Estuarine Data Report, June 2015 to May 2016. Report prepared by the Department of Water for the Department of Parks and Wildlife.

Acknowledgements

This project was funded by the Government of Western Australia through the Department of Parks and Wildlife and the Department of Water.

For more information about this report, contact

Frances Miller (Environmental Officer),

Water Science Branch.

Swan Canning Estuarine Data Report June 2015 – May 2016

3 Department of Water

Contents 1 Preface ................................................................................................................ 8

2 Introduction ....................................................................................................... 14

3 Key Observations from 2015-16 ........................................................................ 15

4 Total Nitrogen .................................................................................................... 26

5 Ammonium Nitrogen ......................................................................................... 30

6 Total Oxidised Nitrogen ..................................................................................... 34

7 Dissolved Organic Nitrogen............................................................................... 38

8 Total Phosphorus .............................................................................................. 42

9 Soluble Reactive Phosphorus ........................................................................... 46

10 Silica ................................................................................................................. 50

11 Dissolved Organic Carbon ................................................................................ 54

12 Total Suspended Solids .................................................................................... 58

13 Alkalinity ............................................................................................................ 60

14 Chlorophyll a ..................................................................................................... 62

15 Dissolved Oxygen ............................................................................................. 66

16 Salinity .............................................................................................................. 70

17 Temperature...................................................................................................... 74

18 pH ..................................................................................................................... 78

19 Secchi Depth ..................................................................................................... 82

20 Phytoplankton ................................................................................................... 86

Tables

Table 1 Information and coordinates of sites in the Swan and Canning Estuary where data is collected for this report. ............................................................................ 10

Table 2 Swan Estuary sampling regimes. ......................................................................... 12

Table 3 Canning Estuary sampling regimes. .................................................................... 13

Table 4 Details of exceeded phytoplankton trigger levels in the Swan Estuary................ 20

Table 5 Details of exceeded phytoplankton trigger levels in the Canning Estuary. .......... 22

Table 6 Swan Total Nitrogen (TN) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015/2016. ...................................................... 27

Table 7 Canning Total Nitrogen (TN) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .......................................................... 29

Table 8 Swan Ammonium Nitrogen (NH3-N) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 31

Table 9 Canning Ammonium Nitrogen (NH3-N) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 33

Table 10 Swan Total Oxidised Nitrogen (NOx-N) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 35



Table 11 Canning Total Oxidised Nitrogen (NOx-N) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 37

Table 12 Swan Dissolved Organic Nitrogen (DOrgN) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 39

Table 13 Canning Dissolved Organic Nitrogen (DOrgN) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ................................... 41

Table 14 Swan Total Phosphorus (TP) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .......................................................... 43

Table 15 Canning Total Phosphorus (TP) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .......................................................... 45

Table 16 Swan Soluble Reactive Phosphorus (SRP) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 47

Table 17 Canning Soluble Reactive Phosphorus (SRP) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ................................... 49

Table 18 Swan Silica (soluble reactive as Silicon (SiO2-Si)) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .................... 51

Table 19 Canning Silica (soluble reactive as Silicon (SiO2-Si)) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .................... 53

Table 20 Swan Dissolved Organic Carbon (DOC) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 55

Table 21 Canning Dissolved Organic Carbon (DOC) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 57

Table 22 Swan Total Suspended Solids (TSS) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 59

Table 23 Swan Alkalinity (tot) (CaCO3) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .......................................................... 61

Table 24 Swan Chlorophyll a (Chl a) (µg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .......................................................... 63

Table 25 Canning Chlorophyll a (Chl a) (µg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .......................................................... 65

Table 26 Swan Dissolved Oxygen (DO) (mg L-1) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 68

Table 27 Canning Dissolved Oxygen (DO) (mg L-1) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ......................................... 69

Table 28 Swan Salinity (ppt) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ........................................................................... 72

Table 29 Canning Salinity (ppt) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ........................................................................... 73

Table 30 Swan Temperature (°C) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .......................................................... 76

Table 31 Canning Temperature (°C) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .......................................................... 77

Table 32 Swan pH (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ............................................................................................... 80

Table 33 Canning pH (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .................................................................................. 81

Table 34 Swan Secchi Disc depth (m) monthly sample numbers (n), minimum, maximum and median values for 2015-16. ........................................................................... 83

Table 35 Canning Secchi Disc depth (m) monthly sample numbers (n), minimum, maximum and median values for 2015-16. .......................................................... 85



Figures

Figure 1 Map of Swan and Canning routine estuarine monitoring sites within the ecological management zones. ............................................................................................. 11

Figure 2 Average monthly rainfall (mm) recorded at Perth Airport for 2015-16 compared to the 40 year averages (1975-2015). ...................................................................... 15

Figure 3 Daily rainfall (mm) recorded at Perth Airport from 01/06/2015 to 31/05/2016. .... 16

Figure 4 Swan River estuary integrated Phytoplankton group densities June 2015-May 2016. ..................................................................................................................... 18

Figure 5 Swan River estuary integrated Phytoplankton group densities June 2014-May 2015. ..................................................................................................................... 19

Figure 6 Swan River Profile for 21 March 2016. ................................................................ 21

Figure 7 Canning River estuary integrated phytoplankton group densities June 2015 - May 2016. ..................................................................................................................... 24

Figure 8 Canning River estuary integrated phytoplankton group densities June 2014 - May 2015. ..................................................................................................................... 25

Figure 9 2015-16 Total Nitrogen (TN) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) TN data, in the Lower Swan Canning, Middle and Upper Swan Estuary. .................................................................................... 26

Figure 10 2015-16 Total Nitrogen (TN) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) TN data, in the Canning Estuary and Lower Canning River. ...................................................................................................... 28

Figure 11 2015-16 Ammonium Nitrogen (NH3-N) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) NH3-N data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ......................................................................... 30

Figure 12 2015-16 Ammonium Nitrogen (NH3-N) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) NH3-N data, in the Canning Estuary and Lower Canning River. ........................................................................................... 32

Figure 13 2015-16 Total Oxidised Nitrogen (NOx-N) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) NOx-N data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ......................................................... 34

Figure 14 2015-16 Total Oxidised Nitrogen (NOx-N) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) NOx-N data, in the Canning Estuary and Lower Canning River. ........................................................................................... 36

Figure 15 2015-16 Dissolved Organic Nitrogen (DOrgN) (mg L-1) in surface and bottom water, over background (July 2009-May2014) DOrgN data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ......................................................... 38

Figure 16 2015-16 Dissolved Organic Nitrogen (DOrgN) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) DOrgN data, in the Canning Estuary and Lower Canning River........................................................................ 40

Figure 17 2015-16 Total Phosphorus (TP) (mg L-1) in surface and bottom water, over background (June 2008-May 2013) TP data, in the Lower Swan Canning, Middle and Upper Swan Estuary. .................................................................................... 42

Figure 18 2015-16 Total Phosphorus (TP) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) TP data, in the Canning Estuary and Lower Canning River. ...................................................................................................... 44

Figure 19 2015-16 Soluble Reactive Phosphorus (SRP) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) SRP data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ......................................................... 46

Figure 20 2015-16 Soluble Reactive Phosphorus (SRP) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) SRP data, in the Canning Estuary and Lower Canning River. .................................................................................... 48

Figure 21 2015-16 Silica (soluble reactive as Silicon (SiO2-Si)) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) SiO2-Si data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ............................................... 50



Figure 22 2015-16 Silica (soluble reactive as Silicon (SiO2-Si)) (mg L-1) in surface water, over background (June 2010-May 2015) SiO2-Si data, in the Canning Estuary and Lower Canning River. .................................................................................... 52

Figure 23 2015-16 Dissolved Organic Carbon (DOC) (mg L-1) in surface water, over background (June 2010-May 2015) DOC data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ......................................................................... 54

Figure 24 2015-16 Dissolved Organic Carbon (DOC) (mg L-1) in surface water, over background (June 2010-May 2015) DOC data, in the Canning Estuary and Lower Canning River. ...................................................................................................... 56

Figure 25 2015-16 Total Suspended Solids (TSS) (mg L-1) in surface water, over background (June 2010-May 2015) TSS data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ......................................................................... 58

Figure 26 2015-16 Alkalinity (tot) (CaCO3) (mg L-1) in surface water, over background (June 2010-May 2015) Alkalinity data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ...................................................................................................... 60

Figure 27 2015-16 Chlorophyll a (Chl a) (µg L-1) in surface and integrated water, over background (June 2010-May 2015) Chl a data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ......................................................................... 62

Figure 28 2015-16 Chlorophyll a (Chl a) (µg L-1) in surface and integrated water, over background (June 2010-May 2015) Chl a data, in the Canning Estuary and Lower Canning River. ...................................................................................................... 64

Figure 29 2015-16 Dissolved Oxygen (DO) (mg L-1) (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ......................................................................... 66

Figure 30 2015-16 Dissolved Oxygen (DO) (mg L-1) (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Swan River. ............... 67

Figure 31 2015-16 Dissolved Oxygen (DO) (mg L-1) (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Canning Estuary and Lower Canning River. ........................................................................................... 67

Figure 32 2015-16 Salinity (ppt) (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ........................................................................................... 70

Figure 33 2015-16 Salinity (ppt) (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Swan River. ..................................... 71

Figure 34 2015-16 Salinity (ppt) (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Canning Estuary and Lower Canning River. .................................................................................................................... 71

Figure 35 2015-16 Temperature (°C) (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ........................................................................................... 74

Figure 36 2015-16 Temperature (°C) (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Swan River. ..................................... 75

Figure 37 2015-16 Temperature (°C) (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Canning Estuary and Lower Canning River. .................................................................................................................... 75

Figure 38 2015-16 pH (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Lower Swan Canning, Middle and Upper Swan Estuary. ................................................................................................................ 78

Figure 39 2015-16 pH (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Swan River. ........................................................ 79

Figure 40 2015-16 pH (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Canning Estuary and Lower Canning River. ............ 79

Figure 41 2015-16 Secchi Disc depth (m) over background (June 2010-May 2015) Secchi Disc depth data, in the Lower Swan Canning, Middle, Upper Swan Estuary and the Swan River. .................................................................................................... 82



Figure 42 2015-16 Secchi Disc depth (m) over background (June 2010-May 2015) Secchi Disc depth data, in the Canning Estuary and Lower Canning River. ................... 84

Figure 43 Swan June 2010-May 2011 integrated Phytoplankton (cells/mL). ....................... 86



Figure 46 Swan June 2013-May2014 integrated Phytoplankton (cells/mL). ........................ 89



Figure 49 Canning June 2010-May 2011 integrated Phytoplankton (cells/mL). .................. 92








1 Preface The Swan Canning Environmental Monitoring and Reporting project is a long term monitoring project consisting of regular sampling of the Swan and Canning Rivers and the Swan Canning catchment, enabling regular water quality reporting and annual reporting on estuarine and catchment compliance. The project was designed and implemented in 1994 by the Swan River Trust and Department of Water (then Water and Rivers Commission) as part of the Swan Canning Clean-up Program Action Plan. The project is currently delivered through the Department of Parks and Wildlife in partnership with the Water Science Branch of the Department of Water.

The estuarine water sampling conducted for this monitoring project falls under several Department of Water WIN data management projects. These are:

SG-E-SWANEST – Swan River Estuary Sampling. This project consists of weekly sampling at twenty-one fixed sites (12 grab sample sites) from Blackwall Reach upstream to Power Line crossing in West Swan. This sampling is generally conducted every Monday, split into the lower Swan run, using the Department of Parks and Wildlife boat Kwilana, and the upper Swan run using the Department of Parks and Wildlife boat Kepa. For the lower Swan run sites, sampling began in October 1994 but was somewhat intermittent until 1999. For the upper Swan sites, sampling began November 2006.

SG-E-CANEST – Canning River Estuary Sampling. This project consists of weekly sampling at eight fixed sites from South Canning Bridge upstream to Ellison Drive in Langford. This sampling is generally conducted every Tuesday and is split into two runs, conducted simultaneously using Department of Parks and Wildlife boats the Trekker and the Kepa. Sampling began January 1995 but was somewhat intermittent until 1999.

SG-E-UPPERSWAN – Upper Swan River Estuary Sampling. This project was closed and the sites were added to the SG-E-SWANEST project from July 2010.

SG-E-SWANCOMP – Swan River Compliance Sampling. This project consists of weekly sampling at an additional site from the first week of January to last week of May. The weekly compliance site is located at a randomly selected sampling point (site code prefix of SWL) on a grid of Melville waters. Two randomly selected sites on the lower Swan run and RIV on the Canning run are also sampled for the Swan compliance program (Table 2 and Table 3). The compliance sampling is incorporated into the regular weekly SWANEST and CANEST sampling runs. Sampling began in 1999. A report of the compliance data is produced annually at the end of June.



Some important estuarine sampling changes are listed below:

On the 17/08/2015 sampling at HEA was expanded to include grab samples

(surface and bottom), ID samples and phytoplankton samples.

In November 2014 the ecological management zones within the Swan Canning River Estuary were re-classified to align this report with others published by the Department of Parks and Wildlife (formally SRT) and DOW. Please refer to Page 14 of this report for current ecological zone classifications. It should therefore be noted that the monitoring sites within each zone have changed with respect to quarterly data reports published before November 2014.

On 14/10/14 the CANEST site order was amended due to access issues upstream of Greenfields Bridge. From 14/10/14 sites SCB2, SAL, KEN and BAC were sampled from the Kepa and sites RIV, CASMID, NIC and ELL were sampled from the Trekker.

CAS site sampled 23/1/1995 to 23/6/1998, then re-added to CANEST on 1/11/2005. Location changed to mid-channel (CASMID) 19/01/2010. Location changed back to CAS from 27/11/2012. Location changed back to CASMID from 19/03/2013.

CANEST sampling was split into two runs on the 19/03/13. The lower Canning sites (SCB2, SAL, RIV and CASMID) were sampled from the Trekker and the upper Canning sites (KEN, BAC, NIC and ELL) were sampled from the Trailcraft.

Sampling at SCB moved 100 m west to SCB2 on 29/01/2013.

Ceased profiling SCS01, LLH and WBRP on the SWAN. Last profiled on 28/05/2012.

New site South Canning Bridge (SCB) added to CANEST project July 2010.

Grab samples changed from weekly to fortnightly in July 2010.

Changed from bottom grab samples to integrated samples for chlorophyll on 10/12/2001 for SWANEST and 25/10/2005 for CANEST.

HEA site added to SWANEST 9/10/2000.

Silica and Dissolved organic nitrogen sampled from 14/7/2008 for SWANEST and CANEST and from 8/9/2008 for UPPERSWAN.

Changed analytical laboratory from SGS to NMI from 5/9/2005 for chlorophyll and from 19/9/2005 for all other parameters.



