RECOR Preliminary Stormwater Management Report - 20220198

DRAINS Modelling Results
Project number:    20220198                                                                 Calculations:          B. Parry
Street Address:    3 Delorme St
Locality:          Noosa Heads, NSC                                                         Date:                  19/08/2022




Pre / Post Comparison (To Delorme St)


A.E.P                 Qy Pre (m3/s)             Qy Post (m3/s) Qchange (m3/s)               Qchange (%)
          63.2% AEP                     0.021             0.024                    0.003                    14%
           50% AEP                      0.025             0.028                    0.003                    12%
           20% AEP                      0.039             0.041                    0.002                     5%
           10% AEP                      0.045             0.050                    0.005                    11%
             5% AEP                     0.057             0.057                    0.000                     0%
             2% AEP                     0.065             0.065                    0.000                     0%
             1% AEP                     0.071             0.072                    0.001                     1%




Pre / Post w/ OSD Comparison (To Delorme St)                                                                                    Tank Node Assumptions
A.E.P               Qy Pre (m3/s)          Qy Post (m3/s)         Qchange (m3/s)            Qchange (%)                         https://kingspanwatertanks.com.au/product/3000-litre-slimline-tank/
          63.2% AEP                     0.021             0.021                     0.000                     0%                2x3kL slimline tanks
           50% AEP                      0.025             0.024                    -0.001                    -4%                Total Area                         3.5 m²
           20% AEP                      0.039             0.033                    -0.006                   -15%                Low flow orifice                    81 mm
           10% AEP                      0.045             0.041                    -0.004                    -9%                                                    57 mm/tank
             5% AEP                     0.057             0.049                    -0.008                   -14%                Overflow                          100 mm
             2% AEP                     0.065             0.063                    -0.002                    -3%                Tank Height                       1.86 m
             1% AEP                     0.071             0.071                     0.000                     0%                Overlow height                    1.76 m