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W <br /> t <br /> 3_ � r <br /> CALCULATIONS <br /> 1. Ground water movement <br /> K = 2 X 10-5CM/sec <br /> K = 0.424 gal/day/ft2 <br /> slope of ground water 10-2-87 = .0046 ft/foot <br /> T = Kb W .424x1 = .42 gal/day/ft2 <br /> Q = TW dh = .42 x 1 x ,0046 = 1.9x10-3 gal/day/ft2 <br /> r UT <br /> V = Q = .0019 =.008 ft/day = 3 ft/yr , <br /> AN 1x.25 <br /> WELL <br /> �- Assume draw down-'of 20' and 5' well loss <br /> Radius of influence <br /> Ro = 3(H-hw) ( .47K)1/2 <br /> Ro = 3(20-5)( .47x.424)1/2, Ro = 221+ <br /> �- Construct well to 25' below water table. <br /> Q well = K(H2-h2) - 42x(252-102) = 0.21 gpm 13 gph <br /> og R r r1,055 Log 22/2 <br /> Data from prior wells drilled on sit_ indicate the soils are more <br /> pervious at 50' and deeper. Therefore, well Q is expected to be <br /> on the order 5 to 15 gpm• <br /> s' <br /> i <br /> y <br /> -. -10- }w <br />