Table 1 Information and coordinates of sites in the Swan and Canning Estuary where data is collected for this report.

Project Site Site Code Easting Northing Expected Depth (m)

SW

AN

ES

T

Blackwall Reach BLA 385081 6456807 16 - 17

Armstrong Spit ARM 387504 6458161 12 - 13

Heathcote HEA 389983 6459538 6 – 8

Narrows Bridge NAR 391215 6463014 5 – 6

Nile Street NIL 394660 6464027 2 – 3

St John’s Hospital STJ 397308 6464439 5 – 6

Maylands Pool MAY 396801 6465716 3 – 4

Ron Courtney Island RON 399802 6467786 4 – 5

Kingsley KIN 401768 6468783 5 – 6

Success Hill SUC 401585 6470349 4 – 5

West Midland Pool WMP 404439 6471549 4 – 4.8

Middle Swan Bridge MSB 406263 6474166 2 – 3

Jane Brook confluence JBC 405656 6474493 2 – 2.5

Power line crossing POL 404979 6475053 1.5 – 2.5

CA

NE

ST

South Canning Bridge SCB2 391698 6457081 3.5 – 5

Salter Point SAL 393509 6455593 ~2

Riverton Bridge RIV 396239 6455988 ~1.5

Castledare CASMID 397599 6456555 2 – 2.5

Kent Street Weir KEN 398104 6456676 2 – 3

Bacon Street BAC 398652 6456567 5 – 6

Nicholson Rd Bridge NIC 400108 6455782 3 – 4

Ellison Parade ELL 401012 6455148 2 – 3

Department of Water 11

Figure 1 Map of Swan and Canning routine estuarine monitoring sites within the ecological management zones.



Table 2 Swan Estuary sampling regimes.

Project Site

Code

Frequency

Weekly or

Fortnightly

TN TP NOx NH3 SRP DOrgN SiO2 DOC TSS Alk Chl YSI

profile

in situ

Field

obs and

secchi

Phyto-

plankton

S B S B S B S B S B S B S B S S S S ID ID NET

SW

AN

ES

T

BLA W/F

ARM W/F

HEA W/F

NAR W/F

NIL W/F #

#

#

STJ W/F #

#

#

MAY W/F #

#

#

RON W/F #

#

#

KIN W/F # #

#

SUC W/F # #

#

WMP W/F

MSB W/F

JBC W

POL W

# Surface TN, TP and Chlorophyll are sampled weekly at two of these sites (randomly selected) from January to May for compliance calculations

(SWANCOMP) for Department of Parks and Wildlife estuarine KPI's.

S = surface

B = bottom

ID = integrated

YSI profile includes dissolved oxygen, temperature, conductivity and pH.



Table 3 Canning Estuary sampling regimes.

Project Site Code

Frequency

Weekly or

Fortnightly

TN TP NOx NH3 SRP DOrgN SiO2 DOC TSS Alk Chl YSI

profile

in situ

Field

obs and

secchi

Phyto-

plankton

S B S B S B S B S B S B S B S S S S ID ID NET

CA

NE

ST

SCB2 W/F

SAL W/F

RIV W/F # #

#

CASMID W/F

KEN W/F

BAC W/F

NIC W/F

ELL W/F

# Surface TN, TP and Chlorophyll sampled weekly at RIV during January to May for compliance calculations (SWANCOMP) for Department of Parks and

Wildlife estuarine KPI's.

S = surface

B = bottom

ID = integrated

YSI profile includes dissolved oxygen, temperature, conductivity and pH.



2 Introduction This Swan Canning estuarine quarterly data report presents background and current quarter data collected from a total of twenty two sites from the Swan and Canning Estuarine Environmental Monitoring program. Data is presented in graphical and tabular form for thirteen key analytes; total nitrogen, ammonium nitrogen, total oxidised nitrogen, dissolved organic nitrogen, total phosphorus, soluble reactive phosphorus, silica, dissolved organic carbon, total suspended solids, alkalinity, chlorophyll a, secchi depth, and phytoplankton, and four in situ profile data parameters; dissolved oxygen, salinity, temperature and pH. Data (except phytoplankton data) from the twenty two sites is grouped into six regions as follows;

Lower Swan Canning Estuary: BLA, ARM, HEA and NAR

Middle Swan Estuary: NIL, STJ, MAY and RON

Upper Swan Estuary: KIN, SUC, WMP and MSB

Swan River: JBC and POL

Canning Estuary: SCB2, SAL, RIV and CASMID

Lower Canning River: KEN, BAC, NIC and ELL

Graphical presentation of each analyte (except phytoplankton) and in situ parameter includes background monthly median, 10th and 90th percentile data overlain by the monthly medians of the current year. Estuarine data is presented over a June to May year so that the usual summer/autumn period of interest is kept together in one report and is still current for the final 4th quarter report. Quarterly reports correspond to 1st quarter (Jun-Aug), 2nd quarter (Sep-Nov), 3rd quarter (Dec-Feb) and 4th quarter (Mar-May) with the data from each quarterly report adding to the “current year” data already presented. This data report is the fourth quarterly data report for 2015-16 and presents data from June 2015 to May 2016 over background data generally from June 2010 to May 2015. Dates of background data vary for some analytes due to sampling changes (see Preface). All data recorded below the laboratory limit of reporting was halved in order to be presented graphically. The current year data (2015-16) is also presented in tables showing the number of samples collected for each analyte (n), the monthly minimum and maximum values and the monthly median for the current quarter. Phytoplankton data is presented as yearly contour plots for total phytoplankton, diatoms, dinoflagellates and chlorophytes for the Swan and Canning for 2010-11 to 2015-16. Weekly phytoplankton data from integrated water column samples is presented with no temporal or spatial grouping of the data. On 17 August 2015 phytoplankton sampling commenced at HEA in the lower Swan Canning Estuary. Data presented and discussed in the section titled, Key Observations from 2015-16, compares current year data (2015-16) to data from the previous year (2014-15).



3 Key Observations from 2015-16 Total rainfall for the 2015-16 reporting period was 578 mm (Bureau of Metrology). This is below the average annual rainfall of 714 mm recorded at Perth Airport over the past 40 years (Bureau of Metrology). The seasonal monthly rainfall pattern was similar to the historical patterns of high rainfall during winter months and low rainfall during summer months (Figure 2). Except during December, February, March and April, the average monthly rainfall during the 2015-16 reporting period was lower than the 40 year monthly average. Daily rainfall for this reporting period (01/06/2015 to 31/05/2016) is shown in Figure 3.

Figure 2 Average monthly rainfall (mm) recorded at Perth Airport for 2015-16 compared to the 40

year averages (1975-2015).

Swan River Phytoplankton

Overall, total phytoplankton activity in the Swan River and Estuary for 2015-16 (Figure 4) was higher compared to last year (2014-15) (Figure 5). This year (2015-16) peak cell densities occurred during (September to November) and from late summer (February) through most of autumn (March to May). This differs from last year (Figure 5) where peak cell densities occurred during winter (July to August) and mid-summer to early autumn (January to March). In 2014-15 peak cell densities were principally located in the upper estuary. This year the highest densities were again seen in the upper Swan Canning Estuary, but with elevated levels seen more frequently in the middle Swan Estuary.

0

20

40

60

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120

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180

Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May

Month

ly A

vera

ge R

ain

fall

(mm

)

2015-16 40 year Average



Figure 3 Daily rainfall (mm) recorded at Perth Airport from 01/06/2015 to 31/05/2016.

In general, diatoms were present in lower abundances than 2014-15 (Figure 4 and Figure 5). This year (2015-16) saw a wider variety of species compared to last year (2014-15). This year through winter (June to August) the dominant species was Cylindrotheca closterium. High diatom densities in late August and early September reflected a bloom of the small (~5µm) diatom Chaetoceros tenuissimus. On 7 September 2015 Chaetoceros tenuissimus reached a peak density of >200,000 cells/mL at WMP in the upper Swan Estuary. It was dominant throughout most of the system. At the beginning of October 2015, diatom densities dropped off rapidly (Figure 4) and stayed uncharacteristically low throughout most of the middle and upper Swan Estuary from the beginning of October to late November 2015. This period of low diatom activity corresponded to a time of increased chlorophyte (small flagellated prasinophytes) densities. During November Chaetoceros spp. were dominant, remaining at moderate densities in the lower Swan Canning Estuary. Due to movement of the salt wedge upstream through December, diatom dominance changed to Skeletonema spp. As diatom densities reached a mid-summer peak in the upper Swan Estuary, dominance switched to Cyclotella spp. Dinoflagellate activity increased this year (Figure 4) compared to 2014-15 (Figure 5). The dinoflagellate Hetercapsa horiguchii was detected at MSB on 8 February 2016, at MSB and WMP (peak density of 183,820 cells/mL) on 15 February and at POL, MSB and WMP on 29 February (Figure 4). From late April and throughout May, dinoflagellates Prorocentrum dentatum and Procentrum minimum occurred in moderate-to-high densities. The dinoflagellate activity resulted in water discolouration in the lower Swan Canning Estuary.

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ily R

ain

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(mm

)



In late February, increased summer water temperatures contributed to the development of a cyanobacteria bloom in the upper Swan Estuary, replacing the Hetercapsa horiguchii bloom. The cyanobacteria bloom was of mixed genera, including Oscillatoria spp., Pseudanabaena spp. and Anabaenopsis arnoldii. No known toxigenic species were recorded however the high bio-volumes exceeded the NHMRC red alert level 2 guideline (>10 mm3/L total cyanobacterial biovolume) and therefore the Parks and Wildlife notification response trigger level. Table 4 shows details of exceeded phytoplankton trigger levels in the Swan River Estuary during the 2015-16 period. Between Sunday 20 March and Tuesday 22 March 2016 a fish death event (estimated at 200 Black Bream) was recorded along a 5 km stretch of the upper Swan Estuary from Maali Bridge to All Saints Church. The hypoxic and near anoxic dissolved oxygen levels associated with the bloom were recorded during the routine upper Swan sampling run that occurred on the 21 March 2016, can be seen in the contour plots for salinity, oxygen and water temperature shown in Figure 6. The cyanobacteria event lasted for 11 weeks (Table 4). The Department of Parks and Wildlife determined that the fish deaths were most likely caused by asphyxiation due to the cyanobacteria bloom creating hypoxic and anoxic conditions. In late March a rainfall event (Figure 3) pushed the bloom downstream, after which it dissipated. The modified physical conditions resulting from the rainfall led to another bloom of the dinoflagellate Heterocapsa horiguchii in the upper Swan Estuary in the Guildford/Midland area. Of the observed Harmful Algal Bloom events that triggered a Notification response (Table 4), the August-October 2015 Dinophysis acuminta event and the Alexandrium spp. event in spring 2015 are notable. Potentially neurotoxic Alexandrium spp. has only rarely been detected in the system before and the series of observations across a period of nine weeks was highly unusual. Dinophysis acuminata, a producer of diarrhetic shellfish toxins, is commonly present at low densities and tends to bloom in September-October; somewhat later than the 2015 observations. Chlorophyte activity throughout the year was once again predominantly Prasinophyte spp. This year, Chlorophytes were present throughout the whole year with densities peaking during spring (November). Chlorophyte activity occurred throughout the River and Estuary.



Figure 4 Swan River estuary integrated Phytoplankton group densities June 2015-May 2016.



Figure 5 Swan River estuary integrated Phytoplankton group densities June 2014-May 2015.



Table 4 Details of exceeded phytoplankton trigger levels in the Swan Estuary.

Site(s) Harmful (H)/Nuisance (N) Species (max cell count2)

Status/Species Trigger Level (cells/mL)*

Duration of Event (Dates Sampled)

ARM-NIL

Dinophysis acuminata (H) 22 cells/mL

Notification1 (10) 6 weeks

31/08/2015 – 5/10/2015

SUC-MSB

Chaetoceros tenuissimus (N)

212,504 cells/mL

Investigation (100,000) 2 weeks

31/08/2015 – 7/09/2015

ARM-STJ

Alexandrium spp. (H)

1 cell/mL Notification (detect)

9 weeks

29/09/2015 – 23/11/2015

SUC-WMP

Prasinophytes (N)

701,344 cells/mL Investigation (100,000)

3 weeks

2/11/2015 – 16/11/2015

MSB-POL

Heterocapsa spp. (N) 194,728 cells/mL

Notification (discolouration)

4 weeks

8/02/2016 – 29/02/2016

KIN-POL

Cyanobacteria (H) 28.87 mm3/L

Notification (≥10 mm3/L) 11 weeks

7/02/2016 – 18/04/2016

SUC-WMP

Heterocapsa spp. (N) 57,368 cells/mL


1 week

26/04/2016

NIL Dinophysis acuminata (H) 5 cells/mL

Investigation1 (5) 1 week

2/05/2016

SUC-MSB

Mixed diatoms 5-10 µm (N) 146,046 cells/mL


4 weeks

2/05/2016 – 23/05/2016

NIL-MAY

Prorocentrum minimum

(H) 12,271 cells/mL


9/05/2016 – 7/06/2016

* Species trigger values are set by the Department of Parks and Wildlife in consultation with the Departments of Water and Health and are reviewed annually. The trigger values are intended to inform management actions for the Swan Canning river system. Phytoplankton cell densities are determined from depth-integrated samples.

1 Investigation and notification trigger values for Dinophysis acuminata were reduced from 10 and 20 to 5 and 10 cells/mL respectively in September 2014.

2 Maximum cell counts are the maximum density observed during the bloom.

Swan River Total Nitrogen (TN) and Total Phosphorus (TP)

The effects of the cyanobacteria bloom that occurred in the middle and upper Swan Estuary regions from February to May can be seen in the water chemistry. Median monthly nitrogen and phosphorous levels were above the monthly background 90th percentile boundary as shown in the TN (Figure 9), NH3-N (Figure 11), NOx-N (Figure 13), DON (Figure 15), TP (Figure 17) and SRP (Figure 19) data. Monthly median pH levels were also influenced by the cyanobacteria bloom with monthly median levels above the 90th percentile (Figure 39) in February to May in the Swan River region with median surface and bottom results of >8.5 in February (Table 32).



Median pH in the middle Swan surface water and the upper Swan surface and bottom water (Figure 38) was also above the 90th percentile. In February, surface and bottom pH levels reached a median of 8.6 at MSB. This elevated pH is not reflected in the data presented in Figure 38 due to the other three sites in the upper Swan estuary region remaining normal. The influence of the cyanobacteria bloom on dissolved oxygen was evident in both the surface and bottom water in the Swan River region for the duration of the bloom from February to May. Although the median monthly dissolved oxygen values followed the same trend as the monthly background data, the surface values were close to the 90th percentile boundary in February, April and May and the 10th percentile boundary in March. The same pattern is shown in the bottom water data although the values are outside of the 90th and 10th percentile boundaries (Figure 30). Throughout this reporting period (2015-16) monthly median SRP levels were higher than the monthly background medians with the majority of monthly median figures being above the 90th percentile boundary for the lower, middle and upper Swan regions (Figure 19). SRP is not measured in the Swan River region.

