for a confined aquifer 150 ft thick and composed of fine sand of permeability 1.96 ft per hr, a well is pumped to equilibrium at 1000 gpm. The drawdown at an observation well 400 ft away is 2 ft. What will be the drawdown at 40 ft?

for a confined aquifer 150 ft thick and composed of fine sand of permeability 1.96 ft per hr, a well is pumped to equilibrium at 1000 gpm. The drawdown at an observation well 400 ft away is 2 ft. What will be the drawdown at 40 ft?

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter8: Stresses In A Soil Mass

Section: Chapter Questions

Problem 8.14P

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Concept explainers

Groundwater Flow

The term groundwater refers to the water which is found beneath the earth's surface. Pores present in the soil and rocks with fractures make a passage for rainwater to enter the earth's surface and deposit as groundwater. The flow nature and direction of groundwater under the earth's surface directly impacts the strength and compressibility of the soil, which reflects its ability to support structural loads.

Question

for a confined aquifer 150 ft thick and composed of
fine sand of permeability 1.96 ft per hr, a well is
pumped to equilibrium at 1000 gpm. The drawdown
at an observation well 400 ft away is 2 ft. What will
be the drawdown at 40 ft?

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