Development Application part 7 of 10 Stormwater Management Report - MCU13/0092

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Appendix B               -
                               Calculations


                                                   Table 9: Discharge Calculation Table



        Catchment             Area
                                          Maior Storm Event Q100          Minor Storm Event Q20     Treatable Storm Event Q3month
                                          Intensit:{  Discharge           Intensi!:l   Discharge     Intensit:{        Discharge

       Catchment A      0.3494 ha        315 mm/hr           0.306 m3/s   247 mm/hr    0.221 m3/s   63 mm/hr           0.043 m3/s
       Catchment B      0.1023 ha        315 mm/hr           0.090 m3/s   247 mm/hr    0.065 m3/s   63 mm/hr           0.013 m3/s
       Catchment C      0.1893 ha        315 mm/hr           0.166 m3/s   247 mm/hr    0.119m3/s    63 mm/hr           0.023 m3/s
       Catchment C      0.0094 ha        315 mm/hr           0.008 m3/s   247 mm/hr    0.006 m3/s   63 mm/hr           0.001 m3/s




Sample Calculations
MINOR STORM EVENT 0100
AREA                                 0.3494ha


RAINFALL INTENSITY
1,00                    315mm/hr     (From AR&R)
For 5 minute duration


COEFICIENT OF RUNOFF
C100                    1.0


DISCHARGE
QlOo                    CIA                     0.306 m3/s
                        360



MINOR STORM EVENT Qzo
AREA                                 0.3494ha


RAINFALL INTENSITY
I"                    247mm/hr (From AR&R)
For 5 minute duration


COEFICIENT OF RUNOFF
C"                      L92


DISCHARGE
Q"                      CIA                     0.090 m3/s
                        360


 TREA TABLE STORM EVENT 03month
AREA                                 0.3494ha


RAINFALL INTENSITY
bmonth                  63mm/hr      (From AR&R)
For 5 minute duration


COEFICIENT OF RUNOFF
C3month                 0.7


DISCHARGE
Q3month                 CIA                     0.043 m3/s
                        360




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