Estimated iimpact of stormwater reuse for irrigation on average annual runoff reduction

Estimated iimpact of stormwater reuse for irrigation on average annual runoff reduction
Link to this table

Hydrologic Soil Group (HSG)	Watershed Area (acre)	Watershed Imperviousness (%)	Average Annual Runoff Volume1 (acre-ft)	Range of Average Annual Runoff Volume Reduction2 (%)
A	10	10	2.3	6.0	98.3
	10	30	6.2	2.2	93.6
	10	50	10.2	1.4	86.2
	10	70	14.1	1.0	80.6
	10	90	18.1	0.8	76.7
B	10	10	3.2	4.3	91.7
	10	30	6.9	2.0	88.2
	10	50	10.7	1.3	83.3
	10	70	14.4	1.0	79.3
	10	90	18.2	0.8	76.4
C	10	10	3.9	3.5	87.6
	10	30	7.5	1.9	85.4
	10	50	11.1	1.3	81.8
	10	70	14.7	1.0	78.6
	10	90	18.3	0.8	76.2
D	10	10	4.7	2.9	84.6
	10	30	8.1	1.7	83.2
	10	50	11.5	1.2	80.5
	10	70	14.9	0.9	78.1
	10	90	18.4	0.8	76.0

^{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 one week demand for irrigation water assuming an application rate of 1"/week over the application area & irrigation period from May through September}