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Calculate Storage Volume of Retention/Detention Pond By Double-end Area Method:

(Note: All input Metric units are converted to English units for the equations below and then the output English units are converted back to Metric)
Elevation of pond bottom (ELb - ft or m)
Water surface elevation (ELt - ft or m)
Surface area of pond bottom (SAb - SF or m^2)
Area of water surface (SAt - SF or m^2)
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D =
V =

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