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The time – drawdown data for a confined aquifer is given below for a discharge of 1500 gpm. The distance of the observation well is 300 ft. here, T=52849.388 ft^2/day and S=0.000568 A.Show that the basic criteria for using Cooper-Jacob approximation is satisfied.  B.For the computed T and S values, what is the limiting value of time ‘t’ that satisfies the basic criteria of well function parameter ‘u’?

The time – drawdown data for a confined aquifer is given below for a discharge of 1500 gpm. The distance of the observation well is 300 ft. here, T=52849.388 ft^2/day and S=0.000568 A.Show that the basic criteria for using Cooper-Jacob approximation is satisfied.  B.For the computed T and S values, what is the limiting value of time ‘t’ that satisfies the basic criteria of well function parameter ‘u’?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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The time – drawdown data for a confined aquifer is given below for a discharge of 1500 gpm. The distance of the observation well is 300 ft.

here, T=52849.388 ft^2/day and S=0.000568

A.Show that the basic criteria for using Cooper-Jacob approximation is satisfied. 

B.For the computed T and S values, what is the limiting value of time ‘t’ that satisfies the basic criteria of well function parameter ‘u’? 

Drawdown (ft) Time after pumping started (min) 1 0.45 2 0.74 3 0.91 4. 1.04 6 1.21 1.32 10 1.45 30 2.02 40 2.17 50 2.30 60 2.34 80 2.50 100 2.67 200 2.96 400 3.25 600 3.41 800 3.50 1000 3.60 1440 3.81
Transcribed Image Text:Drawdown (ft) Time after pumping started (min) 1 0.45 2 0.74 3 0.91 4. 1.04 6 1.21 1.32 10 1.45 30 2.02 40 2.17 50 2.30 60 2.34 80 2.50 100 2.67 200 2.96 400 3.25 600 3.41 800 3.50 1000 3.60 1440 3.81
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