A permeability test was carried out from a well that sunk through a surface layer of loose sand. Figure below shows the arrangement of pumping wells, together with relevant dimensions. Initially, the piezometric surface (ground water table) was m3 4. located at a depth of 2.5m. When steady state was achieved at a pumping rate 38.5- hour the following drawdowns were observed. Pumping well, d, = 3. 64m Observation well, d1 = 0.96m Observation well, d2 = 0.48m %3D Calculate the coefficient of permeability of the sand in m/hr.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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A permeability test was carried out from a well that sunk through a surface
layer of loose sand. Figure below shows the arrangement of pumping wells, together
with relevant dimensions. Initially, the piezometric surface (ground water table) was
m3
4.
located at a depth of 2.5m. When steady state was achieved at a pumping rate 38.5-
hour
the following drawdowns were observed.
Pumping well, d, = 3. 64m
Observation well, d, = 0.96m
Observation well, d2 = 0.48m
%3D
Calculate the coefficient of permeability of the sand in m/hr.
62 m
18 m
G.W.T
d,
do
12 m
h,
Impermeable strata
Transcribed Image Text:A permeability test was carried out from a well that sunk through a surface layer of loose sand. Figure below shows the arrangement of pumping wells, together with relevant dimensions. Initially, the piezometric surface (ground water table) was m3 4. located at a depth of 2.5m. When steady state was achieved at a pumping rate 38.5- hour the following drawdowns were observed. Pumping well, d, = 3. 64m Observation well, d, = 0.96m Observation well, d2 = 0.48m %3D Calculate the coefficient of permeability of the sand in m/hr. 62 m 18 m G.W.T d, do 12 m h, Impermeable strata
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