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20220214 12 Wyandra St SWMP

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DRAINS Modelling Results
Project number:     20220214                                                                 Calculations:         B. Parry
Street Address:     12 Wyandra St
Locality:           Noosa Heads, NSC                                                         Date:                 5/09/2022




Pre / Post Comparison

                                 3                        3                  3
A.E.P                   Qy Pre (m /s)           Qy Post (m /s)     Qchange (m /s)            Qchange (%)
          63.2% AEP                     0.021              0.022                    0.001                     5%
            50% AEP                     0.023              0.025                    0.002                     9%
              0.2 EY                    0.035              0.039                    0.004                    11%
            10% AEP                     0.045              0.046                    0.001                     2%
             5% AEP                     0.052              0.052                    0.000                     0%
             2% AEP                     0.060              0.060                    0.000                     0%
             1% AEP                     0.065              0.066                    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/
          63.2% AEP                     0.021              0.021                     0.000                    0%               2x2kL slimline tanks / attenuation storage
            50% AEP                     0.023              0.023                     0.000                    0%               Total Area                            2.31 m²
            20% AEP                     0.035              0.033                    -0.002                   -6%               Low flow orifice                        61 mm
            10% AEP                     0.045              0.041                    -0.004                   -9%                                                       43 mm/tank
             5% AEP                     0.052              0.051                    -0.001                   -2%               Overflow                               100 mm
             2% AEP                     0.060              0.060                     0.000                    0%               Tank Height                           1.86 m
             1% AEP                     0.065              0.065                     0.000                    0%               Overlow height                        1.76 m
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