supplemental swmp and bmp development...fsa workshop –sept 8, 2017 reconfigure wet detention pond...

FSA Seminar 2017

Supplemental SWMP and BMP Development

OVERVIEW

• Historical BMP’s used• Research• Structural BMP’s• Non-Structural BMP’s

SSUPPLEMENTAL

SWMPFSA Workshop – Sept 8, 2017

HISTORICAL BMP’S

CDSTM Unit and StormceptorsTM

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2nd Generation Nutrient Separating Baffle Box

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Inlet Baskets

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Storm FloTM

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Reconfigure Wet Detention Pond

• *Phosphorusremoval efficiency increase from 20% to 67%

• Estimated loading into lake improvedfrom 81.4 kg/yrto 33.6 kg/yr

Reconfiguration of FDOT Pond

• Headwaters of Howell Branch and Lake Jesup• FDOT drainage easement over entire pond• On private property (Country Club of Orlando)• City established agreement with FDOT• Special permission with golf course officials• Permits with DEP & SJRWMD• City equipment operators performed work• City compliance staff monitored turbidity

SSUPPLEMENTAL


Spring Lake Pond (FDOT)Treats 141 acresTP reduction = 6.1 lbs/yrConstruction Cost ~ $375,000

Spring Lake Pond (FDOT)Treats 141 acresTP reduction = 6.1 lbs/yrConstruction Cost ~ $375,000

Spring Lake Pond (FDOT)Spring Lake Pond (FDOT)

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y = -0.0015x + 116.5005R² = 0.2907

y = -0.0038x + 209.69R² = 0.2256

0

10

20

30

40

50

60

70

80

90

100

TRO

PHIC

STA

TE IN

DEX

DATE

Long Term TSI

Current 10-Year TSI

TSI Trend (Long Term)

TSI Trend (Current 10 Years)

OLIGOTROPHIC

MESOTROPHIC

EUTROPHIC

HYPEREUTROPHIC

Trend / Regression Analysis(Significant = R2 > 0.20, Insignificant (No Trend) = R2 < 0.20)

Long Term Trend (Significant Improvement): R2 = 0.2907

Current 10-Year Trend (Significant Improvement): R2 = 0.2256

Spring Lake Trophic State Index (Jan 1989 – Jan 2017)

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y = -0.0038x + 209.69R² = 0.2256

0

10

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30

40

50

60

70

80

90

100

TRO

PHIC

STA

TE IN

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DATE

Spring Lake Trophic State Index Trend (Jan 2007 - Jan 2017)

OLIGOTROPHIC

MESOTROPHIC

EUTROPHIC

HYPEREUTROPHIC

Trend / Regression Analysis(Significant = R2 > 0.20, Insignificant (No Trend) = R2 < 0.20)

Long Term Trend (Significant Improvement): R2 = 0.2907

Current 10-Year Trend (Significant Improvement): R2 = 0.2256

Dredged + BMP’s

Algae Bloom

Average Concentrations (mg/l)Parameter Before Projects After Projects % Reduction

n=80 n=26

TP 0.064 0.033 48TN 1.152 0.967 16

NH3 0.041 0.012 71NO3 0.023 0.010 56TSS 8.26 5.42 34

Turbidity 5.8 2.9 50Chlor a (mg/m3) 32.2 13.8 57

Spring Lake (WBID 2997S) Water Quality Improvements

ADDITIONAL RESEARCH

LAKE SILVER TMDL RESEARCH

• Internal loading ?• Sediment analyses• Interstitial/pore water• Sediment-water interface• Bottom of water column

SSUPPLEMENTAL


LS-6!

LS-5!

LS-4!

LS-3!

LS-2!LS-1

!

Lake Silver

¯Sources: Esri, HERE, DeLorme, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), swisstopo, MapmyIndia, © OpenStreetMap contributors, and the GIS User Community

0 60 120 240 Meters

Sampling Event 1:

May 11, 20168:30 am to 3:00 pm

Calm windsAir temp: ~ 30°C

Collected:Hand-held electrode data Water column samples Sediment cores

14 ft7 ft

11 ft

24 ft

26 ft

23 ft

Future Sampling Events- July 27, 2016- October 2016

Beazley Laboratory – University of Central Florida

!

