Laserfiche WebLink
<br />Problem III <br /> <br />A well 4,000 feet from the stream is shut down after pumping <br /> <br />at the rate of 250 ga1/min for 150 days: 1/~ = 66,850 fta/day <br /> <br />(1) what effect did pumping the well have on the stream during the <br /> <br />pumping period; (2) what will be the effect during the next 216 days <br /> <br />after pumping was stopped; and (3) what would the effect have been <br /> <br />if pumping had continued during the entire 366 days? <br /> <br /> ~ = (4000 ft)a = 239 days. <br /> 66850 fta / day <br />Part (1) <br /> t Taa S 150 days 0.63 <br /> = <br /> -p- - 239 days <br /> (250 ga1/min) C440 min) 1 ft" 1 acre-ft 1.1 acre-f~/day <br />Q = (7.48 gal ) (43560 fta) = <br /> day <br /> <br />when <br /> <br />'------ -- <br /> <br />"'T' 1_2 c:' _ " '-':I <br /> <br />.;. ';;p~ -"-- <br /> <br />and from Curve A: <br /> <br />q/Q = 0.37, <br />-- <br /> <br />"'0 <br />~~ <br /> <br />and from Curve B: <br /> <br />!/~ = 0.19. <br /> <br />At the end of 150 days, <br /> <br />q = (1.1 acre-ft/day) (0.37) = 0.41 acre-ft/day <br />- <br /> <br />v = (1.1 acre-ft/day) (150 days) (0.19) = 31 acre-ft. <br /> <br />- <br /> <br />31 <br />