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RFI - SWMP Elands
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65-67 Elanda Street, Sunshine Beach
Site Based Stormwater Management Plan
_____________________________________________________________________________________________
For each tank, the flow discharge is the sum of the flows from the two orifices. The sum of
the flows from the proposed two detention tanks and by-pass areas shall be no greater than
the total flow discharge from pre-development site, details of which are presented in Table
3.7.
Table 3.7 Mitigated Flows using roof water Detention Tank
Storm event Peak flow from Peak flow from Sum of the peak
detention tanks all the by-pass flow (m3/s)
(m3/s) area (m3/s)
63% AEP, 25min 0.006 0.013 0.019
39% AEP, 25min 0.006 0.016 0.022
20% AEP, 25min 0.008 0.023 0.031
10% AEP, 25min 0.010 0.029 0.039
5% AEP, 25min 0.010 0.034 0.044
2% AEP, 25min 0.018 0.036 0.054
1% AEP, 25min 0.022 0.040 0.062
File Name: WCD-22936 – 65-67 Elanda_SWMP.docx
Revision: B 17
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