A well 12-in in diameter penetrates vertically through a confined aquifer with an initial piezometer level of 125 feet (ho). After a long period of pumping at a rate of 500 gpm, the drawdowns in the wells 80 ft and 120 ft from the pumped well were found to be 6.8 ft and 4.2 ft respectively. The thickness of the aquifer is 60 ft. What is the approximate drawdown in the pumped well to the tenths digit in feet? Hint: Use the Confined Well equation. Do not enter units, only the numeric answer.

Structural Analysis
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Chapter2: Loads On Structures
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A well 12-in in diameter penetrates vertically through a confined aquifer with an initial piezometer
level of 125 feet (ho). After a long period of pumping at a rate of 500 gpm, the drawdowns in the
wells 80 ft and 120 ft from the pumped well were found to be 6.8 ft and 4.2 ft respectively. The
thickness of the aquifer is 60 ft. What is the approximate drawdown in the pumped well to the
tenths digit in feet?
Hint: Use the Confined Well equation.
Do not enter units, only the numeric answer.
Transcribed Image Text:A well 12-in in diameter penetrates vertically through a confined aquifer with an initial piezometer level of 125 feet (ho). After a long period of pumping at a rate of 500 gpm, the drawdowns in the wells 80 ft and 120 ft from the pumped well were found to be 6.8 ft and 4.2 ft respectively. The thickness of the aquifer is 60 ft. What is the approximate drawdown in the pumped well to the tenths digit in feet? Hint: Use the Confined Well equation. Do not enter units, only the numeric answer.
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