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Engineering Hydrology Plans (IWMP)
Plans and drawings
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Log in to see the plans as drawn RATIONAL METHOD SUMMARY & RAINFALL DATA
Project Coles Tavern Development
Project #
Rainfall IFD Input Data (Australian Rainfall and Runoff)
2 2 2 50 50 50
I1 I12 I72 I1 I12 I72 F2 F50 G
52.48 10.17 3.44 94.41 23.2 8.51 4.4 17.62 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 5 130 165 202 223 253 292 321
0.1 6 122 155 190 210 238 275 302
0.167 10 100 127 157 173 197 227 250
0.25 15 84 106 132 146 166 192 211
0.333 20 73 93 115 128 145 168 186
0.417 25 66 83 103 115 131 151 167
0.5 30 60 76 94 105 119 138 153
0.75 45 48.0 61 76 85 97 112 124
1 60 40.9 52 65 73 83 96 106
1.5 90 31.3 40.2 51 57 66 77 86
2 120 25.8 33.3 42.6 48.2 56 66 73
3 180 19.6 25.4 33.1 37.8 43.9 52 59
4.5 270 14.8 19.4 25.7 29.5 34.6 41.4 46.8
6 360 12.2 16.0 21.4 24.8 29.2 35.2 39.9
9 540 9.26 12.2 16.6 19.4 23.0 28.0 31.9
12 720 7.62 10.1 13.9 16.3 19.5 23.8 27.2
18 1080 6.03 8.01 11.1 13.1 15.7 19.2 22.0
24 1440 5.11 6.79 9.47 11.2 13.4 16.5 19.0
30 1800 4.47 5.96 8.34 9.88 11.9 14.6 16.8
36 2160 4.00 5.34 7.50 8.90 10.7 13.2 15.2
48 2880 3.34 4.47 6.31 7.52 9.06 11.2 12.9
72 4320 2.54 3.41 4.86 5.81 7.03 8.74 10.1
Catchment Data
Details: Catchment area draining to Outlet 1
Variable Value Units
Area: 2.01 ha
C10 0.87 fraction
Rational Method Summary
Adopted Time of Concentration (tc) 6.00 Minutes (or 0.10 hours)
AVERAGE RECURRENCE INTERVAL (years)
Variable 1 yr 2 yr 5 yr 10 yr 20 yr 50 yr 100 yr
Freq Factor 0.80 0.85 0.95 1.00 1.05 1.15 1.20
Intensity (mm/hr) 121.86 154.55 189.99 210.10 238.08 274.53 302.20
Discharge (m3/s) 0.5 0.639 0.9 1.021 1.2 1.5 1.763
C:\Users\Brendon\Documents\WORK\02 Projects\10 Coles Noosa SMP\Design\Hydrology\Rational_Method 5/8/2013
[OCR of page images]
RATIONAL METHOD SUMMARY & RAINFALL DATA
Project
Project #
Rainfall IFD Input Data (Australian Rainfall and Runoff;
Coles Tavern Development
1, om 2 50, 5p 5, F2 F50 G
52.48 10.17 3.44 94.41 23.2 8.51 4.4 17.62 0.1
Rainfall Intensity (mm/hr)
DURATION AVERAGE RECURRENCE INTERVAL (years)
(hours) | (minutes) 1 yr 2yr 5 yr 10 yr 20 yr 50 yr 100 yr
0.083 5 130 165 202 223 253 292 321
0.1 6 122 155 190 210 238 275 302
0.167 10 100 127 157 173 197 227 250
0.25 15 84 106 132 146 166 192 211
0.333 20 73 93, 115 128 145 168 186
0.417 25 66 83 103 115 131 151 167
0.5 30 60 76 94 105. 119 138 153
0.75 45 48.0 61 76 85 97 112 124
1 60 40.9 52 65 73 83 96 106
1.5 90 31.3 40.2 51 57 66 77 86
2 120 25.8 33.3 42.6 48.2 56 66 73
3 180 19.6 25.4 33.1 37.8 43.9 52 59
4.5 270 14.8 19.4 25.7 29.5 34.6 41.4 46.8
6 360 12.2 16.0 21.4 24.8 29.2 35.2 39.9
9 540 9.26 12.2 16.6 19.4 23.0 28.0 31.9
12 720 7.62 10.1 13.9 16.3 19.5 23.8 27.2
18 1080 6.03 8.01 111 13.1 15.7 19.2 22.0
24 1440 5.11 6.79 9.47 11.2 13.4 16.5 19.0
30 1800 4.47 5.96 8.34 9.88 11.9 14.6 16.8
36 2160 4.00 5.34 7.50 8.90 10.7 13.2 15.2
48 2880 3.34 4.47 6.31 7.52 9.06 11.2 12.9
72 4320 2.54 3.41 4.86 5.81 7.03 8.74 10.1
Catchment Data
Details: | Catchment area draining to Outlet 1
Variable Value Units
Area: 2.01 ha
Cio 0.87 fraction
Rational Method Summary
Adopted Time of Concentration (tc) 6.00 _ Minutes (or 0.10 hours)
AVERAGE RECURRENCE INTERVAL (years)
Variable Tyr 2 yr 5 yr 10 yr 20 yr 50 yr 100 yr
Freq Factor 0.80 0.85 0.95 1.00 1.05 1.15 1.20
Intensity (mm/hr) 121.86 154.55 189.99 210.10 238.08 274.53 302.20
Discharge (m*/s) 0.5 0.639 0.9 1.021 1.2 15 1.763
C,\Users\Brendon\Documents\WORK\02 Projects\10 Coles Noosa SMP\Design\Hydrology\Rational_Method
5/8/2013
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