stormwater mgJ00300R1V1_25_Kauri_St_Cooroy_Complete · MCU18/0165

25 Kauri St Cooroy




Image 4-2 – Total Site Un-Mitigated Design Runoff Hydrographs


Table 4-4 shows a comparison of peak flow rates between the base case and un-mitigated
developed case. It shows the impact of the proposed development is an increase in peak site
runoff ranging from 27% to 57%.

Table 4-4      Peak Flow Comparison - Base Case Vs Un-Mitigated Developed Case

                                      Un-Mitigated
                     Existing Site                         Difference            Difference
   Event                             Developed Case
                        (m3/s)                               (m3/s)                 (%)
                                          (m3/s)
  1% AEP                 0.23              0.30                 0.07                30%
  10% AEP                0.15              0.19                 0.04                27%
  50% AEP                0.07              0.11                 0.04                57%




J00300R1V1                                                                                    7