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Talk:Infiltration
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Revision as of 21:35, 18 March 2018
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|100 - 1000 m<sup>2</sup>||1.5||3||10
|100 - 1000 m<sup>2</sup>||1.5||3||10
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===Example===
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Where the mean infiltration rate measured at the proposed bottom elevation of the BMP is 30 mm/hr, and the mean infiltration rate measured in an underlying soil horizon within 1.5 m of the bottom is 12 mm/h:
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:<math>ratio=\frac{q_{bottom}}{min\ q_{within 1.5m}}\ =\ \frac{30}{12}\ =2.5</math>
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From the table the SCF is 3.5, and the design infiltration rate can be calculated:
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:<math>q'=\frac{q}{SCF}\ =\ \frac{30}{3.5}=\ 8.6\ mm/hr</math>
Jenny Hill
8,255
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