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

Estimated iimpact of stormwater reuse for irrigation on average annual runoff reduction
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Hydrologic Soil Group (HSG)	Watershed Area (acre)	Watershed Imperviousness (%)	Average Annual Runoff Volume^{1 (acre-ft)}	Range of Average Annual Runoff Volume Reduction² (%)
X	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}