Figure 6 Swan River Profile for 21 March 2016.

Canning River Phytoplankton

Kent St Weir was opened on 28 August 2015 and closed on 1 October 2015. The weir was open for a period of five weeks. Last year (2014-15) the weir was open for 11 weeks.

-15

-10

-5

0

0 10 20 30Salinity (ppt)

-15

-10

-5

0

0 5 10 15Dissolved Oxygen (mg/L)

-15

-10

-5

0

0 50 100 150 200Dissolved Oxygen (%Sat'n)

0 5 10 15 20 25 30 35 40 45 50

-15

-10

-5

0

10 15 20 25 30Temperature (°C)

Swan River Estuary - Physical-chemical Profile - 21st March 2016

Distance from entrance (km)

De

pth

(m

)

*Data for sites FP1 (Harbour entrance) and FP7 (Fremantle Bridge) are supplied courtesy of the Fremantle Port Authority

FP1* FP7* BLA ARM HEA NAR NIL STJ MAY RON KIN SUC MEA MUL WMP CAV REG MSBJBC POL



During the 2015-16 period, phytoplankton response values were triggered at several sites in the Canning Estuary. Details of where and when these trigger values were exceeded are presented in Table 5. Overall, total phytoplankton activity in the Canning River appeared higher for 2015-16 (Figure 7) compared to 2014-15 (Figure 8) with a noticeable increase through the July-September period. Increased total phytoplankton densities were also experienced in the upper sites of the Canning Estuary (Riverton and Castledare) from January to late March 2016 (Figures 6 and 7). Diatom densities increased during summer (December to February) and early autumn (March and April), with the highest activity occurring at RIV and CASMID. The dominant species during summer were Chaetoceros spp. and Leptocylindrus minimus with Skeletonoma costatum and Thalassiosira spp. appearing in autumn (Figure 7, Table 5).

Table 5 Details of exceeded phytoplankton trigger levels in the Canning Estuary.

Site(s) Harmful (H)/Nuisance (N) Species (max cell count2)

Status/Species Trigger Level (cells/mL)*#

Duration of Event (Dates Sampled)

SCB2-SAL

Dinophysis acuminata (H)

48 cells/mL Notification1 (10)

1 week

8/09/2015

SCB2-SAL

Alexandrium sp. (H)


3 weeks

15/09/2015 – 30/09/2015

SCB2-SAL

Alexandrium sp. (H)


1 weeks

10/11/2015

CASMID Mixed diatoms <5 µm (N) 149,051 cells/mL

Investigation (100,000)

1 week

19/01/2016

RIV Mixed diatoms 5-10 µm (N) 63,957 cells/mL

Investigation (50,000) 1 week

16/02/2016

KEN-BAC

Toxigenic Cyanobacteria (H) 12.36 mm3/L

Notification (≥4 mm3/L) 2 Weeks

9/03/2016 – 15/03/2016

SCB2 Dinophysis acuminata (H) 6 cells/mL

Investigation1 (5) 1 week

3/05/2016

SAL Prorocentrum dentatum (N) 36,277 cells/mL

Notification (20,000) 3 weeks

3/05/2016 – 17/05/2016

SCB2-RIV

Prorocentrum minimum (H) 15,352 cells/mL


21/06/2016 – 05/07/2016

SCB2-RIV

Dinophysis acuminata (H) 16 cells/mL

Notification1 (5,000) 4 weeks

21/06/2016 – 12/07/2016

* Species trigger values are set by the Swan River Trust in consultation with the Departments of Water and Health and are reviewed annually. The trigger values are intended to inform management actions for the Swan Canning river system. Phytoplankton cell densities are determined from depth-integrated samples.

1 Investigation and notification trigger values for Dinophysis acuminata were reduced from 10 and 20 to 5 and 10 cells/mL respectively in September 2014.

2 Maximum cell counts are the maximum density observed during a bloom.



Dinoflagellate activity increased from mid-spring to mid-summer (October to January) and again in autumn (April and May) (Figure 7). The dominant dinoflagellate was Prorocentrum minimum. Highest activity was recorded at RIV and CASMID. At the end of December Oxyrrhis spp. activity increased at RIV and in January Gymnodinium spp. activity increased at CASMID. The dominant species recorded in autumn was Prorocentrum minimum. On 10/11/2015, Alexandrium spp. was recorded at detection levels in the Canning Estuary at SCB2 and SAL. Alexandrium spp. is a known neurotoxin producing species (Table 5). Chlorophyte activity was observed throughout the year, with peak activity occurring from September to March (Figure 7). The dominant species above and below Kent Street Weir, were Prasinophyte spp. with some Tetraselemis spp. activity below the weir in August and September. A short-lived bloom of toxigenic cyanobacteria occurred in the Canning River in March at the beginning of autumn (Table 5). The bloom resulted in a media release from the Department of Health and the erection of warning signs at impacted areas. No fish death events were reported relating to the Canning River for the period of June 2015 to May 2016.

Canning River Total Nitrogen (TN) and Total Phosphorus (TP)

Monthly median total nitrogen concentrations for 2015-16 followed similar trends to the median monthly background data (Figure 10). All monthly median total nitrogen concentrations fell within the 10th and 90th percentile boundaries. Monthly median total nitrogen concentrations peaked in January and February in the Canning Estuary surface and bottom water respectively, and in August in the lower Canning River surface and bottom water. Monthly median total phosphorus concentrations for 2015-16 followed similar trends to the median monthly background data (Figure 18). All monthly median total phosphorus concentrations fell within the 10th and 90th percentile boundaries (Figure 18) except for May in the lower Caning River region where the monthly median was below the 10th percentile boundary.



Figure 7 Canning River estuary integrated phytoplankton group densities June 2015 - May 2016.



Figure 8 Canning River estuary integrated phytoplankton group densities June 2014 - May 2015.



4 Total Nitrogen

Figure 9 2015-16 Total Nitrogen (TN) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) TN data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(e) TN Upper Swan Estuary (Surface)


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

(b) TN Lower Swan Canning Estuary (Bottom)


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

Monthly background 10th & 90th percentile

Monthly background Median

15/16 monthly Median

(c) TN Middle Swan Estuary (Surface)


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

(d) TN Middle Swan Estuary (Bottom)


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

(a) TN Lower Swan Canning Estuary (Surface)


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5




(f) TN Upper Swan Estuary (Bottom)


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5



Table 6 Swan Total Nitrogen (TN) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015/2016.


TN Lower Swan Canning Estuary (Surface)

n 9 6 7 8 6 12 8 8 8 8 8 12

min 0.17 0.21 0.32 0.37 0.20 0.21 0.20 0.19 0.21 0.22 0.20 0.26

max 0.34 0.34 0.90 0.68 0.35 0.48 0.47 0.43 0.57 0.41 1.10 0.78

median 0.24 0.25 0.56 0.44 0.30 0.32 0.34 0.28 0.39 0.30 0.37 0.47

TN Lower Swan Canning Estuary (Bottom)

n 9 6 7 8 8 12 8 8 8 8 8 12

min 0.11 0.10 0.14 0.23 0.17 0.14 0.18 0.13 0.21 0.23 0.19 0.24

max 0.31 0.26 0.69 0.45 0.33 0.39 0.46 0.44 0.50 0.40 0.52 0.45

median 0.22 0.17 0.36 0.34 0.23 0.25 0.29 0.26 0.37 0.28 0.30 0.30

TN Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.37 0.43 0.94 0.70 0.50 0.52 0.51 0.46 0.53 0.52 1.00 0.81

max 0.67 0.83 2.00 1.10 1.20 1.20 1.10 0.83 1.10 1.10 3.90 2.10

median 0.48 0.57 1.45 0.98 0.75 0.80 0.68 0.71 0.82 0.85 2.15 1.30

TN Middle Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.29 0.31 0.74 0.63 0.44 0.36 0.35 0.38 0.62 0.49 0.53 0.55

max 0.60 0.63 1.50 1.10 0.85 0.90 0.76 0.82 0.88 0.80 1.80 1.90

median 0.45 0.50 1.03 0.88 0.64 0.66 0.56 0.66 0.71 0.64 1.10 0.76

TN Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.46 0.78 1.10 0.81 0.90 0.83 0.81 0.89 1.10 0.99 1.40 1.20

max 1.60 0.90 1.80 1.10 1.10 1.50 1.10 1.10 3.70 2.90 3.90 1.70

median 0.64 0.84 1.60 0.96 0.99 0.97 1.00 0.98 1.60 1.35 2.45 1.40

TN Upper Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.44 0.51 1.20 0.82 0.90 0.75 0.85 0.77 0.92 0.94 1.40 0.92

max 0.75 0.81 1.80 1.20 1.20 1.30 1.10 1.00 3.60 2.50 3.70 1.70

median 0.55 0.74 1.55 1.00 0.98 0.97 0.95 0.93 1.25 1.20 2.10 1.30



Figure 10 2015-16 Total Nitrogen (TN) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) TN data, in the Canning Estuary and Lower Canning River.

(a) TN Canning Estuary (Surface)


TN

(m

g L

-1)

0

1

2

3

4

5




(b) TN Canning Estuary (Bottom)


TN

(m

g L

-1)

0

1

2

3

4

5




(c) TN Lower Canning River (Surface)


TN

(m

g L

-1)

0

1

2

3

4

5

(d) TN Lower Canning River (Bottom)


TN

(m

g L

-1)

0

1

2

3

4

5



Table 7 Canning Total Nitrogen (TN) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


TN Canning Estuary (Surface)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.29 0.28 0.4 0.41 0.23 0.31 0.19 0.34 0.44 0.36 0.44 0.48

max 0.88 1.10 1.30 1.10 0.93 1.30 0.95 1.40 1.20 0.93 1.50 1.40

median 0.52 0.53 0.79 0.68 0.51 0.65 0.56 0.82 0.80 0.67 0.83 0.80

TN Canning Estuary (Bottom)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.27 0.20 0.40 0.33 0.28 0.33 0.22 0.27 0.32 0.31 0.39 0.35

max 0.76 0.70 1.30 1.30 1.20 1.30 0.99 0.96 1.20 0.92 2.10 1.50

median 0.46 0.44 0.64 0.60 0.48 0.66 0.49 0.64 0.80 0.62 0.62 0.58

TN Lower Canning River (Surface)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.78 0.92 0.95 0.85 0.85 0.63 0.63 0.73 0.66 0.76 0.75 0.72

max 1.10 1.30 1.30 1.30 1.30 0.89 0.91 1.20 1.10 1.10 1.10 1.40

median 0.91 1.03 1.20 0.97 0.97 0.71 0.74 0.80 0.88 0.94 0.88 0.79

TN Lower Canning River (Bottom)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.72 0.89 1.10 0.90 0.78 0.60 0.64 0.69 0.64 0.77 0.70 0.61

max 1.10 1.30 1.60 1.40 1.50 0.91 1.10 1.50 1.40 1.20 1.10 1.30

median 0.88 1.08 1.20 0.99 0.98 0.73 0.76 0.82 0.95 0.95 0.79 0.77



5 Ammonium Nitrogen

Figure 11 2015-16 Ammonium Nitrogen (NH3-N) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) NH3-N data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(e) NH3-N Upper Swan Estuary (Surface)


NH

3-N

(m

g L

-1)

0.0

0.2

0.4

0.6

(f) NH3-N Upper Swan Estuary (Bottom)


NH

3-N

(m

g L

-1)

0.0

0.2

0.4

0.6

(b) NH3-N Lower Swan Canning Estuary (Bottom)


NH

3-N

(m

g L

-1)

0.0

0.2

0.4

0.6




(c) NH3-N Middle Swan Estuary (Surface)


NH

3-N

(m

g L

-1)

0.0

0.2

0.4

0.6

(d) NH3-N Middle Swan Estuary (Bottom)


NH

3-N

(m

g L

-1)

0.0

0.2

0.4

0.6

(a) NH3-N Lower Swan Canning Estuary (Surface)


NH

3-N

(m

g L

-1)

0.0

0.2

0.4

0.6






Table 8 Swan Ammonium Nitrogen (NH3-N) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


NH3-N Lower Swan Canning Estuary (Surface)

n 9 6 7 8 8 12 8 8 8 8 8 12

min <0.010 <0.010 0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010

max 0.027 0.020 0.054 0.013 0.011 0.033 0.024 0.024 0.033 0.017 0.034 0.021

median 0.015 <0.010 0.019 <0.010 <0.010 <0.010 0.011 <0.010 0.017 0.012 0.010 <0.010

NH3-N Lower Swan Canning Estuary (Bottom)

n 9 6 7 8 8 12 8 8 8 8 8 12

min 0.014 0.014 0.012 0.018 0.013 0.010 0.013 <0.010 0.012 0.015 0.010 0.011

max 0.066 0.059 0.087 0.120 0.039 0.075 0.020 0.025 0.052 0.038 0.045 0.039

median 0.035 0.031 0.067 0.041 0.024 0.026 0.014 0.018 0.034 0.020 0.023 0.020

NH3-N Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.014 0.012 0.069 <0.010 <0.010 <0.010 0.011 0.010 0.015 <0.010 0.027 <0.010

max 0.110 0.089 0.180 0.120 0.019 0.039 0.019 0.065 0.032 0.037 0.590 0.320

median 0.033 0.076 0.120 0.034 <0.010 0.014 0.013 0.022 0.019 0.014 0.335 0.018

NH3-N Middle Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.030 0.031 0.056 0.022 <0.010 <0.010 0.014 0.032 0.029 0.010 0.051 0.013

max 0.200 0.250 0.480 0.260 0.220 0.160 0.046 0.080 0.130 0.079 0.910 0.630

median 0.110 0.155 0.255 0.120 0.037 0.053 0.024 0.066 0.074 0.050 0.500 0.094

NH3-N Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min <0.010 0.018 0.014 <0.010 0.010 <0.010 <0.010 0.015 <0.010 0.041 0.011 <0.010

max 0.170 0.180 0.160 0.089 0.190 0.038 0.018 0.150 0.084 0.830 0.640 0.110

median 0.049 0.054 0.086 0.026 0.020 0.016 0.014 0.031 0.013 0.150 0.355 0.020

NH3-N Upper Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.012 0.180 0.019 <0.010 0.012 0.023 0.013 0.052 <0.010 0.110 0.023 <0.010

max 0.210 0.440 0.160 0.120 0.390 0.200 0.120 0.190 0.240 0.750 1.300 0.200

median 0.160 0.220 0.088 0.033 0.086 0.072 0.078 0.130 0.100 0.170 0.930 0.039



Figure 12 2015-16 Ammonium Nitrogen (NH3-N) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) NH3-N data, in the Canning Estuary and Lower Canning River.

