HW_5-Solutions

# HW_5-Solutions - C E 4 4 i 1 v i d e e ’ • 4 9 T h e m...

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C E 44-i 1-vid ee’ 4.9) The map that follows s o r- a le contours in a region where there are no wells in operation. Elevations are in feet. The horizontal scale of map is shown. 100 ft Sc On the map A and B represent two nonpumping observation wells. Dye injected into well A appears at well B in 90 days. Several tests indicate that the soil below the water table has a porosity of 28 percent. On the basis of these data determine the hydraulic conductivity of the aquifer. Express your answer in gallons per day per square foot and meters per second. frLat O dr& 4 q\$’ °j ----__ ——-—.—— j______ ____ Zt?rZ ___ 4___zz iz —___

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4.21) A 30-cm-diametçr well penetrates vertically through an aquifer to an impermeable stratum located 18.0 m below the static water table. After a long period of pumping at a rate of! .2m 3 /min, the drawdown in the test holes 11 and 35 m from the pumped well isjQun3bë 3.05 and 1 62 m, respectively. What is the hydraulic conductivity of the aquife? Express your answer in meters per day. What is its transmissivity?
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