Attachment C - Stormwater Management Plan - 30-32 Doonella Street_SMP-revA_full (00016826)

RATIONAL METHOD SUMMARY & RAINFALL DATA

Project
Project #

Rainfall IFD Input Data (Australian Rainfall and Runoff

30-32 Doonella Street, Tewantin

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

71, "ly "Ly oT Ts Ls F2 F50 G
52.3 10.25 3.45 94.28 23.64 8.6 44 17.61 0.1
Rainfall Intensity (mm/hr)
DURATION AVERAGE RECURRENCE INTERVAL (years)
(hours) | (minutes) 1 yr 2 yr 5 yr 10 yr 20 yr 50 yr 100 yr
0.083 5 129 164 202 223 253 291 321
0.1 6 121 154 190 210 238 274 302
0.167 10 100 127 156 173 196 227 250
0.25 15 84 106 131 146 165 191 211
0.333 20 73 93 115 128 145 168 185
0.417 25 65 83 103 115 130 151 167
0.5 30 59 76 94 105 119 138 153
0.75 45 47.8 61 76 85 97 112 124
1 60 40.8 52 65 72 83 96 106
1.5 90 31.2 40.1 51 57 66 77 86
2 120 25.8 33.3 42.7 48.3 56 66 74
3 180 19.6 25.4 33.2 38.0 44.2 53 59
45 270 14.9 19.4 25.8 29.8 34.9 41.9 47.3
6 360 12.2 16.1 21.6 25.0 29.5 35.6 40.4
9 540 9.31 12.3 16.8 19.7 23.4 28.4 32.5
12 720 7.67 10.2 14.1 16.6 19.8 24.2 27.8
18 1080 6.06 8.06 11.2 13.3 15.9 19.5 22.5
24 1440 5.13 6.83 9.56 11.3 13.6 16.8 19.3
30 1800 4.49 5.99 8.42 10.0 12.0 14.8 17.1
36 2160 4.02 5.37 7.56 9.00 10.8 13.4 15.5
48 2880 3.35 4.49 6.36 7.59 9.16 11.4 13.1
72 4320 2.55 3.42 4.89 5.86 7.10 8.83 10.2
Catchment Data
Details: Existing
Variable Value Units
Area: 0.253 ha
Cro 0.70 fraction
Rational Method Summary
Adopted Time of Concentration (tc) 5.00 __ Minutes (or 0.08 hours)

Variable

T
Intens

actor
mm/hr.

Discharge (m*/s

129
0.05

AVERAGE RECURRENCE INTERVAL

164
0.07

202
0.09

223
0.11

253
0.13

291
0.16

C:\Users\Brendon\Documents\WORK\02 Projects\01 Aquaintel\30 30-32 Doonella Street SMP\Design\WBNM\Rational_Method_30-32 Doonella St

 

8/11/2015