Civil Package

                                           Figure 0.2 – DRAINS Pre-development catchments




                                          Figure 0.3 – DRAINS Post-development catchments

The results of the modelling against the range of design storms for the development under the existing and
proposed development conditions are shown in Table 0.1 Existing and proposed site peak discharge rates.

                             Table 0.1 Existing and proposed site peak discharge rates (unmitigated)

            A.E.P      Qy Pre (m3/s)     Qy Post (m3/s)     Qchange (m3/s) Qchange (%)
             63.2% AEP             0.013              0.013          0.000                                        0%
               50% AEP             0.019              0.019          0.000                                        0%
               20% AEP             0.023              0.023          0.000                                        0%
               10% AEP             0.030              0.030          0.000                                        0%
                5% AEP             0.034              0.034          0.000                                        0%
                2% AEP             0.039              0.039          0.000                                        0%
                1% AEP             0.042              0.043          0.001                                        2%


Project number 20220051                                                                                       Page 11 of 16
File RECOR Stormwater Management Report - 20220051.docx, 2022-05-05 Revision 0

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