HW_5

HW_5 - CE451 Water Resource Engineering 02/24/2010 Home...

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CE451 Water Resource Engineering 02/24/2010 Home Work # 5 4.9) The map that follows shows the water-table contours in a region where there are no wells in operation. Elevations are in feet. The horizontal scale of map is shown. 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. 4.21) A 30-cm-diameter 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 1.2m 3 /min, the drawdown in the test holes 11 and 35 m from the pumped well is found to be 3.05 and 1.62 m, respectively. What is the hydraulic conductivity of the aquifer? Express your answer in meters per day. What is its
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This note was uploaded on 09/13/2010 for the course CE 451 taught by Professor Lee during the Spring '07 term at USC.

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HW_5 - CE451 Water Resource Engineering 02/24/2010 Home...

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