Vegetated Filter Strip System Design Manual
Design Tables

Discharge Rate to Infiltration Area Infiltration Area Required Based on Saturated Hydraulic Conductivity of the Following Soil Texture Classes*
Sandy Clay Silty Clay Clay
Table 6.3 Infiltration Area Required Based on Saturated Hydraulic Conductivity of Soil Texture Classes
m3/s gal/min m2 ft2 m2 ft2 m2 ft2
1.00E-04 1.59 300.30 3232.49 400.00 4305.68 602.41 6484.46
2.00E-04 3.17 600.60 6464.98 800.00 8611.36 1204.82 12968.92
3.00E-04 4.76 900.90 9697.48 1200.00 12917.04 1807.23 19453.37
4.00E-04 6.34 1201.20 12929.97 1600.00 17222.72 2409.64 25937.83
5.00E-04 7.93 1501.50 16162.46 2000.00 21528.40 3012.05 32422.29
6.00E-04 9.51 1801.80 19394.95 2400.00 25834.08 3614.46 38906.75
7.00E-04 11.10 2102.10 22627.45 2800.00 30139.76 4216.87 45391.20
8.00E-04 12.68 2402.40 25859.94 3200.00 34445.44 4819.28 51875.66
9.00E-04 14.27 2702.70 29092.43 3600.00 38751.12 5421.69 58360.12
1.00E-03 15.85 3003.00 32324.92 4000.00 43056.80 6024.10 64844.58
1.50E-03 23.78 4504.50 48487.39 6000.00 64585.20 9036.14 97266.87
2.00E-03 31.70 6006.01 64649.85 8000.00 86113.60 12048.19 129689.16
2.50E-03 39.63 7507.51 80812.31 10000.00 107642.00 15060.24 162111.45
3.00E-03 47.55 9009.01 96974.77 12000.00 129170.40 18072.29 194533.73
3.50E-03 55.48 10510.51 113137.24 14000.00 150698.80 21084.34 226956.02
4.00E-03 63.40 12012.01 129299.70 16000.00 172227.20 24096.39 259378.31
4.50E-03 71.33 13513.51 145462.16 18000.00 193755.60 27108.43 291800.60
5.00E-03 79.25 15015.02 161624.62 20000.00 215284.00 30120.48 324222.89
5.50E-03 87.18 16516.52 177787.09 22000.00 236812.40 33132.53 356645.18
6.00E-03 95.10 18018.02 193949.55 24000.00 258340.80 36144.58 389067.47
6.50E-03 103.03 19519.52 210112.01 26000.00 279869.20 39156.63 421489.76
7.00E-03 110.95 21021.02 226274.47 28000.00 301397.60 42168.67 453912.05
7.50E-03 118.88 22522.52 242436.94 30000.00 322926.00 45180.72 486334.34
8.00E-03 126.80 24024.02 258599.40 32000.00 344454.40 48192.77 518756.63
8.50E-03 134.73 25525.53 274761.86 34000.00 365982.80 51204.82 551178.92
9.00E-03 142.65 27027.03 290924.32 36000.00 387511.20 54216.87 583601.20
9.50E-03 150.58 28528.53 307086.79 38000.00 409039.60 57228.92 616023.49
0.01 158.50 30030.03 323249.25 40000.00 430568.00 60240.96 648445.78
0.02 237.75 45045.05 484873.87 60000.00 645852.00 90361.45 972668.67
0.02 317.00 60060.06 646498.50 80000.00 861136.00 120481.93 1296891.57
0.03 396.26 75075.08 808123.12 100000.00 1076420.00 150602.41 1621114.46
0.03 475.51 90090.09 969747.75 120000.00 1291704.00 180722.89 1945337.35
0.04 554.76 105105.11 1131372.37 140000.00 1506988.00 210843.37 2269560.24
0.04 634.01 120120.12 1292997.00 160000.00 1722272.00 240963.86 2593783.13
0.05 713.26 135135.14 1454621.62 180000.00 1937556.00 271084.34 2918006.02
0.05 792.51 150150.15 1616246.25 200000.00 2152840.00 301204.82 3242228.92
0.06 871.76 165165.17 1777870.87 220000.00 2368124.00 331325.30 3566451.81
0.06 951.01 180180.18 1939495.50 240000.00 2583408.00 361445.78 3890674.70
0.07 1030.26 195195.20 2101120.12 260000.00 2798692.00 391566.27 4214897.59
0.07 1109.51 210210.21 2262744.74 280000.00 3013976.00 421686.75 4539120.48
0.08 1188.77 225225.23 2424369.37 300000.00 3229260.00 451807.23 4863343.37
0.08 1268.02 240240.24 2585993.99 320000.00 3444544.00 481927.71 5187566.27
0.09 1347.27 255255.26 2747618.62 340000.00 3659828.00 512048.19 5511789.16
0.09 1426.52 270270.27 2909243.24 360000.00 3875112.00 542168.67 5836012.05
0.10 1505.77 285285.29 3070867.87 380000.00 4090396.00 572289.16 6160234.94
0.10 1585.02 300300.30 3232492.49 400000.00 4305680.00 602409.64 6484457.83
0.15 2377.53 450450.45 4848738.74 600000.00 6458520.00 903614.46 9726686.75
0.20 3170.04 600600.60 6464984.98 800000.00 8611360.00 1204819.28 12968915.66
0.25 3962.55 750750.75 8081231.23 1000000.00 10764200.00 1506024.10 16211144.58
0.30 4755.06 900900.90 9697477.48 1200000.00 12917040.00 1807228.92 19453373.49
0.35 5547.57 1051051.05 11313723.72 1400000.00 15069880.00 2108433.73 22695602.41
0.40 6340.08 1201201.20 12929969.97 1600000.00 17222720.00 2409638.55 25937831.33
0.45 7132.59 1351351.35 14546216.22 1800000.00 19375560.00 2710843.37 29180060.24
0.50 7925.10 1501501.50 16162462.46 2000000.00 21528400.00 3012048.19 32422289.16

Soil texture class and typical hydraulic conductivity values under saturated soil conditions derived from Rawls et al (1982) for all textures except silt, which is taken from Carsel & Parrish (1988).

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Author: Robert P. Stone, P. Eng., Engineer, Soil/OMAFRA
Creation Date: 04 July 2005
Last Reviewed: 16 August 2007