LS-6!

LS-5!

LS-4

LS-3!

LS-2!LS-1

!

Lake Silver

Sources: Esri, HERE, DeLorme, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), swisstopo, MapmyIndia, © OpenStreetMap contributors, and the GIS User Community

0 60 120 240 Meters

1 2

3

6

4

5

Sediment Total P

Total P mg/kgLS-1 957LS-2 361LS-3 1301LS-4 27,420LS-5 24,332LS-6 2906

LS-1 LS-2 LS-3 LS-4 LS-5 LS-60

10

20

30

40

50

TP (%

)

Site

Total Phosphorus (%)


!

LS-6!

LS-5!

LS-4

LS-3!

LS-2!LS-1

!

Lake Silver

Sources: Esri, HERE, DeLorme, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), swisstopo, MapmyIndia, © OpenStreetMap contributors, and the GIS User Community

0 60 120 240 Meters

1 2

3

6

4

5

SedimentLS-1

6-10

4-6

2-4

1-2

0-1

0 10 20 30 40 50 60 70 80 90 100

Extracted P (%)

Dep

th (c

m)

Organic P Precipitated P Adsorbed P Exchangeable P

10

9

8

7

6

5

4

3

2

1

TP (mg/kg)0 500 1000 1500 2000

Dep

th (c

m)


3.3.3. Particulate P in the Water Column

Figure 22. The speciation of Lake Silver water column P averaged over all samples. Particulates: n= 6 (July and November); Soluble TP: n = 33 (May), n = 38 (July), n = 37 (Nov).Beazley Laboratory – University of Central Florida


• Internal loading ?• Sediment analyses• Interstitial water• Bottom of water column

• Algal identification over 24 hour cycle(Special thanks > OCEPD performed ID & quantification)

SSUPPLEMENTAL



• Internal loading ?• Sediment analyses• Interstitial water• Bottom of water column

• Algal identification over 24 hour cycle(Special thanks > OCEPD performed ID & quantification)

• Groundwater contributions• Historical use• Current uses

SSUPPLEMENTAL


Lake Silver

Citrus Groves(Ardsley Manor)

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Legend

Approximate Locations

U Groundwater Monitoring Well

.! Soil Boring/Groundwater Monitoring Well0 200 400

?! Soil Boring/Sediment Sample/Water Quality Sample

F

eetE Sciences, Incorporated FL Engineering Lic. #8691 34 East Pine Street Orlando, FL 32801 www.esciencesinc.com Phone: 407-481-9006Fax: 407-481-9627

Lake Silver

Orlando, Orange County, FL

Soil Boring, Sediment Sample,

Water Quality Sample Location Map

FIGURE

1DRAWN BY:LG

CHECKED BY:

PROJECT NUMBER: 1-1633-P05

SCALE:1 "=400 '

DATE:8/6/2015

STRUCTURAL BMP’S

LAKE SILVER TMDL –To Be Determined

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32804

NON-STRUCTURAL

BMP’S

Street Sweeping

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• Increase frequency• Incorporate both

mechanical (broom) and regenerative (vacuum)

• Rotate with trash collection

• * Future > City looking to add scales and moisture sensors to sweepers

Education

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EDUCATION

Residential• Yard waste campaign• Fertilizer ordinance• Septic maintenance• Pet waste ordinance• Storm drain markers• Florida Yards & Neighborhoods (FYN)

Commercial• Good housekeeping campaign

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EDUCATION

Work closely with Office of Communications• *Next Door• Facebook• Twitter• Website• Mayor & Commissioner Newsletters

• *Billboards

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INSPECTIONS & ENFORCEMENT

Residential• Yard waste

• Homeowner• Professional Lanscapers

• Erosion for remodeling

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INSPECTIONS & ENFORCEMENT

Commercial• Proactive – Illicit Discharge Detection & Elimination• Private stormwater system

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Questions ??

supplemental swmp and bmp development...fsa workshop –sept 8, 2017 reconfigure wet detention pond...

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