Examples of the estimated runoff volume reduction for a stormwater reuse storage system sized for the average storm event runoff volume
Link to this table

Hydrologic Soil Group (HSG) Watershed Area (acre) Watershed Imperviousness (%) Average Storm Event Runoff Volume (acre-ft)1 Average Annual Runoff Volume Reduction2
B 10 10 0.05 21.4
30 0.10 26.4
50 0.16 24.0
70 0.21 21.9
90 0.26 21.3

1 - Based on 50-year P8 model run from January 1, 1955 through December 31, 2004 utilizing MSP climate data 2 - Assumes stormwater storage volume for reuse equivalent to the average storm event runoff volume and that the application area is sufficient to handle an irrigation application rate of 1"/week over the application area & irrigation period from May through September

This page was last modified on 17 September 2013, at 11:20.

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