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Determine the aquifer characteristics S and T assuming that Eq. (4.28) is valid.

Determine the aquifer characteristics S and T assuming that Eq. (4.28) is valid.

Structural Analysis
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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A well pumps water at a rate of 2500 m³/day from a confined aquifer. Drawdown measurements in an observation well 120 m from the pumping well are as follows: Drawdown in metres Time since pump started in minutes 1 1.5 2 2.5 3 4 0 .10 .20 .30 .40 .50 .60 .70 Example .80 Ф 5 6 8 1 - 10 12 Determine the aquifer characteristics S and T assuming that Eq. (4.28) is valid. Drawdown s in metres 0.05 0.08 0.12 0.14 0.16 0.20 0.23 0.27 0.30 0.34 0.37 O As = 0.39 M Time since pump started in minutes 10 14 18 24 30 50 60 80 100 120 150 Q O Time in minutes O Drawdown s in metres Fig. 4.9 Time-drawdown graph (Example 4.5) 0.40 0.44 0.48 0.52 0.61 0.64 0.68 0.73 0.76 0.80 100 200
Transcribed Image Text:A well pumps water at a rate of 2500 m³/day from a confined aquifer. Drawdown measurements in an observation well 120 m from the pumping well are as follows: Drawdown in metres Time since pump started in minutes 1 1.5 2 2.5 3 4 0 .10 .20 .30 .40 .50 .60 .70 Example .80 Ф 5 6 8 1 - 10 12 Determine the aquifer characteristics S and T assuming that Eq. (4.28) is valid. Drawdown s in metres 0.05 0.08 0.12 0.14 0.16 0.20 0.23 0.27 0.30 0.34 0.37 O As = 0.39 M Time since pump started in minutes 10 14 18 24 30 50 60 80 100 120 150 Q O Time in minutes O Drawdown s in metres Fig. 4.9 Time-drawdown graph (Example 4.5) 0.40 0.44 0.48 0.52 0.61 0.64 0.68 0.73 0.76 0.80 100 200
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