(a) NH3-N Canning Estuary (Surface)


NH

3-N

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0




(b) NH3-N Canning Estuary (Bottom)


NH

3-N

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

Monthly background 10th & 90th perfcentile

Monthyl background Median


(c) NH3-N Lower Canning River (Surface)


NH

3-N

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

(d) NH3-N Lower Canning River (Bottom)


NH

3-N

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0



Table 9 Canning Ammonium Nitrogen (NH3-N) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


NH3-N Canning Estuary (Surface)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.035 0.013 0.032 <0.010 <0.010 <0.010 0.013 <0.010 0.016 0.015 0.010 <0.010

max 0.310 0.190 0.190 0.100 0.075 0.140 0.047 0.039 0.036 0.029 0.120 0.230

median 0.089 0.065 0.047 0.045 0.026 0.022 0.020 0.026 0.021 0.023 0.022 0.025

NH3-N Canning Estuary (Bottom)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.034 0.035 0.042 0.027 <0.010 <0.010 0.015 0.012 0.020 0.015 <0.010 <0.010

max 0.330 0.250 0.350 0.240 0.130 0.520 0.050 0.110 0.050 0.062 1.200 0.900

median 0.160 0.165 0.103 0.099 0.059 0.031 0.023 0.029 0.025 0.026 0.045 0.048

NH3-N Lower Canning River (Surface)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.038 0.053 <0.005 0.029 0.018 0.017 0.014 <0.010 0.015 0.019 0.010 0.013

max 0.130 0.085 0.051 0.073 0.094 0.110 0.085 0.047 0.022 0.110 0.066 0.095

median 0.078 0.067 0.031 0.063 0.032 0.043 0.023 0.024 0.020 0.025 0.020 0.063

NH3-N Lower Canning River (Bottom)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.051 0.066 0.019 0.052 0.027 0.018 0.013 0.024 0.020 0.024 0.016 0.014

max 0.220 0.095 0.064 0.084 0.680 0.150 0.220 0.220 0.310 0.150 0.076 0.160

median 0.125 0.075 0.044 0.075 0.087 0.088 0.054 0.046 0.025 0.065 0.027 0.069



6 Total Oxidised Nitrogen

Figure 13 2015-16 Total Oxidised Nitrogen (NOx-N) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) NOx-N data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(e) NOx-N Upper Swan Estuary (Surface)


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

(b) NOx-N Lower Swan Canning Estuary (Bottom)


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8




(c) NOx-N Middle Swan Estuary (Surface)


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

(d) NOx-N Middle Swan Estuary (Bottom)


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

(a) NOx-N Lower Swan Canning Estuary (Surface)


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8



15/16 Monthly Median

(f) NOx-N Upper Swan Estuary (Bottom)


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8



Table 10 Swan Total Oxidised Nitrogen (NOx-N) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


NOx-N Lower Swan Canning Estuary (Surface)

n 9 6 7 8 8 12 8 8 8 8 8 12

min <0.010 <0.010 0.026 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010

max 0.035 0.026 0.190 0.038 0.025 0.010 <0.010 0.011 <0.010 0.020 0.034 0.017

median 0.013 <0.010 0.030 0.016 0.010 <0.010 <0.010 <0.010 <0.010 <0.010 0.012 <0.010

NOx-N Lower Swan Canning Estuary (Bottom)

n 9 6 7 8 8 12 8 8 8 8 8 12

min <0.010 0.010 0.012 0.023 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 0.010 <0.010

max 0.033 0.029 0.079 0.051 0.029 0.019 <0.010 <0.010 0.015 <0.010 0.033 0.017

median 0.025 0.021 0.045 0.035 0.019 <0.010 <0.010 <0.010 <0.010 <0.010 0.017 0.013

NOx-N Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.014 0.028 0.100 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 0.075 <0.010

max 0.093 0.140 0.690 0.110 0.026 0.014 <0.010 0.026 <0.010 0.011 1.700 0.210

median 0.035 0.070 0.215 0.056 0.013 <0.010 <0.010 0.013 <0.010 <0.010 0.425 0.010

NOx-N Middle Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.012 0.017 0.073 0.015 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010

max 0.064 0.057 0.150 0.081 0.040 0.018 <0.010 0.022 0.014 <0.010 0.046 0.017

median 0.041 0.046 0.105 0.060 0.016 <0.010 <0.010 0.015 <0.010 <0.010 0.029 <0.010

NOx-N Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min <0.010 0.068 0.049 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 0.016 <0.010 <0.010

max 0.120 0.120 0.580 0.055 0.091 0.030 0.012 0.068 0.031 0.087 1.700 0.200

median 0.050 0.095 0.295 0.038 0.024 <0.010 <0.010 0.023 <0.010 0.028 0.760 0.011

NOx-N Upper Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min <0.010 0.031 0.051 <0.010 <0.010 <0.010 <0.010 0.013 <0.010 0.015 0.012 <0.010

max 0.130 0.140 0.590 0.063 0.090 0.034 0.019 0.063 0.016 0.068 1.600 0.190

median 0.063 0.077 0.294 0.029 0.030 <0.010 <0.010 0.019 <0.010 0.028 0.037 0.013



Figure 14 2015-16 Total Oxidised Nitrogen (NOx-N) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) NOx-N data, in the Canning Estuary and Lower Canning River.

(a) NOx-N Canning Estuary (Surface)


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2




(b) NOx-N Canning Estuary (Bottom)


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2




(c) NOx-N Lower Canning River (Surface)


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

(d) NOx-N Lower Canning River (Bottom)


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2



Table 11 Canning Total Oxidised Nitrogen (NOx-N) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


NOx-N Canning Estuary (Surface)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.011 0.033 0.097 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010

max 0.160 0.500 0.580 0.440 0.038 0.150 <0.010 0.010 0.019 <0.010 0.043 0.390

median 0.037 0.070 0.220 0.054 0.016 <0.010 <0.010 <0.010 <0.010 <0.010 0.018 <0.010

NOx-N Canning Estuary (Bottom)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.011 0.019 0.028 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010

max 0.081 0.160 0.580 0.420 0.033 0.022 <0.010 0.015 0.020 <0.010 0.029 0.089

median 0.025 0.050 0.155 0.026 0.015 <0.010 <0.010 <0.010 <0.010 <0.010 0.021 <0.010

NOx-N Lower Canning River (Surface)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.170 0.380 0.440 0.260 0.011 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 0.032

max 0.550 0.550 0.640 0.460 0.300 0.160 0.015 <0.010 <0.010 0.014 0.340 0.550

median 0.210 0.460 0.545 0.340 0.120 0.097 <0.010 <0.010 <0.010 <0.010 0.020 0.115

NOx-N Lower Canning River (Bottom)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.120 0.370 0.470 0.250 0.019 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 0.055

max 0.540 0.550 0.650 0.470 0.310 0.160 0.045 0.018 0.011 0.013 0.330 0.570

median 0.180 0.410 0.550 0.330 0.123 0.122 <0.010 <0.010 <0.010 <0.010 0.020 0.110



7 Dissolved Organic Nitrogen

Figure 15 2015-16 Dissolved Organic Nitrogen (DOrgN) (mg L-1) in surface and bottom water, over background (July 2009-May2014) DOrgN data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(e) DOrgN Upper Swan Estuary (Surface)


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

(f) DOrgN Upper Swan Estuary (Bottom)


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

(b) DOrgN Lower Swan Canning Estuary (Bottom)


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4




(c) DOrgN Middle Swan Estuary (Surface)


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

(d) DOrgN Middle Swan Estuary (Bottom)


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

(a) DOrgN Lower Swan Canning Estuary (Surface)


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4






Table 12 Swan Dissolved Organic Nitrogen (DOrgN) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


DOrgN Lower Swan Canning Estuary (Surface)

n 9 6 7 8 8 12 8 8 8 8 8 12

min 0.12 0.16 0.25 0.30 0.16 0.17 0.11 0.12 0.19 0.17 0.13 0.22

max 0.29 0.21 0.58 0.56 0.34 0.29 0.38 0.31 0.42 0.30 0.47 0.68

median 0.17 0.18 0.41 0.37 0.25 0.23 0.28 0.22 0.32 0.24 0.27 0.36

DOrgN Lower Swan Canning Estuary (Bottom)

n 9 6 7 8 8 12 8 8 8 8 8 12

min 0.04 0.06 0.10 0.15 0.10 0.11 0.10 0.10 0.15 0.21 0.15 0.16

max 0.23 0.15 0.37 0.39 0.30 0.28 0.32 0.31 0.44 0.29 0.29 0.40

median 0.14 0.10 0.20 0.22 0.18 0.15 0.22 0.21 0.30 0.24 0.23 0.24

DOrgN Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.19 0.24 0.47 0.56 0.37 0.40 0.31 0.33 0.40 0.40 0.56 0.57

max 0.41 0.46 1.10 0.80 0.66 0.63 0.69 0.61 0.90 0.71 1.50 1.40

median 0.30 0.35 1.00 0.76 0.51 0.52 0.42 0.51 0.64 0.56 1.05 0.90

DOrgN Middle Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.15 0.16 0.33 0.43 0.32 0.29 0.22 0.30 0.40 0.41 0.36 0.37

max 0.37 0.24 1.10 0.96 0.56 0.56 0.61 0.60 0.79 0.65 0.81 1.00

median 0.21 0.19 0.54 0.64 0.43 0.43 0.39 0.45 0.57 0.49 0.51 0.55

DOrgN Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.28 0.38 0.94 0.64 0.65 0.63 0.67 0.57 0.89 0.73 1.00 0.83

max 0.57 0.61 1.10 0.85 0.79 0.87 0.84 0.72 2.00 1.60 1.40 1.30

median 0.38 0.49 0.99 0.73 0.72 0.73 0.79 0.64 1.20 0.99 1.25 1.10

DOrgN Upper Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.21 0.20 0.94 0.63 0.53 0.59 0.59 0.53 0.63 0.70 0.56 0.67

max 0.40 0.45 1.10 0.89 0.75 0.78 0.76 0.73 1.70 1.60 1.30 1.30

median 0.29 0.28 0.99 0.76 0.72 0.69 0.70 0.63 1.02 0.82 0.79 1.05



Figure 16 2015-16 Dissolved Organic Nitrogen (DOrgN) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) DOrgN data, in the Canning Estuary and Lower Canning River.

(c) DOrgN Lower Canning River (Surface)


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

(d) DOrgN Lower Canning River (Bottom)


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

(a) DOrgN Canning Estuary (Surface)


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2




(b) DOrgN Canning Estuary (Bottom)


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2






Table 13 Canning Dissolved Organic Nitrogen (DOrgN) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


DOrgN Canning Estuary (Surface)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.22 0.15 0.28 0.34 0.17 0.30 0.16 0.22 0.31 0.26 0.29 0.32

max 0.42 0.35 0.56 0.60 0.66 0.52 0.70 0.62 0.81 0.61 0.56 0.51

median 0.25 0.24 0.38 0.37 0.26 0.40 0.36 0.45 0.59 0.45 0.44 0.37

DOrgN Canning Estuary (Bottom)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.17 0.08 0.16 0.27 0.16 0.23 0.17 0.21 0.25 0.27 0.30 0.27

max 0.32 0.23 0.58 0.65 0.62 0.67 0.61 0.60 0.78 0.62 0.90 0.45

median 0.24 0.15 0.29 0.34 0.27 0.34 0.33 0.42 0.57 0.43 0.44 0.35

DOrgN Lower Canning River (Surface)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.37 0.33 0.40 0.34 0.62 0.42 0.47 0.54 0.51 0.46 0.42 0.43

max 0.50 0.52 0.61 0.64 0.76 0.60 0.64 0.66 0.78 0.67 0.69 0.69

median 0.46 0.42 0.56 0.46 0.65 0.48 0.56 0.57 0.65 0.57 0.53 0.49

DOrgN Lower Canning River (Bottom)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.32 0.35 0.41 0.33 0.54 0.38 0.51 0.52 0.50 0.50 0.40 0.42

max 0.48 0.54 0.61 0.66 0.77 0.56 0.70 0.86 0.77 0.65 0.69 0.67

median 0.41 0.42 0.51 0.46 0.66 0.48 0.55 0.57 0.70 0.60 0.53 0.47



8 Total Phosphorus

Figure 17 2015-16 Total Phosphorus (TP) (mg L-1) in surface and bottom water, over background (June 2008-May 2013) TP data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(e) TP Upper Swan Estuary (Surface)


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

(b) TP Lower Swan Canning Estuary (Bottom)


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4




(c) TP Middle Swan Estuary (Surface)


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

(d) TP Middle Swan Estuary (Bottom)


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

(a) TP Lower Swan Canning Estuary (Surface)


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4




(f) TP Upper Swan Estuary (Bottom)


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4



Table 14 Swan Total Phosphorus (TP) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


TP Lower Swan Canning Estuary (Surface)

n 9 6 7 8 6 12 8 8 8 8 8 12

min <0.005 0.009 0.008 0.010 <0.005 0.013 0.019 0.013 0.024 0.017 0.027 0.022

max 0.035 0.022 0.030 0.026 0.020 0.040 0.039 0.054 0.058 0.054 0.110 0.095

median 0.020 0.017 0.017 0.016 0.014 0.026 0.030 0.030 0.042 0.039 0.044 0.042

TP Lower Swan Canning Estuary (Bottom)

n 9 6 7 8 8 12 8 8 8 8 8 12

min 0.011 0.010 0.009 0.009 0.010 0.010 0.015 0.012 0.026 0.020 0.028 0.015

max 0.036 0.034 0.052 0.031 0.027 0.047 0.047 0.051 0.057 0.056 0.051 0.049

median 0.024 0.018 0.024 0.019 0.021 0.028 0.029 0.028 0.042 0.042 0.039 0.030

TP Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.020 0.027 0.034 0.032 0.031 0.062 0.058 0.073 0.080 0.074 0.110 0.045

max 0.073 0.059 0.061 0.061 0.120 0.170 0.160 0.140 0.170 0.200 0.220 0.340

median 0.042 0.038 0.050 0.046 0.064 0.110 0.115 0.130 0.130 0.165 0.180 0.150

TP Middle Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.029 0.025 0.026 0.033 0.028 0.031 0.048 0.063 0.074 0.071 0.041 0.079

max 0.091 0.110 0.097 0.091 0.180 0.180 0.140 0.190 0.160 0.170 0.600 0.570

median 0.052 0.063 0.062 0.056 0.063 0.101 0.102 0.145 0.130 0.135 0.200 0.275

TP Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.033 0.036 0.048 0.043 0.031 0.044 0.069 0.070 0.120 0.160 0.060 0.037

max 0.190 0.075 0.073 0.055 0.110 0.200 0.180 0.140 0.540 0.490 0.140 0.140

median 0.050 0.046 0.058 0.047 0.065 0.100 0.120 0.115 0.190 0.170 0.100 0.060

TP Upper Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.027 0.051 0.047 0.044 0.037 0.048 0.076 0.069 0.160 0.170 0.080 0.038

max 0.092 0.082 0.088 0.140 0.150 0.220 0.180 0.170 0.550 0.400 0.720 0.350

median 0.059 0.072 0.063 0.058 0.080 0.120 0.145 0.135 0.180 0.180 0.460 0.059



Figure 18 2015-16 Total Phosphorus (TP) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) TP data, in the Canning Estuary and Lower Canning River.

