Structural Analysis
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![The thickness of a horizontal, confined, homogeneous, isotropic aquifer of infinite areal
extent is 30m. A well fully penetrating the aquifer was continuously pumped at a
constant rate of 0.1 m³/s for a period of 1 day. The drawdowns given in the table below
were observed in a fully penetrating well 90 m from the pumping well.
Compute the transmissivity and the storativity by using:
a) the Theis method of log-log matching.
b) the Cooper-Jacob method of semi-log plotting.
[For Part a), you have to first use attached Table to plot the values of W(u) versus 1/u on
a log-log graph in the range of 10-9<u<1.]
t (min)
ho-h (m) t (min)
ho-h (m)
t (min)
ho-h (m) t (min)
ho-h (m)
1
0.14
7
0.39
40
0.66
100
0.81
2
0.70
0.22
0.28
0.40
50
200
0.90
3
9
0.42
60
0.71
400
0.99
4
0.32
0.34
10
0.44
70
0.73
800
1.07
5
21
0.55
80
0.76
1000
1.10
6
0.37
30
0.62
90
0.79](https://content.bartleby.com/qna-images/question/234cde85-36b5-4134-954b-d1e4bc0a675b/c77a8a00-0504-45ff-9f8a-4f4153e35ad3/h0ym96_processed.png)
Transcribed Image Text:The thickness of a horizontal, confined, homogeneous, isotropic aquifer of infinite areal
extent is 30m. A well fully penetrating the aquifer was continuously pumped at a
constant rate of 0.1 m³/s for a period of 1 day. The drawdowns given in the table below
were observed in a fully penetrating well 90 m from the pumping well.
Compute the transmissivity and the storativity by using:
a) the Theis method of log-log matching.
b) the Cooper-Jacob method of semi-log plotting.
[For Part a), you have to first use attached Table to plot the values of W(u) versus 1/u on
a log-log graph in the range of 10-9<u<1.]
t (min)
ho-h (m) t (min)
ho-h (m)
t (min)
ho-h (m) t (min)
ho-h (m)
1
0.14
7
0.39
40
0.66
100
0.81
2
0.70
0.22
0.28
0.40
50
200
0.90
3
9
0.42
60
0.71
400
0.99
4
0.32
0.34
10
0.44
70
0.73
800
1.07
5
21
0.55
80
0.76
1000
1.10
6
0.37
30
0.62
90
0.79
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