RFI - 20220156 Kauri St SWMP Rev B

DRAINS Modelling Results
Project number:     20220156                                                            Calculations:               B. Parry
Street Address:     9 Kauri Street
Locality:           Cooroy, Noosa Shire Council                                         Date:                       27/06/2022




                                              Kauri Street
       A.E.P                                                                                    Qchange (%)
                        Qexisting (m³/s)     Qproposed (m³/s)      Qchange (m³/s)
                 1EY                 0.021                0.043                0.022                      105%
                50%                  0.026                0.052                0.026                      100%
               0.2 EY                0.044                  0.08               0.036                          82%
                10%                  0.060                0.089                0.029                          48%
                  5%                 0.075                0.112                0.037                          49%
                  2%                 0.094                0.134                 0.04                          43%
                  1%                 0.106                0.147                0.041                          39%




                                              Kauri Street
       A.E.P                                                                                    Qchange (%)
                        Qexisting (m³/s)     Qmitigated (m³/s)     Qchange (m³/s)                                                OSD Tank Sizing Summary
                 1EY                 0.021                  0.02              -0.001                          -5%                Below ground attenuation chamber
                50%                  0.026                0.023               -0.003                      -12%                   Total Volume                             54 m³
               0.2 EY                0.044                  0.04              -0.004                          -9%                132mm low flow outlet at base
                10%                  0.060                0.059               -0.001                          -2%                300mm high flow outlet obvert at top of tank
                  5%                 0.075                0.073               -0.002                          -3%
                  2%                 0.094                0.092               -0.002                          -2%
                  1%                 0.106                0.106                     0                         0%