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<br />Where <br />K hydraulic conductivity - ft/sec <br />R = casing radius (ft) <br />L length of slotted casing <br />tl = time when slug introduced <br />t2 = time at measurement of h2 <br />hl = initia] head <br />h2 = head at time t2 <br />(from U.S. Navy Bureau of Yards and Docks in Cedergren, 1967) <br />The results were <br />K = 1 X 10 5 ft/sec <br />= 1.15 ft/day <br />= 35 cm/day <br />Given a test section or slotted section of 5' - 40' silted in to 23' the <br />computed transmissivity = (1.15 ft/day) (18 ft open section) = 20.7 ft2/day = T <br />• <br />• <br />'-9-28 <br />