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Appendix B - Amended Biome Consulting Response
Attached to the e-mail Amended Biome Report - stormwater in addition to Information Response - MCU170551 - 20 Trading Post Road Cooroy.msg.
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Manning's Section C - Existing & Developed Flood Comparison
Filename: \\bnenas01\projects\B14\150-199\B14158.W\01 Final Layout Op Works\SW_Quantity\[B14158.W_Mannings_Calcs.xlsx]Des XSEC C
Date: 9/09/2016
By: MS
Manning's calculation as per Equation 4.2.3 of Australian Rainfall and Runoff (1987)
CROSS SECTION DETAILS Developed 1% AEP Developed 1% AEP
POINT CH Z n wA wP n x wA wA wP n x wA
1 10.237 97.689 0.060
2 11.023 97.675 0.060 0.49 0.79 0.03 0.09 0.79 0.01
3 11.868 97.678 0.060 0.53 0.85 0.03 0.10 0.85 0.01
4 12.987 97.427 0.060 0.84 1.15 0.05 0.28 1.15 0.02
5 13.745 97.197 0.060 0.75 0.79 0.05 0.37 0.79 0.02
6 15.025 97.533 0.060 1.20 1.32 0.07 0.56 1.32 0.03
7 16.232 97.854 0.060 0.74 1.25 0.04 0.13 1.04 0.01
8 16.232 97.854 0.060 0.00 0.00 0.00
9 16.455 97.909 0.060 0.09 0.23 0.01
10 20.237 98.854 0.060 0.31 1.63 0.02
11 20.745 98.873 0.060
12 21.331 98.895 0.060
13 22.199 98.929 0.060
14 23.791 98.989 0.060
15 23.866 98.992 0.060
16 24.076 99 0.060
wA wP n x wA wA wP n x wA
TOTAL 4.95722 8.001502 0.297433 1.53479 5.932278 0.092087
S
0.006 R n Q R n Q
0.619536 0.060 4.65 0.258718 0.060 0.80
B4 Flow 4.65 3.44
WSL 98.304 98.302 97.8
Calculated by Manning's Equation 4.65 0.80
Vel (m/s) 0.94 0.52
Manning's Section C - Existing & Developed Flood Comparison
99.5
99.5
99
99
98.5
Proposed Development
98.5
98
Height (m AHD)
98 Overtops Embankment
97.5
97.5 Design Surface
97
Developed 1% AEP
Developed 1% AEP
97
96.5
96
96.5
0 5 10 15 20 25 30
96
0 5 10 15 20 25 30 35
Chainage (m)
A 0 97.9
Design Surface Exis ting Surface Exis ting 1% AEP Developed 1% AEP
A 5.466 97.97
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