(c) TP Lower Canning River (Surface)


TP

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

(d) TP Lower Canning River (Bottom)


TP

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

(a) TP Canning Estuary (Surface)


TP

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0




(b) TP Canning Estuary (Bottom)


TP

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0






Table 15 Canning Total Phosphorus (TP) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


TP Canning Estuary (Surface)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.026 0.020 0.020 0.410 0.230 0.310 0.034 0.053 0.058 0.050 0.054 0.038

max 0.099 0.100 0.074 1.100 0.930 1.300 0.150 0.290 0.180 0.140 0.180 0.180

median 0.039 0.042 0.049 0.675 0.510 0.645 0.070 0.140 0.120 0.078 0.088 0.120

TP Canning Estuary (Bottom)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.023 0.018 0.026 0.330 0.280 0.330 0.035 0.043 0.050 0.041 0.041 0.042

max 0.190 0.067 0.077 1.300 1.200 1.300 0.160 0.370 0.200 0.120 0.760 0.600

median 0.051 0.045 0.044 0.600 0.480 0.660 0.061 0.116 0.115 0.075 0.072 0.120

TP Lower Canning River (Surface)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.043 0.047 0.063 0.850 0.850 0.630 0.048 0.057 0.048 0.042 0.041 0.055

max 0.082 0.059 0.071 1.300 1.300 0.890 0.086 0.180 0.071 0.083 0.100 0.075

median 0.051 0.054 0.068 0.970 0.965 0.710 0.062 0.068 0.057 0.056 0.086 0.065

TP Lower Canning River (Bottom)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.034 0.046 0.067 0.900 0.780 0.600 0.044 0.053 0.046 0.054 0.037 0.045

max 0.071 0.064 0.140 1.400 1.500 0.910 0.220 0.310 0.370 0.120 0.110 0.130

median 0.061 0.054 0.070 0.990 0.975 0.730 0.093 0.089 0.076 0.059 0.085 0.068



9 Soluble Reactive Phosphorus

Figure 19 2015-16 Soluble Reactive Phosphorus (SRP) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) SRP data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(e) SRP Upper Swan Estuary (Surface)


SR

P (

mg

L-1

)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

(f) SRP Upper Swan Estuary (Bottom)


SR

P (

mg

L-1

)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

(b) SRP Lower Swan Canning Estuary (Bottom)


SR

P (

mg

L-1

)

0.00

0.05

0.10

0.15

0.20

0.25

0.30




(c) SRP Middle Swan Estuary (Surface)


SR

P (

mg

L-1

)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

(d) SRP Middle Swan Estuary (Bottom)


SR

P (

mg

L-1

)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

(a) SRP Lower Swan Canning Estuary (Surface)


SR

P (

mg

L-1

)

0.00

0.05

0.10

0.15

0.20

0.25

0.30






Table 16 Swan Soluble Reactive Phosphorus (SRP) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


SRP Lower Swan Canning Estuary (Surface)

n 9 6 7 8 8 12 8 8 8 8 8 12

min <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 0.008 0.009 0.005 0.009 <0.005 0.008

max 0.015 0.010 0.010 0.006 0.015 0.018 0.021 0.028 0.028 0.025 0.023 0.045

median 0.009 <0.005 0.005 <0.005 0.008 0.011 0.015 0.022 0.016 0.017 0.018 0.015

SRP Lower Swan Canning Estuary (Bottom)

n 9 6 7 8 8 12 8 8 8 8 8 12

min <0.005 0.005 0.005 0.006 0.008 <0.005 0.008 0.009 0.009 0.012 0.017 0.010

max 0.021 0.018 0.019 0.021 0.022 0.031 0.023 0.028 0.029 0.026 0.029 0.027

median 0.014 0.012 0.017 0.011 0.012 0.017 0.016 0.023 0.019 0.023 0.021 0.021

SRP Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.008 <0.005 0.013 <0.005 0.007 0.019 0.016 0.044 0.031 0.034 0.008 0.013

max 0.032 0.021 0.025 0.028 0.042 0.074 0.079 0.110 0.110 0.110 0.120 0.160

median 0.018 0.016 0.019 0.009 0.017 0.049 0.037 0.083 0.055 0.087 0.064 0.028

SRP Middle Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.010 0.009 0.008 <0.005 0.006 0.013 0.021 0.037 0.030 0.032 0.007 0.027

max 0.043 0.049 0.073 0.045 0.071 0.091 0.088 0.120 0.130 0.120 0.530 0.480

median 0.031 0.036 0.038 0.025 0.039 0.055 0.048 0.095 0.076 0.083 0.140 0.180

SRP Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.014 0.010 0.014 <0.005 0.008 0.016 0.022 0.027 0.029 0.096 0.005 <0.005

max 0.045 0.028 0.025 0.014 0.037 0.070 0.070 0.097 0.120 0.330 0.077 0.020

median 0.024 0.023 0.017 0.008 0.019 0.035 0.037 0.054 0.075 0.120 0.044 0.010

SRP Upper Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 0.014 0.038 0.010 <0.005 0.006 0.016 0.020 0.038 0.032 0.110 0.007 <0.005

max 0.048 0.073 0.027 0.024 0.071 0.087 0.090 0.100 0.180 0.260 0.620 0.270

median 0.037 0.046 0.018 0.008 0.029 0.059 0.049 0.088 0.125 0.130 0.280 0.015



Figure 20 2015-16 Soluble Reactive Phosphorus (SRP) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) SRP data, in the Canning Estuary and Lower Canning River.

(a) SRP Canning Estuary (Surface)


SR

P (

mg

L-1

)

0.0

0.2

0.4

0.6

0.8

1.0




(b) SRP Canning Estuary (Bottom)


SR

P (

mg

L-1

)

0.0

0.2

0.4

0.6

0.8

1.0




(c) SRP Lower Canning River (Surface)


SR

P (

mg

L-1

)

0.0

0.2

0.4

0.6

0.8

1.0

(d) SRP Lower Canning River (Bottom)


SR

P (

mg

L-1

)

0.0

0.2

0.4

0.6

0.8

1.0



Table 17 Canning Soluble Reactive Phosphorus (SRP) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


SRP Canning Estuary (Surface)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.016 0.013 0.013 <0.005 0.011 0.014 0.018 0.031 0.025 0.026 0.012 <0.005

max 0.036 0.039 0.039 0.037 0.036 0.062 0.067 0.088 0.100 0.069 0.044 0.098

median 0.023 0.023 0.021 0.017 0.020 0.031 0.029 0.058 0.056 0.035 0.028 0.033

SRP Canning Estuary (Bottom)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 0.018 0.009 0.014 0.010 0.016 0.023 0.020 0.033 0.029 0.026 0.013 0.018

max 0.093 0.048 0.054 0.037 0.110 0.280 0.072 0.260 0.120 0.069 0.700 0.440

median 0.034 0.035 0.031 0.028 0.025 0.036 0.031 0.073 0.058 0.038 0.022 0.059

SRP Lower Canning River (Surface)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.017 0.030 0.023 0.034 0.020 0.033 0.012 0.015 0.010 <0.005 0.008 0.008

max 0.050 0.036 0.040 0.048 0.047 0.066 0.035 0.066 0.021 0.010 0.033 0.039

median 0.031 0.033 0.030 0.037 0.028 0.043 0.023 0.024 0.014 0.003 0.024 0.026

SRP Lower Canning River (Bottom)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 0.015 0.030 0.027 0.034 0.023 0.040 0.019 0.016 0.009 <0.005 0.007 0.009

max 0.037 0.039 0.038 0.065 0.047 0.077 0.150 0.120 0.190 0.030 0.036 0.042

median 0.030 0.033 0.033 0.038 0.034 0.056 0.039 0.035 0.015 0.011 0.024 0.027



10 Silica

Figure 21 2015-16 Silica (soluble reactive as Silicon (SiO2-Si)) (mg L-1) in surface and bottom water, over background (June 2010-May 2015) SiO2-Si data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(f) SiO2-Si Upper Swan Estuary (Bottom)


SiO

2-S

i (m

g L

-1)

0

2

4

6

8

(b) SiO2-Si Lower Swan Canning Estuary (Bottom)


SiO

2-S

i (m

g L

-1)

0

2

4

6

8




(c) SiO2-Si Middle Swan Estuary (Surface)


SiO

2-S

i (m

g L

-1)

0

2

4

6

8

(d) SiO2-Si Middle Swan Estuary (Bottom)


SiO

2-S

i (m

g L

-1)

0

2

4

6

8

(a) SiO2-Si Lower Swan Canning Estuary (Surface)


SiO

2-S

i (m

g L

-1)

0

2

4

6

8




(e) SiO2-Si Upper Swan Estuary (Surface)


SiO

2-S

i (m

g L

-1)

0

2

4

6

8



Table 18 Swan Silica (soluble reactive as Silicon (SiO2-Si)) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


SiO2-Si Lower Swan Canning Estuary (Surface)

n 9 6 7 8 8 12 8 8 8 8 8 12

min 0.52 0.98 1.30 1.20 0.34 0.69 0.67 0.83 0.89 1.000 0.730 1.600

max 1.80 1.70 3.10 2.70 1.70 2.50 1.70 2.20 2.20 2.400 2.300 3.400

median 1.40 1.20 2.00 1.70 0.85 1.45 1.20 1.45 1.60 1.950 1.550 2.500

SiO2-Si Lower Swan Canning Estuary (Bottom)

n 9 6 7 8 8 12 8 8 8 8 8 12

min 0.44 0.51 1.00 0.54 0.15 0.46 0.44 0.59 1.00 1.400 1.000 0.970

max 1.70 1.50 2.50 2.60 1.50 2.10 1.50 2.10 2.90 2.300 1.900 2.600

median 1.40 0.95 1.40 1.65 0.79 1.35 0.86 1.40 1.90 2.050 1.500 1.900

SiO2-Si Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 1.90 1.70 3.10 2.40 2.10 2.00 1.20 1.50 2.00 2.300 2.700 3.300

max 3.00 3.40 5.60 3.60 3.40 3.90 3.60 3.10 2.90 2.800 6.600 5.500

median 2.10 2.45 4.60 2.85 2.50 2.80 2.00 2.05 2.30 2.450 4.500 4.250

SiO2-Si Middle Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 1.60 1.30 2.20 2.40 1.80 1.80 1.60 1.70 2.30 2.300 2.200 2.800

max 2.30 2.10 4.70 3.60 3.20 3.20 2.80 2.90 2.80 2.800 3.800 4.600

median 1.90 1.70 2.90 2.80 2.30 2.65 2.00 2.10 2.60 2.600 3.100 3.600

SiO2-Si Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 2.80 3.00 4.70 3.00 2.20 3.00 2.10 2.50 2.80 2.700 4.900 2.700

max 4.20 4.30 6.30 4.00 3.70 4.70 4.10 5.90 7.10 7.100 7.400 5.200

median 3.50 4.00 5.25 3.30 3.40 4.00 3.40 3.85 3.50 3.550 6.200 4.550

SiO2-Si Upper Swan Estuary (Bottom)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 2.50 1.90 4.70 3.10 2.20 3.10 2.20 2.10 2.90 2.500 3.300 2.700

max 4.00 3.90 6.50 4.10 3.90 4.80 4.20 5.90 7.30 7.100 7.500 5.300

median 2.90 2.65 5.25 3.65 3.40 4.00 3.25 3.75 3.40 3.350 4.600 4.750



Figure 22 2015-16 Silica (soluble reactive as Silicon (SiO2-Si)) (mg L-1) in surface water, over background (June 2010-May 2015) SiO2-Si data, in the Canning Estuary and Lower Canning River.

(b) SiO2-Si Lower Canning River (Surface)


SiO

2-S

i (m

g L

-1)

0

1

2

3

4

5

6

(a) SiO2-Si Canning Estuary (Surface)


SiO

2-S

i (m

g L

-1)

0

1

2

3

4

5

6






Table 19 Canning Silica (soluble reactive as Silicon (SiO2-Si)) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


SiO2-Si Canning Estuary (Surface)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 1.30 1.30 1.60 1.50 1.00 1.20 1.00 1.60 0.96 1.70 1.90 2.40

max 3.60 4.10 4.00 3.50 3.50 3.20 2.40 3.10 3.00 3.00 3.10 3.60

median 1.95 1.80 2.35 2.40 1.60 2.30 1.70 2.45 2.30 2.30 2.50 3.05

SiO2-Si Lower Canning River (Surface)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 4.20 4.00 3.00 3.40 3.40 3.00 0.27 0.29 2.70 2.50 2.20 3.20

max 5.20 4.80 4.20 3.80 3.90 3.60 2.60 4.50 4.10 3.40 4.10 4.90

median 4.75 4.50 3.65 3.55 3.55 3.20 2.00 2.15 3.45 2.90 3.10 3.95



11 Dissolved Organic Carbon

Figure 23 2015-16 Dissolved Organic Carbon (DOC) (mg L-1) in surface water, over background (June 2010-May 2015) DOC data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(b) DOC Middle Swan Estuary (Surface)


DO

C (

mg L

-1)

0

5

10

15

20

25

(c) DOC Upper Swan Estuary (Surface)


DO

C (

mg L

-1)

0

5

10

15

20

25

(a) DOC Lower Swan Canning Estuary (Surface)


DO

C (

mg L

-1)

0

5

10

15

20

25






Table 20 Swan Dissolved Organic Carbon (DOC) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


DOC Lower Swan Canning Estuary (Surface)

n 9 6 7 8 8 12 8 8 8 8 8 12

min 3 3 4 5 3 3 3 2 3 2 3 4

max 4 4 12 11 5 5 4 4 4 4 8 11

median 3 3 6 6 4 4 3 3 3 3 4 6

DOC Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 4 5 8 13 7 7 6 6 6 6 11 11

max 8 11 21 17 14 13 11 11 13 12 25 24

median 6 8 18 16 11 9 9 9 10 9 18 17

DOC Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 7 8 18 16 14 13 12 11 15 13 18 17

max 12 16 21 19 16 16 16 16 32 29 25 22

median 8 13 20 17 15 15 15 14 23 18 22 20



Figure 24 2015-16 Dissolved Organic Carbon (DOC) (mg L-1) in surface water, over background (June 2010-May 2015) DOC data, in the Canning Estuary and Lower Canning River.

