A confined aquifer has a transmissivity, T, of 30 m2/day and a storage coefficient, S, of 0.0008. A production well of radius, r, 0.2 m is pumped at 200 litres/min for 4 days and shut off. Calculate the maximum drawdown and the drawdown 10 days after the start of pumping at the well.

A confined aquifer has a transmissivity, T, of 30 m2/day and a storage coefficient, S, of 0.0008. A production well of radius, r, 0.2 m is pumped at 200 litres/min for 4 days and shut off. Calculate the maximum drawdown and the drawdown 10 days after the start of pumping at the well.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

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A confined aquifer has a transmissivity, T, of 30 m2/day and a
storage coefficient, S, of 0.0008. A production well of radius, r, 0.2 m
is pumped at 200 litres/min for 4 days and shut off. Calculate the
maximum drawdown and the drawdown 10 days after the start of
pumping at the well.
Note: Calculate the result rounded to the second digit after the
decimal point.
Hint: Cooper-Jacobs Solution is valid for u<0.01:
In
2.25Tt
p2 S
S =
47T

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