Vegetated Filter Strip System
Design Manual
Design Tables
Table 6.1 Maximum Runoff Storage/Setting Volume
Using Conservative Method (m3),
25-Year, 24-hr Storm, Holding 100%
Area of Runoff Collection
Area
(m2) |
Oshawa WPCP |
Storage/
Settling Volume*
(m3)
|
Discharge Rate for
following Retention Periods |
4
hr
(m3/s)
|
5 hr
(m3/s)
|
6 hr
(m3/s)
|
7 hr
(m3/s)
|
8 hr
(m3/s)
|
9 hr
(m3/s)
|
10 hr
(m3/s)
|
| 100 |
6.91 |
4.80E-04 |
3.84E-04 |
3.20E-04 |
2.74E-04 |
2.40E-04 |
2.13E-04 |
1.92E-04 |
| 200 |
13.81 |
9.59E-04 |
7.67E-04 |
6.39E-04 |
5.48E-04 |
4.80E-04 |
4.26E-04 |
3.84E-04 |
| 300 |
20.72 |
1.44E-03 |
1.15E-03 |
9.59E-04 |
8.22E-04 |
7.19E-04 |
6.39E-04 |
5.76E-04 |
| 400 |
27.63 |
1.92E-03 |
1.53E-03 |
1.28E-03 |
1.10E-03 |
9.59E-04 |
8.53E-04 |
7.67E-04 |
| 500 |
34.53 |
2.40E-03 |
1.92E-03 |
1.60E-03 |
1.37E-03 |
1.20E-03 |
1.07E-03 |
9.59E-04 |
| 600 |
41.44 |
2.88E-03 |
2.30E-03 |
1.92E-03 |
1.64E-03 |
1.44E-03 |
1.28E-03 |
1.15E-03 |
| 700 |
48.35 |
3.36E-03 |
2.69E-03 |
2.24E-03 |
1.92E-03 |
1.68E-03 |
1.49E-03 |
1.34E-03 |
| 800 |
55.25 |
3.84E-03 |
3.07E-03 |
2.56E-03 |
2.19E-03 |
1.92E-03 |
1.71E-03 |
1.53E-03 |
| 900 |
62.16 |
4.32E-03 |
3.45E-03 |
2.88E-03 |
2.47E-03 |
2.16E-03 |
1.92E-03 |
1.73E-03 |
| 1000 |
69.07 |
4.80E-03 |
3.84E-03 |
3.20E-03 |
2.74E-03 |
2.40E-03 |
2.13E-03 |
1.92E-03 |
| 1500 |
103.60 |
7.19E-03 |
5.76E-03 |
4.80E-03 |
4.11E-03 |
3.60E-03 |
3.20E-03 |
2.88E-03 |
| 2000 |
138.13 |
9.59E-03 |
7.67E-03 |
6.39E-03 |
5.48E-03 |
4.80E-03 |
4.26E-03 |
3.84E-03 |
| 2500 |
172.66 |
0.01 |
9.59E-03 |
7.99E-03 |
6.85E-03 |
6.00E-03 |
5.33E-03 |
4.80E-03 |
| 3000 |
207.20 |
0.01 |
0.01 |
9.59E-03 |
8.22E-03 |
7.19E-03 |
6.39E-03 |
5.76E-03 |
| 3500 |
241.73 |
0.02 |
0.01 |
0.01 |
9.59E-03 |
8.39E-03 |
7.46E-03 |
6.71E-03 |
| 4000 |
276.26 |
0.02 |
0.02 |
0.01 |
0.01 |
9.59E-03 |
8.53E-03 |
7.67E-03 |
| 4500 |
310.79 |
0.02 |
0.02 |
0.01 |
0.01 |
0.01 |
9.59E-03 |
8.63E-03 |
| 5000 |
345.33 |
0.02 |
0.02 |
0.02 |
0.01 |
0.01 |
0.01 |
9.59E-03 |
| 5500 |
379.86 |
0.03 |
0.02 |
0.02 |
0.02 |
0.01 |
0.01 |
0.01 |
| 6000 |
414.39 |
0.03 |
0.02 |
0.02 |
0.02 |
0.01 |
0.01 |
0.01 |
| 6500 |
448.92 |
0.03 |
0.02 |
0.02 |
0.02 |
0.02 |
0.01 |
0.01 |
| 7000 |
483.46 |
0.03 |
0.03 |
0.02 |
0.02 |
0.02 |
0.01 |
0.01 |
| 7500 |
517.99 |
0.04 |
0.03 |
0.02 |
0.02 |
0.02 |
0.02 |
0.01 |
| 8000 |
552.52 |
0.04 |
0.03 |
0.03 |
0.02 |
0.02 |
0.02 |
0.02 |
| 8500 |
587.05 |
0.04 |
0.03 |
0.03 |
0.02 |
0.02 |
0.02 |
0.02 |
| 9000 |
621.59 |
0.04 |
0.03 |
0.03 |
0.02 |
0.02 |
0.02 |
0.02 |
| 9500 |
656.12 |
0.05 |
0.04 |
0.03 |
0.03 |
0.02 |
0.02 |
0.02 |
| 10000 |
690.65 |
0.05 |
0.04 |
0.03 |
0.03 |
0.02 |
0.02 |
0.02 |
| 15000 |
1035.98 |
0.07 |
0.06 |
0.05 |
0.04 |
0.04 |
0.03 |
0.03 |
| 20000 |
1381.30 |
0.10 |
0.08 |
0.06 |
0.05 |
0.05 |
0.04 |
0.04 |
| 25000 |
1726.63 |
0.12 |
0.10 |
0.08 |
0.07 |
0.06 |
0.05 |
0.05 |
| 30000 |
2071.95 |
0.14 |
0.12 |
0.10 |
0.08 |
0.07 |
0.06 |
0.06 |
| 35000 |
2417.28 |
0.17 |
0.13 |
0.11 |
0.10 |
0.08 |
0.07 |
0.07 |
| 40000 |
2762.60 |
0.19 |
0.15 |
0.13 |
0.11 |
0.10 |
0.09 |
0.08 |
| 45000 |
3107.93 |
0.22 |
0.17 |
0.14 |
0.12 |
0.11 |
0.10 |
0.09 |
| 50000 |
3453.25 |
0.24 |
0.19 |
0.16 |
0.14 |
0.12 |
0.11 |
0.10 |
* Storage/settling volume calculated using 25-year/5-minute storm event
rainfall amounts over a 15-minute retention period for selected Ontario
centres obtained from Atmospheric Environment Service, Environment Canada
"Rainfall Intensity-Duration Frequency (IDF) Data."
Runoff coefficient of 95 percent has been used, meaning that 95 per cent
of the rainfall entering the runoff collection area can be expected to
enter the VFS system.
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