A well 0.5 m in diameter penetrates 33 m below the static water table. After a long period of pumping at a rate of 80 m³/hr, the drawdowns in wells 18 and 48 m from the pumped well were found to be 1.8 and 1.1 respectively. (1) What is the transmissivity of the aquifer? (2) What is the approximate drawdown in the pumped well? (3) Determine the radius of influence of the pumping well.

A well 0.5 m in diameter penetrates 33 m below the static water table. After a long period of pumping at a rate of 80 m³/hr, the drawdowns in wells 18 and 48 m from the pumped well were found to be 1.8 and 1.1 respectively. (1) What is the transmissivity of the aquifer? (2) What is the approximate drawdown in the pumped well? (3) Determine the radius of influence of the pumping well.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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To determine the permeability of an aquifer. The aquifer has a test well 300-mm in diameter with two observation wells. A pumping test was conducted for 24 hours with the discharge being held constant at 5,598.8 m^3/day. The first one, 88.03 meters from the test well, has a draw-down of 0.95 meters. The second one, 42 meters from the test well, has a draw-down of 1.39 meters.The static water table penetrates the well to a depth of 27 meters. Determine the radius of influence of the aquifer in meters.
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