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Development Application part 7 of 10 Stormwater Management Report - MCU13/0092
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Appendix B -
Calculations
Table 8: Discharge Calculation Table
Catchment
Major Storm Event QIOO Minor Storm Event Q20 Treatable Storm Event Q3month
Area
Intensity Discharge Intensity Discharge Intensity Discharge
CatchmentE 0.1743ha 315mm/hr 0.153m3/s 247mm/hr 0.111m3/s 63 mm/hr 0.021 m3/s
Sample Calculations
MINOR STORM EVENT 0100
AREA 0.1743 ha
RAINFALL INTENSITY
1,00 315mm/hr (From AR&R)
For 5 minute duration
COEFICIENT OF RUNOFF
C’OO 1.0
DISCHARGE
Q100 CIA 0.153 m’/s
360
MINOR STORM EVENT 020
AREA 0.1743 ha
RAINFALL INTENSITY
1,0 247mm/hr (From AR&R)
For 5 minute duration
COEFICIENT OF RUNOFF
C’" 0.92
DISCHARGE
Q" CIA 0.111 m’/s
360
TREA TABLE STORM EVENT 03month
AREA 0.1743 ha
RAINFALL INTENSITY
!,month 63mm/hr (From AR&R)
For 5 minute duration
COEFICIENT OF RUNOFF
C’month 0.7
DISCHARGE
Q’month CIA 0.021 m’/s
360
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