Swmp

DRAINS Modelling Results
Project number:     20220116                                                                 Calculations:          B. Parry
Street Address:     206 David Low Way
Locality:           Peregian Beach, NSC                                                      Date:                  17/03/2023




Pre / Post Comparison

                                 3                        3                  3
A.E.P                   Qy Pre (m /s)           Qy Post (m /s)     Qchange (m /s)            Qchange (%)
                1 EY                    0.014              0.015                     0.001                    7%
            50% AEP                     0.016              0.018                     0.002                   13%
              0.2 EY                    0.024              0.026                     0.002                    8%
            10% AEP                     0.031              0.031                     0.000                    0%
             5% AEP                     0.035              0.036                     0.001                    3%
             2% AEP                     0.041              0.041                     0.000                    0%
             1% AEP                     0.046              0.045                    -0.001                   -2%




Pre / Post w/ OSD Comparison                                                                                                     Tank Node Assumptions
                              3                           3                  3
A.E.P                Qy Pre (m /s)              Qy Post (m /s)     Qchange (m /s)            Qchange (%)                         https://kingspanwatertanks.com.au/product/2000-litre-skinny-slimline-water-tank/
                1 EY                    0.014              0.013                    -0.001                    -7%                2x2kL slimline tanks
            50% AEP                     0.016              0.014                    -0.002                   -13%                Total Area                         2.31 m²
              0.2 EY                    0.024              0.021                    -0.003                   -13%                Low flow orifice                     50 mm
            10% AEP                     0.031              0.027                    -0.004                   -13%                                                     35 mm/tank
             5% AEP                     0.035              0.033                    -0.002                    -6%                Overflow                            100 mm
             2% AEP                     0.041              0.040                    -0.001                    -2%                Tank Height                        1.86 m
             1% AEP                     0.046              0.044                    -0.002                    -4%                Overlow height                     1.76 m