Precipitation Design
|
Width of Greenbelt (m)
|
Precipitation
(mm)
|
Runoff Volume (mm)
|
Runoff Volume (mm)
|
Runoff Coeff. (%)
|
Runoff Coeff. (%)
|
Peak Runoff
(m3 s-1)
|
Peak Runoff
(m3 s-1)
|
|
|
|
GRS |
IGRS |
GRS |
IGRS |
GRS |
IGRS |
2yr |
1 |
30 |
16.00 |
15.98 |
53.03 |
52.97 |
1.45 |
1.73 |
|
2 |
|
16.00 |
15.95 |
53.03 |
52.87 |
1.47 |
1.77 |
|
3 |
|
15.85 |
15.80 |
52.54 |
52.37 |
1.45 |
1.74 |
10-yr |
1 |
46 |
28.83 |
28.78 |
62.31 |
62.20 |
2.84 |
3.79 |
|
2 |
|
28.88 |
28.85 |
62.42 |
62.35 |
2.88 |
3.88 |
|
3 |
|
28.70 |
28.65 |
62.03 |
61.92 |
2.86 |
3.86 |
100yr |
1 |
70 |
49.71 |
49.73 |
70.40 |
70.43 |
5.06 |
7.11 |
|
2 |
|
49.73 |
49.73 |
70.43 |
70.43 |
5.13 |
7.27 |
|
3 |
|
49.50 |
49.48 |
70.10 |
70.08 |
5.10 |
7.23 |