Situation 5 A well of diameter 300 mm is constructed to the full depth of a soil of thickness 150 m, below which is an impermeable layer. The water table is 10 m below the ground surface. A pumping test of 12 m³/hr has resulted a draw down of 10 m. Assuming ro = 400 m. 16. What is the head at the pumping well? A. 140 m B. 130 m 17. What is the coefficient of permeability of the pumping well? A. 3.1 x 10-6 m/s B. 2.8 x 10-6 m/s C. D. 18. If the flow C. D. 150 m 120 m 2.4 x 10-6 m/s 3.5 x 10-6 m/s rate increases to 18 m³/hr, what will be the estimated head in the pumping well? A. 133.2 m C. 124.7 m B. 119.8 m D. 108.3 m
Situation 5 A well of diameter 300 mm is constructed to the full depth of a soil of thickness 150 m, below which is an impermeable layer. The water table is 10 m below the ground surface. A pumping test of 12 m³/hr has resulted a draw down of 10 m. Assuming ro = 400 m. 16. What is the head at the pumping well? A. 140 m B. 130 m 17. What is the coefficient of permeability of the pumping well? A. 3.1 x 10-6 m/s B. 2.8 x 10-6 m/s C. D. 18. If the flow C. D. 150 m 120 m 2.4 x 10-6 m/s 3.5 x 10-6 m/s rate increases to 18 m³/hr, what will be the estimated head in the pumping well? A. 133.2 m C. 124.7 m B. 119.8 m D. 108.3 m
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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please solve situation 5
Transcribed Image Text:Situation 5
A well of diameter 300 mm is constructed to the full depth of a soil of thickness 150 m, below which is an
impermeable layer. The water table is 10 m below the ground surface. A pumping test of 12 m³/hr has
resulted a draw down of 10 m. Assuming ro = 400 m.
16. What is the head at the pumping well?
A.
140 m
B.
130 m
17. What is the coefficient of permeability of the pumping well?
A.
3.1 x 10-6 m/s
B.
2.8 x 10-6 m/s
C.
D.
18. If the flow
C.
D.
150 m
120 m
2.4 x 10-6 m/s
3.5 x 10-6 m/s
rate increases to 18 m³/hr, what will be the estimated head in the pumping well?
A. 133.2 m
C. 124.7 m
B. 119.8 m
D.
108.3 m
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