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Appendix C - Stormwater Management Plan
Plans and drawings
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Log in to see the plans as drawnDRAINS Modelling Results Project number: 20220213 Calculations: B. Parry Street Address: 14-16 Reserve Street Locality: Pomona, NSC Date: 19/09/2022 Pre / Post Comparison 3 3 3 A.E.P Qy Pre (m /s) Qy Post (m /s) Qchange (m /s) Qchange (%) 63.2% AEP 0.044 0.048 0.004 9% 50% AEP 0.051 0.054 0.003 6% 0.2 EY 0.080 0.091 0.011 14% 10% AEP 0.095 0.098 0.003 3% 5% AEP 0.112 0.111 -0.001 -1% 2% AEP 0.129 0.137 0.008 6% 1% AEP 0.150 0.154 0.004 3% Tank Node Assumptions3kL attenuation storage Pre / Post w/ OSD Comparison https://www.slimlinerainwatertanks.com.au/aquaslim-squared-colorbond-steel-slimline-water- 3 3 3 A.E.P Qy Pre (m /s) Qy Post (m /s) Qchange (m /s) Qchange (%) Length 2.25 63.2% AEP 0.044 0.044 0.000 0% Width 0.88 m 50% AEP 0.051 0.050 -0.001 -2% Total Area 1.98 m² 0.2 EY 0.080 0.076 -0.004 -5% Low flow orifice 50 mm 10% AEP 0.095 0.091 -0.004 -4% Overflow 150 mm 5% AEP 0.112 0.104 -0.008 -7% Tank Height 1.87 m 2% AEP 0.129 0.123 -0.006 -5% Overlow height 1.72 m 1% AEP 0.150 0.140 -0.010 -7%
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