4. For a confined well with 1000gpd withdrawal the draw dawn from several observation well are given in table below. Calculate the following: (a) Using the Thiem formula, complete the following table; (b) On semi-log graph paper, plot the final draw-down for each observation well with the log distance from the pumping well. Draw the best fitting line through the four points and obtain the rate of draw-down per log cycle. Then obtain the transmissivity value using Thiem equation; and (c) Compare with the values obtained in parts (a) and (b). 1 (feet) 98.0 2.6 2(feet) 295.0 98.0 295.0 $1(feet) 3.57 7.34 $2(feet) 2.35 3.57 2.35 KB(gpd/t) 7.34 3.57 2.35 7.34 2.6 98.0 295.0 2.6 705.0 0.82 705.0 705 0.82 0.82 Mean kB
4. For a confined well with 1000gpd withdrawal the draw dawn from several observation well are given in table below. Calculate the following: (a) Using the Thiem formula, complete the following table; (b) On semi-log graph paper, plot the final draw-down for each observation well with the log distance from the pumping well. Draw the best fitting line through the four points and obtain the rate of draw-down per log cycle. Then obtain the transmissivity value using Thiem equation; and (c) Compare with the values obtained in parts (a) and (b). 1 (feet) 98.0 2.6 2(feet) 295.0 98.0 295.0 $1(feet) 3.57 7.34 $2(feet) 2.35 3.57 2.35 KB(gpd/t) 7.34 3.57 2.35 7.34 2.6 98.0 295.0 2.6 705.0 0.82 705.0 705 0.82 0.82 Mean kB
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
![4. For a confined well with 1000gpd withdrawal the draw dawn from several observation well are given
in table below. Calculate the following: (a) Using the Thiem formula, complete the following table;
(b) On semi-log graph paper, plot the final draw-down for each observation well with the log
distance from the pumping well. Draw the best fitting line through the four points and obtain the
rate of draw-down per log cycle. Then obtain the transmissivity value using Thiem equation; and
(c) Compare with the values obtained in parts (a) and (b).
1 (feet)
98.0
2.6
2(feet)
295.0
98.0
S1(feet)
3.57
7.34
7.34
3.57
$2(feet)
2.35
3.57
2.35
0.82
KB(gpd/ft)
2.6
295.0
98.0
295.0
2.6
705.0
705.0
705
2.35
0.82
7.34
0.82
Mean kB](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F82a985b3-e556-47e7-8a2b-439ce9891f4f%2Fba87833b-7d3c-4813-adce-d48dda9e581c%2Fao0ryzf_processed.jpeg&w=3840&q=75)
Transcribed Image Text:4. For a confined well with 1000gpd withdrawal the draw dawn from several observation well are given
in table below. Calculate the following: (a) Using the Thiem formula, complete the following table;
(b) On semi-log graph paper, plot the final draw-down for each observation well with the log
distance from the pumping well. Draw the best fitting line through the four points and obtain the
rate of draw-down per log cycle. Then obtain the transmissivity value using Thiem equation; and
(c) Compare with the values obtained in parts (a) and (b).
1 (feet)
98.0
2.6
2(feet)
295.0
98.0
S1(feet)
3.57
7.34
7.34
3.57
$2(feet)
2.35
3.57
2.35
0.82
KB(gpd/ft)
2.6
295.0
98.0
295.0
2.6
705.0
705.0
705
2.35
0.82
7.34
0.82
Mean kB
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