Stormwater Management Report · MCU19/0008

                          Figure 3 - Ensemble Statistics Utility Results; 10% AEP Event




                          Figure 4 - Ensemble Statistics Utility Results; 1% AEP Event

Table 3 below compares the peak flow rates and total runoff volume for the pre-developed and post-
developed model.

Table 3 - XP Storm Results


                           Median    Peak Flow Rate Off Site (m3/s)              Total Volume Off Site (m3)
               Duration    Storm
 EY/AEP        (min)       Pattern   Pre-developed      Post-developed           Pre-developed    Post-developed
                    10           9                22               10 (-12)               11.37        3.55(-7.83)
   0.5EY            25           6                21                   18 (-3)            19.05      11.16 (-7.89)
                    60           9                18                       18             28.03      19.98 (-8.05)
                    10           3                34                   27 (-7)            16.93       9.16 (-7.77)
 10%AEP             25           3                29                   21 (-8)            28.28      20.32 (-7.96)
                    60           2                26                   21 (-5)            43.55      35.56 (-7.99)
                    10           4                48                   46 (-2)            24.58      16.75 (-7.83)
  1%AEP             25          10                41                   40 (-1)            41.23      33.40 (-7.83)
                    60           7                34                       34             66.77      58.85 (-7.91)



4 April 2019                            Stormwater Management Report                                     8
S18-030                                     22 Arakoon Crescent,