A 2 ft diameter well penetrates vertically through a confined aquifer 50 ft thick. When the well is pumped at 500 gpm in 1 day, the drawdown in a well 50 ft away is 10 ft and in another well 100 ft away is 3 ft. The storativity of aquifer is 0.0005. What is the value for transmissivity and drawdown? Note; the piezometric head is 100ft from datum. Combination of thiem & thies equation
A 2 ft diameter well penetrates vertically through a confined aquifer 50 ft thick. When the well is pumped at 500 gpm in 1 day, the drawdown in a well 50 ft away is 10 ft and in another well 100 ft away is 3 ft. The storativity of aquifer is 0.0005. What is the value for transmissivity and drawdown? Note; the piezometric head is 100ft from datum. Combination of thiem & thies equation
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A 2 ft diameter well penetrates vertically through a confined aquifer 50 ft thick. When
the well is pumped at 500 gpm in 1 day, the drawdown in a well 50 ft away is 10 ft and
in another well 100 ft away is 3 ft. The storativity of aquifer is 0.0005. What is the value
for transmissivity and drawdown? Note; the piezometric head is 100ft from datum.
Combination of thiem & thies equation
Transcribed Image Text:Ground surface
Pre-pumping
head
Drawdown curve
Pumping
well
Observation
wells
Conlining Layer
h.
Confined
aquifer
Bedrock
Figure 1: Confined aquifer
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