(b)Water is to be pumped from a well. Two observations well were constructed toobserve the head and drawdown of the groundwater. Calculate the steady flowpumping required for the well to maintain the head (hı and h2) as shown inFigure Q5.Ground surfacePumpingwellh2 = 90.6mh, = 85.3 m%3DConfining Layer, = 30mConfineddepth = 40 mr2 = 100mConfinedaquiferBedrockFigure Q5: Location of observation wells and pumping well in confined aquifer

Given: Confined depth = 40 mh1 = 85.3 mh2 = 90.6 mr1 = 30 mr2 = 100 m

observe the head and drawdown of the groundwater. Calculate the steady flow pumping required for the well to maintain the head (hi and h2) as shown in Figure Q5. Ground surface Pumping well h2 = 90.6m h, = 85.3 m Confining Layer , = 30m Confined depth = 40 m 2 = 100m Confined aquifer Bedrock

observe the head and drawdown of the groundwater. Calculate the steady flow pumping required for the well to maintain the head (hi and h2) as shown in Figure Q5. Ground surface Pumping well h2 = 90.6m h, = 85.3 m Confining Layer , = 30m Confined depth = 40 m 2 = 100m Confined aquifer Bedrock

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter8: Seepage

Section: Chapter Questions

Problem 8.11P

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Question

(b)
Water is to be pumped from a well. Two observations well were constructed to
observe the head and drawdown of the groundwater. Calculate the steady flow
pumping required for the well to maintain the head (hı and h2) as shown in
Figure Q5.
Ground surface
Pumping
well
h2 = 90.6m
h, = 85.3 m
%3D
Confining Layer
, = 30m
Confined
depth = 40 m
r2 = 100m
Confined
aquifer
Bedrock
Figure Q5: Location of observation wells and pumping well in confined aquifer

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