20220078 Wyandra St SWMP

                                            Figure 3.2 – DRAINS Pre-development catchment




                                           Figure 3.3 – DRAINS Post-development catchments




                                       Figure 3.4 – DRAINS Split 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 3.1 Existing and proposed unmitigated site peak discharge
rates.
                              Table 3.1 Existing and proposed unmitigated site peak discharge rates

                                                                        Wyandra Street
                                                                                                         Qchange
                                           A.E.P                Qexisting      Qproposed    Qchange       (%)
                                                                (m³/s)         (m³/s)       (m³/s)
                                             1EY                 0.016          0.018        0.002        13%
                                            50%                  0.019           0.02       0.001          5%
                                           0.2 EY                0.028           0.03       0.002          7%
                                            10%                  0.036          0.036          0           0%
                                             5%                  0.041          0.041          0           0%
                                             2%                  0.047          0.047          0           0%
                                             1%                  0.051          0.052       0.001          2%




Project number 20220078
File RECOR Preliminary Stormwater Management Report - 20220078.docx, 2022-07-13                                      Page 8 of 15
Revision 1


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