Stormwater Management Plan · MCU22/0058

DRAINS Modelling Results
Project number:     20220078                                                          Calculations:               B. Parry
Street Address:     6 Wyandra Street
Locality:           Noosa Heads, Noosa Shire Council                                  Date:                       29/03/2022




                                             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                0.021              0.002                          11%
               0.2 EY                0.028                0.031              0.003                          11%
                 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                      2.4
               0.2 EY                0.028                0.024              -0.004                     -14%                   1.86 inlet height
                 10%                 0.036                0.031              -0.005                     -14%                   1.86 total height
                  5%                 0.041                0.038              -0.003                      -7%                   53mm low flow outlet at base
                  2%                 0.047                0.047                   0                       0%                   100mm high flow outlet at 1.76m
                  1%                 0.051                0.051                   0                       0%