(a) DOC Canning Estuary (Surface)


DO

C (

mg L

-1)

0

5

10

15

20




(b) DOC Lower Canning River (Surface)


DO

C (

mg L

-1)

0

5

10

15

20



Table 21 Canning Dissolved Organic Carbon (DOC) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


DOC Canning Estuary (Surface)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 4 4 5 6 5 4 4 4 4 4 5 5

max 9 12 14 15 17 13 13 11 11 11 9 9

median 5 5 8 9 6 10 6 9 8 7 7 7

DOC Lower Canning River (Surface)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 10 12 10 15 17 12 15 16 13 14 9 9

max 14 16 15 17 19 18 18 21 16 16 14 13

median 11 13 13 15 18 16 17 17 15 16 12 11



12 Total Suspended Solids

Figure 25 2015-16 Total Suspended Solids (TSS) (mg L-1) in surface water, over background (June 2010-May 2015) TSS data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(b) TSS Middle Swan Estuary (Surface)


TS

S (

mg

L-1)

0

5

10

15

20

(a) TSS Lower Swan Canning Estuary (Surface)


TS

S (

mg

L-1)

0

5

10

15

20




(c) TSS Upper Swan Estuary (Surface)


TS

S (

mg

L-1)

0

5

10

15

20



Table 22 Swan Total Suspended Solids (TSS) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


TSS Lower Swan Canning Estuary (Surface)

n 9 6 7 8 6 12 8 8 8 8 8 12

min 1 1 1 1 1 2 1 1 1 1 1 1

max 4 2 6 8 4 8 7 8 7 6 8 7

median 2 1.5 2 2.5 1.5 3 3 3 2 3 2 3

TSS Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 2 2 1 3 3 4 3 3 3 4 4 2

max 6 5 4 9 8 14 10 6 6 9 8 25

median 3 3 3 4.5 5 6 6 4 5 5 6 8

TSS Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 2 2 3 5 6 5 9 5 5 4 2 3

max 15 6 14 13 12 17 13 15 31 15 9 12

median 4 3.5 4.5 9.5 8.5 9 11 8 12 6 5 7



13 Alkalinity

Figure 26 2015-16 Alkalinity (tot) (CaCO3) (mg L-1) in surface water, over background (June 2010-May 2015) Alkalinity data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(a) Alkalinity Lower Swan Canning Estuary (Surface)


Alk

alin

ity (

mg L

-1)

0

20

40

60

80

100

120

140

160

180




(c) Alkalinity Upper Swan Estuary (Surface)


Alk

alin

ity (

mg L

-1)

0

20

40

60

80

100

120

140

160

180

(b) Alkalinity Middle Swan Estuary(Surface)


Alk

alin

ity (

mg L

-1)

0

20

40

60

80

100

120

140

160

180



Table 23 Swan Alkalinity (tot) (CaCO3) (mg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


Alkalinity Lower Swan Canning Estuary (Surface)

n 9 6 7 8 8 12 8 8 8 8 8 12

min 110 110 100 110 110 110 120 120 120 120 120 110

max 120 120 110 110 120 120 130 130 130 130 130 130

median 120 115 110 110 120 120 120 120 125 130 130 120

Alkalinity Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 110 110 80 88 110 110 120 120 120 120 110 110

max 120 120 110 110 120 120 130 130 140 140 140 180

median 120 115 92 93 110 120 120 130 130 130 125 145

Alkalinity Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 110 96 86 89 110 110 120 130 140 140 110 120

max 130 120 100 98 120 140 150 160 170 210 150 180

median 120 115 92 95 120 120 130 145 150 145 125 160



14 Chlorophyll a

Figure 27 2015-16 Chlorophyll a (Chl a) (µg L-1) in surface and integrated water, over background (June 2010-May 2015) Chl a data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(b) Chl a Lower Swan Canning Estuary (Integrated)


Chl a (

µg L

-1)

0

10

20

30

40

50




(a) Chl a Lower Swan Canning Estuary (Surface)


Chl a (

µg L

-1)

0

10

20

30

40

50




(d) Chl a Middle Swan Estuary (Integrated)


Chl a (

µg L

-1)

0

10

20

30

40

50

(c) Chl a Middle Swan Estuary (Surface)


Chl a (

µg L

-1)

0

10

20

30

40

50

(f) Chl a Upper Swan Estuary (Integrated)


Chl a (

µg L

-1)

0

10

20

30

40

50

(e) Chl a Upper Swan Estuary (Surface)


Chl a (

µgL

-1)

0

10

20

30

40

50



Table 24 Swan Chlorophyll a (Chl a) (µg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


Chl a Lower Swan Canning Estuary (Surface)

n 9 6 7 8 8 12 8 8 8 8 8 12

min <0.5 2.1 2.6 1.6 0.9 1.3 0.8 1.3 1.2 0.25 0.9 1.7

max 5.6 4.0 11.0 4.6 5.2 2.9 2.5 4.2 3.8 2.6 47 11

median 1.9 2.8 3.9 2.8 1.7 1.9 1.4 2.2 2.0 1.85 5.65 7.1

Chl a Lower Swan Canning Estuary (Integrated)

n 15 12 18 16 16 20 16 16 20 16 12 20

min <0.5 1.4 1.8 2.1 0.7 1.7 1.2 0.9 1.0 1.4 0.8 1.3

max 5.4 4.8 9.2 6.2 3.0 4.3 3.6 3.8 4.6 5.3 18 11

median 2.1 2.7 3.1 3.4 1.8 2.5 1.9 1.9 2.1 2.25 5.2 4.3

Chl a Middle Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 2.2 1.5 3.1 3.4 8.2 4.6 3.3 2.9 5.4 4.9 17 4.1

max 22.0 15.0 13.0 21.0 41.0 44.0 31.0 16.0 23.0 18 60 120

median 7.3 3.9 4.0 8.1 12.0 11.5 8.8 9.4 8.4 12 32 31

Chl a Middle Swan Estuary (Integrated)

n 20 16 20 16 16 20 16 16 20 16 15 20

min 1.1 1.4 1.4 1.3 2.2 3.3 3.0 2.8 4.3 3.3 7.2 2.1

max 8.2 4.2 19.0 18.0 12.0 18.0 22.0 9.6 11.0 14 48 58

median 2.4 2.4 4.0 3.1 6.1 7.6 5.7 6.5 6.2 6.95 11 19

Chl a Upper Swan Estuary (Surface)

n 12 8 8 8 8 12 8 8 8 8 8 12

min 1.0 2.8 5.7 1.5 3.9 3.8 9.8 6.8 15.0 4.1 3.5 2.1

max 94.0 31.0 23.0 29.0 34.0 50.0 25.0 21.0 290.0 35 26 59

median 14.0 16.0 11.2 11.4 15.5 15.0 17.5 14.5 22.5 18.5 11.9 14.5

Chl a Upper Swan Estuary (Integrated)

n 20 16 20 16 16 20 16 16 20 16 12 20

min <0.5 0.9 4.8 0.9 0.9 2.5 4.8 4.9 2.1 3.6 2.5 1.9

max 17.0 10 45 21.0 20.0 26.0 22.0 12.0 450.0 52 100 47

median 3.7 3.4 12.0 6.1 7.0 9.7 8.9 7.7 10.5 10.5 7.85 8.4



Figure 28 2015-16 Chlorophyll a (Chl a) (µg L-1) in surface and integrated water, over background (June 2010-May 2015) Chl a data, in the Canning Estuary and Lower Canning River.

(c) Chl a Lower Canning River (Surface)


Ch

l a

(µ

g L

-1)

0

10

20

30

40

50

60

(d) Chl a Lower Canning River (Integrated)


Ch

l a

(µ

g L

-1)

0

10

20

30

40

50

60

(a) Chl a Canning Estuary (Surface)


Ch

l a

(µ

g L

-1)

0

10

20

30

40

50

60




(b) Chl a Canning Estuary (Integrated)


Ch

l a

(µ

g L

-1)

0

10

20

30

40

50

60






Table 25 Canning Chlorophyll a (Chl a) (µg L-1) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


Chl a Canning Estuary (Surface)

n 12 8 8 8 7 8 9 8 8 7 7 12

min 1.3 1.4 1.3 1.7 2.5 1.9 1.2 1 2 1.7 8.7 1.3

max 9.5 9 8.6 22.0 20.0 24.0 16 38 23 16 71 37

median 2.8 5.4 4.4 5.0 11.0 9.9 4.1 9.2 9.9 7.7 20 14.5

Chl a Canning Estuary (Integrated)

n 20 16 15 18 14 14 15 16 14 18 15 20

min 1.1 1.2 1.1 1.1 2.6 2.9 1.6 2.5 0.8 1.5 3 2.8

max 18 4 8.3 8.3 34.0 64.0 13 22 16 16 22 30

median 2.7 2.5 2.0 4.9 6.9 6.2 4.3 6.6 6.6 6.6 7.2 8.25

Chl a Lower Canning River (Surface)

n 12 8 8 8 8 8 12 8 8 8 8 12

min 1.4 0.5 0.6 0.7 3.9 1.5 2.8 5 7.2 8 9.5 1.5

max 19 2.5 1.6 2.5 25.0 32.0 18 49 21 23 54 28

median 7.3 1.3 1.1 1.8 17.5 9.7 9.7 11.5 13 15 16.5 6.6

Chl a Lower Canning River (Integrated)

n 20 16 16 20 16 16 20 16 16 20 16 20

min 0.6 0.7 0.7 1.0 1.8 1.5 1.9 5 6 3.5 2.7 1.3

max 14 2.9 2.3 6.8 23.0 12.0 17 17 16 54 51 15

median 3.9 1.4 1.4 2.2 7.6 7.8 6 7.6 9.5 9.15 12 3.65



15 Dissolved Oxygen

Figure 29 2015-16 Dissolved Oxygen (DO) (mg L-1) (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(e) DO Upper Swan Estuary (Surface)


DO

(m

g L

-1)

0

2

4

6

8

10

12

(b) DO Lower Swan Canning Estuary (Bottom)


DO

(m

g L

-1)

0

2

4

6

8

10

12




(c) DO Middle Swan Estuary (Surface)


DO

(m

g L

-1)

0

2

4

6

8

10

12

(d) DO Middle Swan Estuary (Bottom)


DO

(m

g L

-1)

0

2

4

6

8

10

12

(a) DO Lower Swan Canning Estuary (Surface)


DO

(m

g L

-1)

0

2

4

6

8

10

12




(f) DO Upper Swan Estuary (Bottom)


DO

(m

g L

-1)

0

2

4

6

8

10

12



Figure 30 2015-16 Dissolved Oxygen (DO) (mg L-1) (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Swan River.

Figure 31 2015-16 Dissolved Oxygen (DO) (mg L-1) (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Canning Estuary and Lower Canning River.

(b) DO Swan River (Bottom)


DO

(m

g L

-1)

0

2

4

6

8

10

12




(a) DO Swan River (Surface)


DO

(m

g L

-1)

0

2

4

6

8

10

12




(c) DO Lower Canning River (Surface)


DO

(m

g L

-1)

0

2

4

6

8

10

12

14

(d) DO Lower Canning River (Bottom)


DO

(m

g L

-1)

0

2

4

6

8

10

12

14

(a) DO Canning Estuary (Surface)


DO

(m

g L

-1)

0

2

4

6

8

10

12

14




(b) DO Canning Estuary (Bottom)


DO

(m

g L

-1)

0

2

4

6

8

10

12

14






Table 26 Swan Dissolved Oxygen (DO) (mg L-1) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


DO Lower Swan Canning Estuary (Surface)

n 15 20 16 16 15 20 16 16 20 16 16 20

min 7.39 7.77 7.69 7.53 6.45 6.19 5.84 5.58 5.42 5.61 5.99 6.66

max 8.56 9.15 9.92 9.15 7.67 7.72 7.28 7.01 6.86 7.10 9.94 10.54

median 7.74 8.53 8.57 8.11 7.34 7.12 6.86 6.37 6.29 6.45 6.75 7.56

DO Lower Swan Canning Estuary (Bottom)

n 15 20 16 16 15 20 16 16 20 16 16 20

min 5.91 2.17 2.34 2.17 3.36 2.44 4.36 3.78 4.68 5.39 3.70 2.77

max 7.42 7.76 7.62 7.62 7.04 7.32 6.82 6.35 6.23 6.52 7.42 7.05

median 6.94 6.26 5.45 5.71 5.15 5.48 6.05 5.78 5.86 5.97 5.55 5.75

DO Middle Swan Estuary (Surface)

n 16 20 16 16 16 20 16 16 20 16 16 20

min 5.86 7.46 6.75 4.75 5.80 6.41 6.22 5.74 5.23 2.35 4.41 3.37

max 12.41 10.12 12.13 10.12 10.14 8.94 9.52 7.22 8.69 9.21 11.37 16.76

median 7.62 8.29 8.29 6.60 6.83 7.18 7.16 6.39 6.45 6.54 7.25 9.52

DO Middle Swan Estuary (Bottom)

n 16 20 16 16 16 20 16 16 20 16 16 20

min 2.73 2.35 0.76 2.03 1.05 0.42 4.13 2.98 3.10 1.00 0.25 0.24

max 7.11 7.02 7.58 7.02 5.96 5.83 6.54 6.61 6.65 6.30 5.55 6.78

median 5.08 4.25 2.82 3.12 4.32 4.55 5.40 4.78 4.55 5.04 0.36 0.77

DO Upper Swan Estuary (Surface)

n 20 20 20 16 16 20 16 16 20 16 15 20

min 6.03 6.66 7.63 4.26 2.80 3.20 3.52 2.58 2.67 2.10 3.11 5.00

max 12.98 11.12 11.45 10.13 7.91 10.93 8.49 8.97 11.03 7.08 8.91 9.34

median 8.25 8.09 8.35 6.98 5.90 5.89 7.01 6.92 6.48 5.56 5.47 7.21

DO Upper Swan Estuary (Bottom)

n 20 20 20 16 16 20 16 16 20 16 15 20

min 1.81 0.61 6.27 0.90 0.23 1.76 3.07 1.90 1.13 0.19 0.15 0.30

max 8.52 8.24 9.06 8.24 6.58 5.67 5.57 6.21 7.38 5.59 4.92 8.38

median 4.89 5.41 7.97 6.32 4.10 3.52 4.02 3.54 3.91 3.54 0.41 6.39

DO Swan River (Surface)

n 8 10 8 8 8 10 8 8 10 8 8 10

min 6.55 7.24 7.32 6.55 2.92 3.58 3.40 2.34 2.54 0.62 4.33 6.86

max 7.74 8.44 8.60 8.01 4.31 4.49 4.76 4.97 11.72 5.11 6.25 8.16

median 7.26 7.86 7.77 7.66 3.71 4.03 4.25 4.09 6.49 2.71 5.68 7.63

DO Swan River (Bottom)

n 8 10 8 8 8 10 8 8 10 8 8 10

min 3.61 3.03 7.30 6.43 2.82 3.31 2.98 2.15 1.25 0.39 0.93 6.77

max 5.38 8.27 8.57 7.81 4.30 4.36 4.52 4.24 11.27 5.07 5.82 8.13

median 4.23 6.16 7.67 7.42 3.57 3.80 3.84 3.19 6.10 1.81 5.11 7.52



Table 27 Canning Dissolved Oxygen (DO) (mg L-1) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


