An unconfined fine sand aquifer has a base elevation of 50 ft (15.2 m). From elevation 50 to 68 ft (15.2 to 20.7 m), the average horizontal nydraulic conductivity is 0.8 ft/day (0.24 m/day), and from 68 to 95 ft (20.7 to 29.0 m) the average horizontal hydraulic conductivity is 3.0 t/day (0.91 m/day). Calculate the transmissivity of the saturated portion of the aquifer when the water table is at (a) elevation 75 ft (22.9 m), and ´b) at elevation 85 ft (25.9 m).

Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Braja M. Das, Nagaratnam Sivakugan
Chapter6: Hydraulic Conductivity
Section: Chapter Questions
Problem 6.1P
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Hydraulic conductivity question 

An unconfined fine sand aquifer has a base elevation of 50 ft (15.2 m).
From elevation 50 to 68 ft (15.2 to 20.7 m), the average horizontal
hydraulic conductivity is 0.8 ft/day (0.24 m/day), and from 68 to 95 ft
(20.7 to 29.0 m) the average horizontal hydraulic conductivity is 3.0
ft/day (0.91 m/day). Calculate the transmissivity of the saturated portion
of the aquifer when the water table is at (a) elevation 75 ft (22.9 m), and
(b) at elevation 85 ft (25.9 m).
Transcribed Image Text:An unconfined fine sand aquifer has a base elevation of 50 ft (15.2 m). From elevation 50 to 68 ft (15.2 to 20.7 m), the average horizontal hydraulic conductivity is 0.8 ft/day (0.24 m/day), and from 68 to 95 ft (20.7 to 29.0 m) the average horizontal hydraulic conductivity is 3.0 ft/day (0.91 m/day). Calculate the transmissivity of the saturated portion of the aquifer when the water table is at (a) elevation 75 ft (22.9 m), and (b) at elevation 85 ft (25.9 m).
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