A pump out test is carried out in a perforated well of 30 cm in diameter, extending into an impervious zone, and through an aquifer 17 m thick from the ground surface. The phreatic line is at 4 m below ground-surface level. After 24 hours of continuously pumping water out of the well, equilibrium has been reached. The discharge of the pump is 5.4 cu.m/hr and the drawdown is 4 m. The radius of influence R was estimated to be 15 m. Determine the average coefficient of permeability of the soil.
A pump out test is carried out in a perforated well of 30 cm in diameter, extending into an impervious zone, and through an aquifer 17 m thick from the ground surface. The phreatic line is at 4 m below ground-surface level. After 24 hours of continuously pumping water out of the well, equilibrium has been reached. The discharge of the pump is 5.4 cu.m/hr and the drawdown is 4 m. The radius of influence R was estimated to be 15 m. Determine the average coefficient of permeability of the soil.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A pump out test is carried out in a perforated well of 30 cm in diameter, extending into an impervious zone, and through an aquifer 17 m thick from the ground surface. The phreatic line is at 4 m below ground-surface level. After 24 hours of continuously pumping water out of the well, equilibrium has been reached. The discharge of the pump is 5.4 cu.m/hr and the drawdown is 4 m. The radius of influence R was estimated to be 15 m. Determine the average coefficient of permeability of the soil.
Transcribed Image Text:Substratum
4m
F
2r
Ø30cm
H
13m
17 m
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