DO Canning Estuary (Surface)

n 23 16 17 18 14 14 16 14 15 18 11 20

min 1.32 2.46 2.75 5.56 1.68 2.33 2.01 3.92 4.77 3.41 2.43 2.02

max 7.99 9.10 9.49 9.21 7.30 7.22 6.35 6.56 7.14 6.60 7.09 9.86

median 6.67 7.47 8.19 7.53 6.03 5.93 5.49 5.82 6.08 5.51 5.84 6.38

DO Canning Estuary (Bottom)

n 23 16 17 18 14 14 15 14 15 18 11 20

min 0.57 0.54 1.90 3.07 0.37 1.22 0.38 2.85 4.15 1.14 0.30 0.36

max 7.40 7.34 8.25 7.45 6.53 5.69 7.08 6.46 6.44 6.23 5.96 6.98

median 4.94 4.45 4.70 4.93 3.90 4.33 5.04 5.56 5.60 5.40 4.63 2.50

DO Lower Canning River (Surface)

n 24 16 18 20 16 16 16 16 20 20 12 20

min 4.28 5.49 6.54 6.67 4.28 4.65 2.55 3.15 4.11 4.27 3.51 4.98

max 8.76 7.89 8.28 8.16 9.84 9.41 8.11 8.05 8.22 10.34 7.11 9.64

median 6.73 7.19 7.94 7.81 6.68 6.23 5.85 6.43 6.45 7.82 5.28 6.46

DO Lower Canning River (Bottom)

n 24 16 18 20 16 16 16 16 20 20 12 20

min 0.19 4.03 6.33 2.27 0.19 1.51 0.32 0.27 0.55 0.37 0.42 4.02

max 8.69 7.66 8.07 8.02 10.53 6.80 7.31 7.85 7.57 7.65 6.12 7.56

median 6.14 7.05 7.66 7.50 4.35 4.82 5.53 5.87 5.10 5.19 5.01 6.05



16 Salinity

Figure 32 2015-16 Salinity (ppt) (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(e) Salinity Upper Swan Estuary (Surface)


Sa

linity (

pp

t)

0

10

20

30

40

(b) Salinity Lower Swan Canning Estuary (Bottom)


Sa

linity (

pp

t)

0

10

20

30

40




(c) Salinity Middle Swan Estuary (Surface)


Sa

linity (

pp

t)

0

10

20

30

40

(d) Salinity Middle Swan Estuary (Bottom)


Sa

linity (

pp

t)

0

10

20

30

40

(a) Salinity Lower Swan Canning Estuary (Surface)


Sa

linity (

pp

t)

0

10

20

30

40




(f) Salinity Upper Swan Estuary (Bottom)


Sa

linity (

pp

t)

0

10

20

30

40



Figure 33 2015-16 Salinity (ppt) (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Swan River.

Figure 34 2015-16 Salinity (ppt) (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Canning Estuary and Lower Canning River.

(b) Salinity Swan River (Bottom)


Sa

linity (

pp

t)

0

10

20

30

40




(a) Salinity Swan River (Surface)


Sa

linity (

pp

t)

0

10

20

30

40






Table 28 Swan Salinity (ppt) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


Salinity Lower Swan Canning Estuary (Surface)

n 15 20 16 16 15 20 16 16 20 16 16 20

min 29.42 18.76 15.56 18.76 26.14 25.57 31.06 34.37 34.92 35.76 31.56 18.30

max 34.32 32.03 28.63 28.81 32.54 33.83 35.24 36.18 37.26 37.77 37.43 35.41

median 32.77 30.43 24.78 25.47 29.56 30.98 33.89 35.77 36.60 37.46 36.45 32.49

Salinity Lower Swan Canning Estuary (Bottom)

n 15 20 16 16 15 20 16 16 20 16 16 20

min 32.31 31.07 29.92 27.80 28.60 30.12 32.46 35.08 35.36 37.12 34.64 32.75

max 34.81 34.68 34.51 34.41 34.95 35.66 36.19 36.41 37.25 37.78 37.73 35.75

median 33.93 33.65 33.29 33.22 33.69 33.56 34.93 35.96 36.61 37.53 36.91 34.91

Salinity Middle Swan Estuary (Surface)

n 16 20 16 16 16 20 16 16 20 16 16 20

min 9.23 9.13 6.79 6.54 11.62 12.64 15.72 21.33 20.53 12.08 10.74 8.84

max 31.04 26.86 17.60 18.57 22.80 26.57 30.38 32.74 34.45 35.36 29.16 25.48

median 25.31 20.69 12.96 9.77 16.89 18.98 22.17 27.55 27.92 30.95 19.62 18.29

Salinity Middle Swan Estuary (Bottom)

n 16 20 16 16 16 20 16 16 20 16 16 20

min 25.58 10.02 9.88 7.99 15.41 16.87 19.22 23.69 22.23 28.29 26.83 19.03

max 31.95 31.42 26.35 22.80 27.06 30.00 31.75 33.75 35.28 36.01 33.67 30.59

median 29.74 28.16 20.81 18.29 21.33 23.56 25.71 29.78 30.73 32.72 31.06 26.44

Salinity Upper Swan Estuary (Surface)

n 20 20 20 16 16 20 16 16 20 16 15 20

min 5.40 5.32 4.62 5.32 7.84 7.26 7.51 9.88 12.24 5.37 5.91 8.81

max 25.31 23.80 17.51 10.05 12.18 14.29 18.02 22.76 24.33 26.18 17.13 17.80

median 19.83 12.08 12.61 7.65 8.94 9.78 12.33 17.58 17.24 20.88 11.14 14.42

Salinity Upper Swan Estuary (Bottom)

n 20 20 20 16 16 20 16 16 20 16 15 20

min 18.60 9.75 4.69 6.90 7.84 7.27 7.51 11.13 12.28 10.18 5.91 8.83

max 27.37 32.14 17.59 12.36 16.13 15.97 20.80 24.87 26.25 28.36 29.20 24.97

median 23.72 20.38 13.32 8.37 9.51 11.53 16 16 20 23.66 21.92 15.22

Salinity Swan River (Surface)

n 8 10 8 8 8 10 8 8 10 8 8 10

min 8.32 6.65 6.02 5.90 7.26 6.57 7.50 8.77 10.45 11.66 5.86 8.91

max 16.28 13.09 17.72 9.62 8.60 7.55 8.74 12.22 16.99 17.72 17.83 17.07

median 10.67 8.70 14.33 8.40 8.23 7.18 7.98 10.00 16.63 16.42 8.65 14.56

Salinity Swan River (Bottom)

n 8 10 8 8 8 10 8 8 10 8 8 10

min 14.98 6.82 6.46 6.82 7.28 6.60 7.50 8.75 10.86 11.75 5.86 8.92

max 20.59 17.95 17.72 9.76 8.60 7.56 8.77 13.91 16.99 17.74 17.95 17.07

median 18.35 10.14 14.34 8.40 8.23 7.20 7.97 10.69 16.64 17.09 9.98 14.57



Table 29 Canning Salinity (ppt) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


Salinity Canning Estuary (Surface)

n 23 16 17 18 14 14 16 14 15 18 11 20

min 0.19 0.20 0.26 0.42 2.67 0.48 22.69 26.54 17.50 31.76 0.87 0.34

max 33.28 28.86 23.60 25.22 30.17 30.44 35.79 36.99 33.83 38.71 37.85 32.09

median 23.78 22.11 8.40 13.38 22.74 22.25 31.99 34.44 29.25 37.56 33.01 21.67

Salinity Canning Estuary (Bottom)

n 23 16 17 18 14 14 15 14 15 18 11 20

min 0.19 0.21 0.31 0.43 14.37 9.38 28.31 27.89 22.11 34.06 28.92 11.84

max 33.38 31.44 32.21 29.28 32.97 32.00 35.84 37.00 33.84 38.71 37.85 34.27

median 29.25 28.50 23.74 23.60 27.06 25.43 32.00 34.88 31.48 37.58 33.87 28.84

Salinity Lower Canning River (Surface)

n 24 16 18 20 16 16 16 16 20 20 12 20

min 0.18 0.13 0.23 0.31 0.50 0.29 0.40 0.36 0.38 0.48 0.21 0.12

max 1.55 0.47 0.43 0.73 0.69 0.55 0.60 0.50 0.57 0.58 0.58 0.48

median 0.51 0.37 0.31 0.40 0.55 0.48 0.57 0.47 0.52 0.53 0.40 0.30

Salinity Lower Canning River (Bottom)

n 24 16 18 20 16 16 16 16 20 20 12 20

min 0.18 0.13 0.23 0.31 0.49 0.29 0.49 0.37 0.38 0.47 0.21 0.12

max 8.25 0.51 0.43 2.12 2.23 0.54 0.69 0.50 0.56 0.58 0.58 0.58

median 0.55 0.38 0.32 0.40 0.66 0.45 0.57 0.47 0.52 0.54 0.46 0.32



17 Temperature

Figure 35 2015-16 Temperature (°C) (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(e) Temperature Upper Swan Estuary (Surface)


Te

mpe

ratu

re (

oC

)

10

15

20

25

30

35

(b) Temperature Lower Swan Canning Estuary (Bottom)


Te

mpe

ratu

re (

oC

)

10

15

20

25

30

35




(c) Temperature Middle Swan Estuary (Surface)


Te

mpe

ratu

re (

oC

)

10

15

20

25

30

35

(d) Temperature Middle Swan Estuary (Bottom)


Te

mpe

ratu

re (

oC

)

10

15

20

25

30

35

(a) Temperature Lower Swan Canning Estuary (Surface)


Te

mpe

ratu

re (

oC

)

10

15

20

25

30

35




(f) Temperature Upper Swan Estuary (Bottom)


Te

mpe

ratu

re (

oC

)

10

15

20

25

30

35



Figure 36 2015-16 Temperature (°C) (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Swan River.

Figure 37 2015-16 Temperature (°C) (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Canning Estuary and Lower Canning River.

(b) Temperature Swan River (Bottom)


Te

mp

era

ture

(oC

)

10

15

20

25

30

35




(a) Temperature Swan River (Surface)


Te

mp

era

ture

(oC

)

10

15

20

25

30

35




(c) Temperature Lower Canning River (Surface)


Te

mp

era

ture

(oC

)

10

15

20

25

30

35

(d) Temperature Lower Canning River (Bottom)


Te

mp

era

ture

(oC

)

10

15

20

25

30

35

(a) Temperature Canning Estuary (Surface)


Te

mp

era

ture

(oC

)

10

15

20

25

30

35




(b) Temperature Canning Estuary (Bottom)


Te

mp

era

ture

(oC

)

10

15

20

25

30

35






Table 30 Swan Temperature (°C) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


Temperature Lower Swan Canning Estuary (Surface)

n 15 20 16 16 15 20 16 16 20 16 16 20

min 14.39 13.45 13.84 15.89 19.36 21.04 19.92 23.74 21.97 22.20 20.77 15.73

max 16.97 16.85 17.63 19.92 22.84 26.59 26.54 26.64 26.45 25.17 23.66 19.33

median 15.85 14.72 16.11 16.76 20.60 22.46 21.83 25.09 24.42 24.10 21.39 17.76

Temperature Lower Swan Canning Estuary (Bottom)

n 15 20 16 16 15 20 16 16 20 16 16 20

min 14.99 15.17 15.25 16.22 17.67 19.70 20.07 23.50 21.88 22.59 20.89 17.33

max 17.61 17.05 16.83 18.21 20.88 24.42 26.23 26.60 25.68 25.14 23.58 19.45

median 16.30 16.02 15.95 16.98 19.40 21.59 21.92 24.35 24.15 23.63 21.34 18.47

Temperature Middle Swan Estuary (Surface)

n 16 20 16 16 16 20 16 16 20 16 16 20

min 14.97 13.39 13.11 17.39 21.38 23.15 21.42 25.47 23.11 22.82 20.86 15.53

max 17.08 17.95 17.19 21.23 24.64 28.41 29.86 28.55 28.63 26.63 24.24 19.25

median 15.92 15.07 15.78 17.88 22.67 24.93 25.04 27.47 25.63 25.81 21.55 17.30

Temperature Middle Swan Estuary (Bottom)

n 16 20 16 16 16 20 16 16 20 16 16 20

min 15.56 15.00 14.66 16.51 21.66 23.13 21.27 25.45 23.02 22.90 21.18 16.38

max 17.67 17.83 17.58 20.66 23.47 27.14 28.33 28.32 28.03 26.22 24.45 20.34

median 16.93 16.39 16.11 18.28 22.48 24.48 24.43 27.39 25.73 24.77 22.11 18.44

Temperature Upper Swan Estuary (Surface)

n 20 20 20 16 16 20 16 16 20 16 15 20

min 13.76 12.56 12.32 14.80 21.03 23.17 23.37 26.37 24.28 20.85 20.29 14.45

max 17.21 17.09 16.51 21.70 24.12 28.72 29.06 28.19 28.05 26.99 22.95 18.34

median 15.84 15.33 14.43 17.09 22.48 25.91 25.92 27.42 26.49 24.90 20.97 16.43

Temperature Upper Swan Estuary (Bottom)

n 20 20 20 16 16 20 16 16 20 16 15 20

min 16.58 14.73 12.29 14.73 20.94 23.08 23.33 26.35 24.79 20.83 20.46 14.43

max 17.65 17.90 16.65 20.14 23.60 27.54 28.24 28.40 27.95 26.86 23.82 18.80

median 17.02 16.13 14.11 16.87 22.09 25.44 25.62 27.68 26.35 24.76 21.81 16.30

Temperature Swan River (Surface)

n 8 10 8 8 8 10 8 8 10 8 8 10

min 12.78 12.31 12.39 14.57 20.56 23.06 23.15 26.18 24.13 20.68 20.19 14.38

max 15.33 14.70 15.62 20.03 23.15 27.46 27.96 27.71 27.70 26.09 22.88 17.24

median 14.88 13.75 14.55 15.43 21.64 25.32 25.35 27.25 25.82 24.33 20.62 15.42

Temperature Swan River (Bottom)

n 8 10 8 8 8 10 8 8 10 8 8 10

min 16.43 13.03 12.39 14.53 20.53 22.73 23.02 26.30 24.38 20.68 20.37 14.37

max 17.45 15.84 15.71 19.83 23.01 27.37 27.84 27.78 27.71 25.97 22.82 17.21

median 16.89 14.69 14.53 15.43 21.58 25.19 25.24 27.46 25.86 24.42 20.59 15.38



Table 31 Canning Temperature (°C) (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


