GHD | Maple Hill Creek Rehabilitation | 11115650 (2)

Appendix E Fluvial Geomorphology

Location: Date:

Length Surveyed: m Number of Cross Sections:

Drainage Area: Riparian Vegetation:Geology/Soils: Dominant Vegetation Type:Surrounding Land Use: Extent of Riparian Buffer Zone:Channel Disturbances: Width of Riparian Buffer Zone:Aquatic Vegetation: Age Class of Riparian Vegetation:

Dominant Vegetation Type: Extent of Encroachment into Channel:Portion of Reach with Vegetation: Large Woody Debris:

Measured Discharge: Not measured m3/s Calculated Bankfull Discharge: 3.99 m3/sModeled 2-year Discharge: Not calculated m3/s Calculated Bankfull Velocity: 1.47 m/sModeled 2-year Velocity: Not calculated m/s

Profile Meander GeometryBankfull Gradient: % Sinuosity:Channel Bed Gradient: % Belt Width: Not measured mRiffle Gradient: % Radius of Curvature: Not measured mRiffle Length: m Amplitude: Not measured mRiffle-Pool Spacing: m Wavelength: Not measured m

Minimum Maximum AverageBank Height (m):Bank Angle (degrees): Torvane Value (kg/cm2):Root Depth (m): Penetrometer Value (kg/cm2):Root Density (%): Bank Material (range):Undercut Banks (%)Depth of Undercut (m):

Not measured

Longitudinal Profile

1.345.3

0.1

10.0

PLANFORM CHARACTERISTICS

AverageMaximumMinimum

Not measured

BANK CHARACTERISTICS

80.00.2

0.8

25.050.0

0.1

2.0

0.10.0Not measured

Fluvial Geomorphology SummaryReach 6, Silver Creek

8

Forest / Residential

November 28, 2016

GENERAL SITE CHARACTERISTICS

University Ave W, Waterloo ON329

Trees / shrubs

1-5 Channel WidthsContinuous

5-30 yrs

34.7 Clay - sand

0.4

ModeratePresent in Channel

Attached Algae

Wood and garbage debris,

Till PlainsNot measured

0.77

5-108

3.63

0.62

30%

15.0

HYDROLOGY

328

329

330

331

332

333

334

0 100 200 300 400 500

Elev

atio

n (m

)

Distance (m)

BankfullWaterChannel

GHD Fluvial Geomorphology Summary Page 1 of 3

Bankfull Width (m):Average Bankfull Depth (m):Bankfull Width/Depth:Wetted Width (m):Average Water Depth (m):Wetted Width/Depth:Max. Wetted Depth (m):Manning's n:

Particle size Subpavement:D10 mm Particle shape:D50 mm Embeddedness (%):D90 mm Particle range (riffle):

Particle Range (pool):

36.7

0.9

Minimum

Sand

0.0375

SUBSTRATE CHARACTERISTICS

0.3

Maximum

2.7

CROSS-SECTIONAL CHARACTERISTICS

26.5

7.2

0.1

Representative Cross-Section# 1

0.16

3.54.1

4.7

12.9

10.90.2

1.6

03

4030-50

Sand-gravelSand - cobble

Sub-rounded

0.11

3.8

0.34

0.68.6

Average

0.1

0

10

20

30

40

50

60

70

80

90

100

1 10 100 1000 10000

Perc

ent f

iner

Grain size (mm)

Cumulative Particle Size Distribution

329.0

329.5

330.0

330.5

331.0

331.5

332.0

0 2 4 6 8 10 12 14 16 18

Elev

atio

n (m

)

Width (m)

Channel

Bankfull

Water

GHD Fluvial Geomorphology Summary Page 2 of 3

Flow Competency: Tractive Force at Bankfull:for D50: m/s Tractive Force at 2-year flow: Not calculatedfor D84: m/s Critical Shear Stress:

Unit Stream Power at Bankfull: W/m2

Downstream view of cross section # 1

CHANNEL THRESHOLDS

N/m235.6

52.20

0.30.9

N/m2

Reach 6 was a well defined channel confined by University Avenue along the eastern bank and a continuous andestablished forest to the west. The reach had been straightened, with sporadic cobble bank treatments installed toprevent the watercourse from eroding into University Avenue. Riparian vegetation was established, with moderateencroachment onto the banks and into the channel. Channel sinuosity, entrenchment, and gradient were moderate.

GENERAL FIELD OBSERVATIONS

N/m22.2

GHD Fluvial Geomorphology Summary Page 3 of 3