5179Flood Report_REV_3

                                                                                       Callaghan & Toth



              Total:                                       16.4 mins
Adopt: 16 mins.

Q100 = (0.00278 x 1.20 x 0.78 x 200 x 1.80) + [(0.00278 x 1.20 x 0.79 x 200 x 1.47) – 0.46] = 1.25
m3/sec

Q20 = (0.00278 x 1.05 x 0.78 x 158 x 1.80) + [(0.00278 x 1.05 x 0.79 x 158 x 1.47) – 0.46] = 0.72
m3/sec

Q5 = (0.00278 x 0.95 x 0.78 x 128 x 1.80) + [(0.00278 x 0.95 x 0.79 x 128 x 1.47) – 0.46] = 0.48
m3/sec

Q1     = 0.00278 x 0.80 x 0.78 x 79 x 1.83 = 0.25 m3/sec
6.        URBS CATCHMENT FILE – POST DEVELOPMENT
2 Pearson Rd Cooroy - Develop.cat
Model: Basic
Uses: L U I
Default Parameters: alpha=1.20 m=0.8
 14 Subareas of Area:
 0.0011 0.0010 0.0036 0.0032 0.0032 0.0026 0.0024
 0.0023 0.0019 0.0015 0.0054 0.0018 0.0016 0.0011
Factor=1.50
Rain # 1 L=0.030 U=0.00
Route L=0.030 U=0.25
Store.
Rain # 2 L=0.015 U=0.00
Get.
Route L=0.030 U=0.25
Store.
Rain # 3 L=0.020 U=0.20 I=0.55
Get.
Route L=0.045 U=0.20
Store.
Rain # 4 L=0.020 U=0.20 I=0.55
Route L=0.056 U=0.20
Get.
Route L=0.036 U=0.50
Store.
Rain # 5 L=0.030 U=0.25 I=0.55
Store.
Rain # 6 L=0.030 U=0.25 I=0.55
Get.
Get.
Print. TMR1
Loss C=0.46
{Throws away everything up to 0.46 m3/s}
Print.TMR2
Route L=0.078 U=0.00
Store.
Factor=1.0
Rain # 7 L=0.072 U=0.00 I=0.45
Factor=1.5
Add Rain # 8 L=0.036 U=0.20 I=0.55
Store.
Factor=1.0
Rain # 9 L=0.045 U=0.00 I=0.17
Factor=1.5


                                                                                                 J
2035 2 Pearsons Road – Flood Study – Revision 3                                     April 2021