RFI - RECOR Preliminary Stormwater Management Report - 20220078

DRAINS Modelling Results
Project number:     20220078                                                            Calculations:               B. Parry
Street Address:     6 Wyandra Street
Locality:           Noosa Heads, Noosa Shire Council                                    Date:                       24/06/2022




                                             Wyandra Street
       A.E.P                                                                                    Qchange (%)
                        Qexisting (m³/s)     Qproposed (m³/s)      Qchange (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%




                                             Wyandra Street
       A.E.P                                                                                    Qchange (%)
                        Qexisting (m³/s)     Qmitigated (m³/s)     Qchange (m³/s)                                                Prelim Attenuation Sizing
                 1EY                 0.016                0.015               -0.001                          -6%                Slimline 4,000L
                50%                  0.019                0.017               -0.002                      -11%                   Surface Area                      2.5515
               0.2 EY                0.028                0.025               -0.003                      -11%                   2.15m total height
                10%                  0.036                  0.03              -0.006                      -17%                   53mm low flow outlet at base
                  5%                 0.041                0.037               -0.004                      -10%                   100mm high flow outlet at 2.05m
                  2%                 0.047                0.045               -0.002                          -4%
                  1%                 0.051                0.051                     0                         0%