Temperature Canning Estuary (Surface)

n 23 16 17 18 14 14 16 14 15 18 11 20

min 13.09 12.92 12.88 14.52 19.26 20.95 23.73 20.54 20.38 22.36 19.03 14.73

max 20.31 18.36 19.61 20.73 26.61 28.69 31.53 31.65 26.78 27.82 22.63 20.79

median 16.02 15.32 15.39 16.77 20.63 24.04 26.12 24.13 23.52 24.81 20.57 17.91

Temperature Canning Estuary (Bottom)

n 23 16 17 18 14 14 15 14 15 18 11 20

min 13.01 14.13 12.66 14.40 20.25 22.28 23.54 21.54 20.42 22.29 20.62 16.98

max 21.13 18.71 20.50 21.93 27.15 29.81 30.64 31.02 26.62 27.67 22.94 22.02

median 16.80 16.32 17.21 18.43 21.41 24.59 26.17 24.11 23.49 24.68 20.95 18.84

Temperature Lower Canning River (Surface)

n 24 16 18 20 16 16 16 16 20 20 12 20

min 12.85 11.55 12.87 14.41 17.92 19.62 24.08 20.34 18.86 21.07 18.30 14.20

max 20.27 15.83 16.79 19.73 22.25 25.54 27.46 27.04 27.22 26.68 22.14 16.66

median 14.32 13.66 14.21 15.42 19.97 23.68 26.04 24.36 23.43 24.38 20.43 15.72

Temperature Lower Canning River (Bottom)

n 24 16 18 20 16 16 16 16 20 20 12 20

min 12.84 11.57 12.87 14.42 17.85 19.52 22.80 19.71 18.53 20.99 18.27 14.14

max 19.45 15.78 16.57 19.88 20.01 24.72 26.28 26.04 25.89 25.97 21.89 16.49

median 14.44 13.57 13.99 15.16 18.88 21.08 24.90 23.57 22.20 23.54 20.17 15.53



18 pH

Figure 38 2015-16 pH (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Lower Swan Canning, Middle and Upper Swan Estuary.

(e) pH Upper Swan Estuary (Surface)


pH

6.5

7.0

7.5

8.0

8.5

9.0

(b) pH Lower Swan Canning Estuary (Bottom)


pH

6.5

7.0

7.5

8.0

8.5

9.0




(c) pH Middle Swan Estuary (Surface)


pH

6.5

7.0

7.5

8.0

8.5

9.0

(d) pH Middle Swan Estuary (Bottom)


pH

6.5

7.0

7.5

8.0

8.5

9.0

(a) pH Lower Swan Canning Estuary (Surface)


pH

6.5

7.0

7.5

8.0

8.5

9.0




(f) pH Upper Swan Estuary (Bottom)


pH

6.5

7.0

7.5

8.0

8.5

9.0



Figure 39 2015-16 pH (in situ) in surface and bottom water, over background (June 2010-May 2015) Salinity data, in the Swan River.

Figure 40 2015-16 pH (in situ) in surface and bottom water, over background (June 2010-May 2015) DO data, in the Canning Estuary and Lower Canning River.

(b) pH Swan River (Bottom)


pH

6.5

7.0

7.5

8.0

8.5

9.0




(a) pH Swan River (Surface)


pH

6.5

7.0

7.5

8.0

8.5

9.0




(c) pH Lower Canning River (Surface)


pH

6.5

7.0

7.5

8.0

8.5

9.0

(d) pH Lower Canning River (Bottom)


pH

6.5

7.0

7.5

8.0

8.5

9.0

(a) pH Canning Estuary (Surface)


pH

6.5

7.0

7.5

8.0

8.5

9.0




(b) pH Canning Estuary (Bottom)


pH

6.5

7.0

7.5

8.0

8.5

9.0






Table 32 Swan pH (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


pH Lower Swan Canning Estuary (Surface)

n 15 20 16 16 15 20 16 16 20 16 16 20

min 7.86 7.88 7.91 7.89 7.90 7.82 7.59 7.75 7.59 7.76 7.82 7.75

max 8.09 8.24 8.15 8.24 8.10 8.12 8.05 8.07 8.00 8.01 8.18 8.42

median 8.00 8.02 8.06 8.11 8.06 7.97 7.96 7.94 7.91 7.96 7.97 8.02

pH Lower Swan Canning Estuary (Bottom)

n 15 20 16 16 15 20 16 16 20 16 16 20

min 7.92 7.73 7.74 7.73 7.79 7.75 7.49 7.78 7.53 7.78 7.74 7.71

max 8.12 8.14 8.13 8.17 8.08 8.11 8.07 8.10 8.02 8.00 8.05 8.07

median 7.99 7.93 7.97 7.99 7.93 7.95 7.95 7.95 7.89 7.91 7.91 7.92

pH Middle Swan Estuary (Surface)

n 16 20 16 16 16 20 16 16 20 16 16 20

min 7.41 7.56 7.55 7.31 7.57 7.72 7.44 7.64 7.56 7.19 7.35 7.53

max 8.08 7.99 8.25 7.99 8.04 8.10 8.01 7.86 7.88 7.85 8.13 8.67

median 7.75 7.71 7.70 7.53 7.75 7.82 7.84 7.73 7.72 7.76 7.83 8.04

pH Middle Swan Estuary (Bottom)

n 16 20 16 16 16 20 16 16 20 16 16 20

min 7.37 7.32 7.25 7.21 7.19 7.29 7.40 7.46 7.30 7.14 7.17 7.26

max 7.86 7.79 7.77 7.75 7.84 7.81 7.81 7.73 7.78 7.78 7.91 7.88

median 7.61 7.55 7.42 7.40 7.48 7.60 7.70 7.56 7.54 7.59 7.34 7.34

pH Upper Swan Estuary (Surface)

n 20 20 20 16 16 20 16 16 20 16 15 20

min 7.12 7.19 7.40 7.23 7.12 7.18 7.36 7.29 7.23 7.21 7.17 7.45

max 8.04 7.87 8.23 7.87 7.57 7.98 7.71 7.58 8.70 8.03 8.10 8.03

median 7.36 7.40 7.61 7.42 7.31 7.36 7.53 7.41 7.57 7.38 7.45 7.70

pH Upper Swan Estuary (Bottom)

n 20 20 20 16 16 20 16 16 20 16 15 20

min 6.88 6.98 7.36 7.09 7.01 7.07 7.23 7.10 7.13 7.08 6.90 7.22

max 7.39 7.77 7.98 7.58 7.48 7.43 7.48 7.40 8.67 8.04 8.06 7.98

median 7.18 7.23 7.58 7.32 7.16 7.25 7.37 7.26 7.31 7.27 7.16 7.65

pH Swan River (Surface)

n 8 10 8 8 8 10 8 8 10 8 8 10

min 7.16 7.40 7.48 7.27 7.10 7.23 7.37 7.26 7.30 7.27 7.31 7.42

max 7.29 7.57 7.66 7.57 7.29 7.58 7.63 7.71 8.77 8.18 8.04 7.95

median 7.25 7.46 7.62 7.44 7.18 7.34 7.46 7.36 8.58 7.83 7.78 7.80

pH Swan River (Bottom)

n 8 10 8 8 8 10 8 8 10 8 8 10

min 6.88 7.02 7.50 7.29 7.10 7.24 7.35 7.18 7.12 7.26 7.14 7.51

max 7.05 7.54 7.67 7.54 7.28 7.43 7.52 7.61 8.67 8.23 8.00 7.95

median 7.00 7.27 7.64 7.43 7.17 7.33 7.41 7.32 8.60 7.76 7.78 7.81



Table 33 Canning pH (in situ) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


pH Canning Estuary (Surface)

n 23 16 17 18 14 14 16 14 15 18 11 20

min 7.04 7.24 0.50 7.42 7.23 7.15 7.61 7.68 7.66 7.49 7.18 7.00

max 7.93 8.05 8.12 8.12 7.89 7.95 7.99 8.03 8.01 7.82 7.85 8.09

median 7.48 7.69 7.78 7.88 7.80 7.79 7.76 7.77 7.86 7.72 7.67 7.67

pH Canning Estuary (Bottom)

n 23 16 17 18 14 14 15 14 15 18 11 20

min 7.06 7.10 1.03 7.23 7.22 7.12 7.39 7.62 7.68 7.41 7.13 6.90

max 7.93 8.00 7.93 7.94 7.96 7.91 8.02 8.00 7.96 7.80 7.87 8.00

median 7.60 7.60 7.60 7.68 7.67 7.70 7.75 7.76 7.80 7.71 7.63 7.42

pH Lower Canning River (Surface)

n 24 16 18 20 16 16 16 16 20 20 12 20

min 7.08 7.23 0.51 7.42 7.29 7.24 7.32 7.25 7.28 7.34 7.07 7.18

max 7.93 7.85 8.02 7.87 8.13 8.05 8.15 8.31 8.17 8.83 8.02 8.18

median 7.36 7.49 7.54 7.60 7.48 7.60 7.68 7.87 7.62 8.05 7.42 7.40

pH Lower Canning River (Bottom)

n 24 16 18 20 16 16 16 16 20 20 12 20

min 7.01 7.17 2.62 7.26 7.07 7.04 7.02 7.00 7.09 7.11 7.00 6.97

max 7.70 7.64 7.85 7.75 7.70 7.52 7.92 8.08 7.89 8.37 7.95 7.79

median 7.26 7.35 7.48 7.49 7.32 7.31 7.57 7.59 7.38 7.72 7.32 7.30



19 Secchi Depth

Figure 41 2015-16 Secchi Disc depth (m) over background (June 2010-May 2015) Secchi Disc depth data, in the Lower Swan Canning, Middle, Upper Swan Estuary and the Swan River.

(d) Secchi Depth Swan River


Depth

(m

)

0

1

2

3

4

5

6

(a) Secchi Depth Lower Swan Canning Estuary


Depth

(m

)

0

1

2

3

4

5

6




(c) Secchi Depth Upper Swan Estuary


Depth

(m

)

0

1

2

3

4

5

6

(b) Secchi Depth Middle Swan Estuary


De

pth

(m

)

0

1

2

3

4

5

6






Table 34 Swan Secchi Disc depth (m) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


Secchi Depth Lower Swan Canning Estuary

n 20 20 16 16 16 20 16 16 20 16 16 20

min 1.4 1.7 1.6 1.2 1.5 1.3 1.3 1.2 0.6 0.7 1.0 0.9

max 15.5 6.0 5.8 4.6 5.4 5.0 5.2 5.6 7.0 6.0 5.5 5.1

median 4.6 3.5 2.7 3.6 3.7 3.2 2.9 3.1 4.1 4.0 3.2 2.1

Secchi Depth Middle Swan Estuary

n 20 20 16 16 16 20 16 16 20 16 16 20

min 0.6 1.0 0.7 1.0 0.8 0.7 0.8 1.1 0.8 0.3 0.4 0.1

max 4.7 2.5 2.4 1.7 2.3 1.9 1.8 2.0 2.2 2.6 1.4 1.6

median 1.8 1.7 1.3 1.4 1.4 1.3 1.4 1.6 1.8 1.5 1.0 0.9

Secchi Depth Upper Swan Estuary

n 20 16 20 15 16 20 16 16 20 16 16 20

min 0.5 0.6 0.5 0.6 0.7 0.5 0.7 0.8 0.2 0.1 0.4 0.3

max 2.4 1.6 1.3 1.2 1.0 1.4 1.3 1.5 1.9 1.5 1.4 1.4

median 1.3 1.4 0.8 0.8 1.0 1.1 1.0 1.0 1.0 1.0 0.8 1.0

Secchi Depth Swan River

n 10 8 10 8 8 10 8 8 10 8 8 10

min 1.4 1.1 0.5 0.4 1.0 1.1 1.1 0.9 0.2 0.1 0.5 0.3

max 1.8 1.8 1.3 0.9 1.2 1.6 1.4 1.9 1.9 0.6 1.0 1.1

median 1.6 1.2 0.7 0.6 1.1 1.3 1.3 1.1 0.3 0.3 0.8 0.8



Figure 42 2015-16 Secchi Disc depth (m) over background (June 2010-May 2015) Secchi Disc depth data, in the Canning Estuary and Lower Canning River.

(a) Secchi Depth Canning Estuary


De

pth

(m

)

0

1

2

3




(b) Secchi Depth Lower Canning River


De

pth

(m

)

0

1

2

3



Table 35 Canning Secchi Disc depth (m) monthly sample numbers (n), minimum, maximum and median values for 2015-16.


Secchi Depth Canning Estuary

n 20 16 15 18 14 14 15 16 14 18 15 20

min 0.5 0.5 0.6 0.6 0.6 0.7 0.8 0.5 0.3 0.7 0.8 0.3

max 3.4 3.8 3.5 3.8 3.2 3.3 3.9 2.9 2.8 3.1 2.2 3.0

median 1.8 1.9 1.5 1.4 1.3 1.4 1.9 1.3 1.2 1.3 1.2 0.9

Secchi Depth Lower Canning River

n 20 15 16 19 16 16 20 16 16 20 16 20

min 0.5 0.3 0.4 0.5 0.6 0.8 0.6 0.6 0.9 0.7 0.3 0.3

max 1.4 1.3 0.8 1.0 1.1 1.2 4.3 2.0 1.4 1.3 1.8 1.1

median 1.0 0.9 0.7 0.7 0.9 1.0 1.3 1.1 1.2 1.1 1.0 0.8



20 Phytoplankton

Figure 43 Swan June 2010-May 2011 integrated Phytoplankton (cells/mL).



Figure 46 Swan June 2013-May2014 integrated Phytoplankton (cells/mL).



Figure 49 Canning June 2010-May 2011 integrated Phytoplankton (cells/mL).

swan canning estuarine data report - parks and wildlife ... · table 29 canning salinity (ppt) (in...

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