The design of a detention facility with a permanent pool shall
include the determination of the proposed site's ability to support
a viable permanent pool. The design shall take into account for such
factors as the required rate and quality of dry weather inflow, the
quality of stormwater inflow, seasonal and longer term variations
in groundwater table, and effects of suspected pollutant loadings.
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Q = (0.40 x h x 2)/L
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Where:
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Q
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=
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Flow in cubic feet per second (CFS)
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h
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=
|
Height of ponding in basin (feet)
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w
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=
|
Width of stone structure (feet)
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L
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=
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Average structure thickness (top of berm + bottom of berm)/2
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