RFI - P0478-26-001_45_Maple_Street_Cooroy_SWMP

REC:-R

 

Ration Method Results

 

Catchment Area (m2) Actual Tc

3756 14
3756 7

 

 

 

 

AEP % 63.20% 50% 20% 10% 5% 2% 1%
Pre Development 0.050 0.059 0.090 0.110 0.130 0.165 0.188
Post Devi 0.075 0.090 0.135 0.166 0.198 0.251 0.287]

 

 

 

 

 

 

 

 

 

Annual Exceedance
Probability (AEP)

 

 

 

Duration 63.20% 50%# 20%* 10% 5% 2% 1%
1 min 165 186 250 293 333 385 424
2 min 141 159 216 256 295 348 390
3 min 132 149 203 239 275 323 360)
4 min 126 142 192 226 259 303 336
5 min 120 135 183 215 245 285 315)
7 min 110 124 167 195 222 257 282
10 min 97.3 110 148 172 196 225 247
13 min 87.7 98.9 133 155 176 202 221
14 min 84.9 95.8 129 150 170 196 214
15 min 82.3 92.9 125 145 165 190 208)
20 min 71.8 81 109 127 144 166 182
25 min 64 72.2 97.1 113 129 149 164
30 min 58 65.4 88.1 103 117 136 150
45 min 46 51.9 70.3 82.6 94.5 110 122
1 hour 38.7 43.8 59.5 70.2 80.7 94.5 105
1.5 hour 30.2 34.3 47 55.8 64.4 76.1 85.1
2 hour 25.3 28.8 39.8 47.4 55 65.3 73.3)
3 hour 19.8 22.6 31.5 37.8 44.1 52.7 59.4
4.5 hour 15.4 17.7 25.1 30.3 35.5 42.7 48.3
6 hour 13 15 21.4 26 30.5 36.8 41.8
9 hour 10.2 11.8 17.1 20.9 24.7 29.9 34:
12 hour 8.54 9.95 14.6 17.9 21.2 25.8 29.4
18 hour 6.63 7.78 11.5 14.2 17 20.8 23.8
24 hour 5.51 6.48 9.7 12 14.4 17.7 20.4
30 hour 4.75 5.6 8.43 10.5 12.6 15.6 18
36 hour 4.19 4.95 7.48 9.35 11.3 14 16.2
48 hour 3.42 4.04 6.15 7.72 9.37 11.7 13.6
72 hour 2.53 2.99 4.58 5.78 7.06 8.86 10.4
96 hour 2.04 2.4 3.67 4.64 5.69 7.17 8.41
120 hour 1.71 2.02 3.08 3.89 4.78 6.02 7.06

144 hour 1.49 1.75 2.66 3.36 4.12 5.19 6.08)