Three wells A, B and C top the same horizontal aquifer. The distances AB = 1200 m and BC= 1000 m. The well B is exactly south of well A and the well C lies to the west of well B. The following are the ground surface elevation and depth of water below the ground surface in the three wells. Determine the direction of ground water flow in the aquifer in the area ABC of the wells. Well A B C Surface elevation (metre above datum) 200 197 202 Depth of water table (m) 4 7 14

Three wells A, B and C top the same horizontal aquifer. The distances AB = 1200 m and BC= 1000 m. The well B is exactly south of well A and the well C lies to the west of well B. The following are the ground surface elevation and depth of water below the ground surface in the three wells. Determine the direction of ground water flow in the aquifer in the area ABC of the wells. Well A B C Surface elevation (metre above datum) 200 197 202 Depth of water table (m) 4 7 14

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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An unconfined aquifer is 10 m thick and is being pumped so that one observation well placed at a distance 76 m shows a drawdown of 0.5 m. On the opposite side of the extraction well is another observation well 100 m from the extraction well, shows a drawdown of 0.3 m. Assume the coefficient of permeability of 50 m/day. a.) What is the discharge f the extraction well? b.) Suppose the well at 100 m from the extraction well is now pumped. Show with a sketch what this will do to the drawdown. c.) Suppose the aquifer sits on an aquaclude that has a slope of 1/100. Show with a sketch what this will do to the drawdown.
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