RFI - Stormwater Management Plan

RIP CALCULATIONS

IFD TABLE

Location

Label: Not provided
Latitude: -26.3951 [Nearest grid cell: 26.3875 (S)]

Longitude:153.0854 [Nearest grid cell: 153.0875
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IFD Design Rainfall Intensity (mm/h) Issued: 05 October 2022

Rainfall intensity for Durations, Exceedance per Year (EV), and Annual Exceedance Probabilities (AEP).

FAQ for New ARR probability terminology

Table | [ chart | unit: Gav

 

 

63.2%  SO%#  20%* 2% 1%
172 194 262 307 349 404 ade
146 166 229 272 314 372 417
137 156 214 253 292 346 384
131 148 202 238 274 320 355
125 141 192 226 258 300 332
102 115 155 180 205 235 258

86.5 97.6 131 153 173 189 217
75.5 85.2 115 134 152 175 191
67.4 76.1 103 120 136 157 173
61.0 68.9 93.2 109 124 144 158
48.3 34.7 74.6 87.8 101 117 130
40.6 46.1 63.3 74.9 86.2 101 113

31.5 36.0 50.0 39.6 69.0 81.8 91.6
26.3 30.1 42.2 50.6 58.9 70.2 73.0
20.4 23.5 33.3 40.2 47.2 56.6 64.0
15.9 18.4 26.4 32.1 37.8 45.6 S17
13.3 15.5 22.4 27,3 32.3 39.2 44.4
10.4 12.1 17.8 21.8 25.8 31.4 35.8
8.75 10.2 15.1 18.5 22.0 26.8 30.7
6.82 7.99 11.9 14.6 17.5 214 24.5
5.69 6.68 9.94 12.3 14.8 18,1 20.9
4.93 5.78 8.63 10.7 12.9 15.9 18.3
4.37 5.12 7.66 9.53 11.5 14.2 16.4
3.58 4.20 6.30 7.86 9.50 11.8 13.8
2.67 3.13 4.70 5.88 7.15 8.98 10.5
2.15 2.51 3.77 4.73 5.76 7.27 8.53
120 hour 1.80 2.11 3.16 3.96 4.83 6.10 7.16
144 hour 1.56 1.82 2.72 3.41 4.16 5.24 6.15
168 hour 1,38 1.61 2.40 3.00 3.65 4.59 5.37