17 Bottlebrush Avenue, · MCU26/0001

REC:-R

Ration Method Results

 

 

Catchment Area (m2) Actual Tc
505.71 7

505.71 7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AEP % 63.20% 50% 20% 10% 5% 2% 1%
Pre Development 0.010 0.012 0.018 0.022 0.026 0.033 0.037]
Post Dev1 0.013 0.015 0.020 0.024) 0.027 0.031 0.035
Annual Exceedance
Probability (AEP)
Duration 63.20% 50%# 20%* 10% 5% 2% 1%
1 min 172 194 262 307 349 404 444
2 min 146 166 229 272 314 372 417
3 min 137 156 214 253 292 344 384
4 min 131 148 202 238 274 320 355
5 min 125 141 192 226 258 300 332
7 min 114 129 175 205 233 269 295
9 min 106 119 161 188 213 245 269
10 min 102 115 155 180 205 235 258
15 min 86.5 97.6 131 153 173 199 217
20 min PAD EE 85.2 115 134 152 175 191
25 min 67.4 76.1 103 120 136 157 173
30 min 61 68.9 93.2 109 124 144 158
45 min 48.3 54.7 74.6 87.8 101 117 130
1 hour 40.6 46.1 63.3 74.9 86.2 101 113
1.5 hour 31.5 36 50 59.6 69 81.8 91.6
2 hour 26.3 30.1 42.2 50.6 58.9 70.2 79
3 hour 20.4 23.5 33.3 40.2 47.2 56.6 64
4.5 hour rns) 18.4 26.4 32.1 37.8 45.6 51.7
6 hour 13.3 15.5 22.4 27.3 32.3 39.1 44.4
9 hour 10.4 12.1 17.8 21.8 25.8 31.4 35.8
12 hour 8.75 10.2 15.1 18.5 22 26.8 30.7
18 hour 6.82 7.99 11.9 14.6 17.5 21.4 24.5
24 hour 5.69 6.68 9.94 12.3 14.8 18.1 20.9
30 hour 4.93 5.78 8.63 10.7 12.9 rns) 18.3
36 hour 4.37 5.12 7.66 9.53 11.5 14.2 16.4
48 hour 3.58 4.2 6.3 7.86 9.5 11.8 13.8
72 hour 2.67 3.13 4.7 5.88 7.15 8.98 10.5
96 hour Les 2.51 3.77 4.73 5.76 7.27 8.53
120 hour 1.8 2.11 3.16 3.96 4.83 6.1 7.16
144 hour 1.56 1.82 2.72 3.41 4.16 5.24 6.15
168 hour 1.38 1.61 2.4 3 3.65 4.59 5.37