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) | Barrie
WPCC |
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 | 9.04 | 6.28E-04 | 5.02E-04 | 4.19E-04 | 3.59E-04 | 3.14E-04 | 2.79E-04 | 2.51E-04 |
|
200 | 18.09 | 1.26E-03 | 1.00E-03 | 8.37E-04 | 7.18E-04 | 6.28E-04 | 5.58E-04 | 5.02E-04 |
| 300 | 27.13 | 1.88E-03 | 1.51E-03 | 1.26E-03 | 1.08E-03 | 9.42E-04 | 8.37E-04 | 7.54E-04 |
| 400 | 36.18 | 2.51E-03 | 2.01E-03 | 1.67E-03 | 1.44E-03 | 1.26E-03 | 1.12E-03 | 1.00E-03 |
| 500 | 45.22 | 3.14E-03 | 2.51E-03 | 2.09E-03 | 1.79E-03 | 1.57E-03 | 1.40E-03 | 1.26E-03 |
| 600 | 54.26 | 3.77E-03 | 3.01E-03 | 2.51E-03 | 2.15E-03 | 1.88E-03 | 1.67E-03 | 1.51E-03 |
| 700 | 63.31 | 4.40E-03 | 3.52E-03 | 2.93E-03 | 2.51E-03 | 2.20E-03 | 1.95E-03 | 1.76E-03 |
| 800 | 72.35 | 5.02E-03 | 4.02E-03 | 3.35E-03 | 2.87E-03 | 2.51E-03 | 2.23E-03 | 2.01E-03 |
| 900 | 81.40 | 5.65E-03 | 4.52E-03 | 3.77E-03 | 3.23E-03 | 2.83E-03 | 2.51E-03 | 2.26E-03 |
| 1000 | 90.44 | 6.28E-03 | 5.02E-03 | 4.19E-03 | 3.59E-03 | 3.14E-03 | 2.79E-03 | 2.51E-03 |
| 1500 | 135.66 | 9.42E-03 | 7.54E-03 | 6.28E-03 | 5.38E-03 | 4.71E-03 | 4.19E-03 | 3.77E-03 |
| 2000 | 180.88 | 0.01 | 0.01 | 8.37E-03 | 7.18E-03 | 6.28E-03 | 5.58E-03 | 5.02E-03 |
| 2500 | 226.10 | 0.02 | 0.01 | 0.01 | 8.97E-03 | 7.85E-03 | 6.98E-03 | 6.28E-03 |
| 3000 | 271.32 | 0.02 | 0.02 | 0.01 | 0.01 | 9.42E-03 | 8.37E-03 | 7.54E-03 |
| 3500 | 316.54 | 0.02 | 0.02 | 0.01 | 0.01 | 0.01 | 9.77E-03 | 8.79E-03 |
| 4000 | 361.76 | 0.03 | 0.02 | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 |
| 4500 | 406.98 | 0.03 | 0.02 | 0.02 | 0.02 | 0.01 | 0.01 | 0.01 |
| 5000 | 452.20 | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 | 0.01 | 0.01 |
| 5500 | 497.42 | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 | 0.02 | 0.01 |
| 6000 | 542.64 | 0.04 | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 | 0.02 |
| 6500 | 587.86 | 0.04 | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 | 0.02 |
| 7000 | 633.08 | 0.04 | 0.04 | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 |
| 7500 | 678.30 | 0.05 | 0.04 | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 |
| 8000 | 723.52 | 0.05 | 0.04 | 0.03 | 0.03 | 0.03 | 0.02 | 0.02 |
| 8500 | 768.74 | 0.05 | 0.04 | 0.04 | 0.03 | 0.03 | 0.02 | 0.02 |
| 9000 | 813.96 | 0.06 | 0.05 | 0.04 | 0.03 | 0.03 | 0.03 | 0.02 |
| 9500 | 859.18 | 0.06 | 0.05 | 0.04 | 0.03 | 0.03 | 0.03 | 0.02 |
| 10000 | 904.40 | 0.06 | 0.05 | 0.04 | 0.04 | 0.03 | 0.03 | 0.03 |
| 15000 | 1356.60 | 0.09 | 0.08 | 0.06 | 0.05 | 0.05 | 0.04 | 0.04 |
| 20000 | 1808.80 | 0.13 | 0.10 | 0.08 | 0.07 | 0.06 | 0.06 | 0.05 |
| 25000 | 2261.00 | 0.16 | 0.13 | 0.10 | 0.09 | 0.08 | 0.07 | 0.06 |
| 30000 | 2713.20 | 0.19 | 0.15 | 0.13 | 0.11 | 0.09 | 0.08 | 0.08 |
| 35000 | 3165.40 | 0.22 | 0.18 | 0.15 | 0.13 | 0.11 | 0.10 | 0.09 |
| 40000 | 3617.60 | 0.25 | 0.20 | 0.17 | 0.14 | 0.13 | 0.11 | 0.10 |
| 45000 | 4069.80 | 0.28 | 0.23 | 0.19 | 0.16 | 0.14 | 0.13 | 0.11 |
|
50000 | 4522.00 | 0.31 | 0.25 | 0.21 | 0.18 | 0.16 | 0.14 | 0.13 |
* 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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