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<br />Part (7) <br /> <br />Restriction on volume pumped limits pumping time to: <br /> <br />. <br /> <br />150 acre-ft/2 acre-ft/day = 75 days. <br /> <br />Test to see if depletion restriction would be exceeded by <br /> <br />.' <br /> <br />75 days of pumping <br /> <br />_tp + .!.! = (150 ~ 50) days = 100 days <br /> <br />(E~ + :!]J:"~ = ~~~ ~:;: = 0.48 <br /> <br />t = 75 days <br />-!: <br />t T/ a" S = 75 days = 0.36 <br />- p- -- 209 days <br /> <br />vT/Qi's'l1 0.72 <br />- - <br /> <br />Jo~s <br /> <br />From Figure 3 : <br /> <br />"'" <br /> <br />v = (0.72) (2 acre-ft) (209 days) <br />day <br /> <br />= 30 acre-ft <br /> <br />which exceeds the 25 acre-ft restriction. <br /> <br />Try stopping pumping after 69 days, using Table 1. <br /> <br />~i = (100-69) days = 31 days <br /> <br />- <br /> <br />(~E. + =ijYt. ~ <br /> <br />Vl, T/Qa" S <br />- -- <br /> <br />tiTj~~ <br /> <br />v"T/Qa"S <br /> <br />Net <br /> <br />Acre-ft <br /> <br />- --- <br /> <br />.. <br /> <br />0.48 <br /> <br />0.070 <br /> <br />0.15 <br /> <br />0.003 <br /> <br />0.067 <br /> <br />28 <br /> <br />try t = 54 days, t. = 46 days <br />_p _1. <br /> <br />0.48 <br /> <br />0.070 <br /> <br />0.22 <br /> <br />0.010 <br /> <br />.060 <br /> <br />25 <br /> <br />Therefore,the irrigator can pump at a rate of 2 acre-ft/day during <br />tne ~-day perIod Deg1.nnlng )U days atter the season beglns. <br /> <br />30 <br />