GATE CE 2016 Set 2 — Question 59
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Geotechnical Engineering → Hydrographs & Groundwater → Darcy's Law
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Question
A tracer takes 100 days to travel from Well-1 to Well-2 which are 100 m apart. The elevation of water surface in Well-2 is 3 m below that in Well-1. Assuming porosity equal to 15%, the coefficient of permeability (expressed in m/day) is
Correct answer
(D) 5.00
Solution
Given:
Distance between wells, m
Time of travel, days
Difference in elevation (head loss), m
Porosity,
Distance between wells, m
Time of travel, days
Difference in elevation (head loss), m
Porosity,
1.Calculate seepage velocity ():
m/day2.Calculate discharge velocity ():
m/day3.Calculate hydraulic gradient ():
4.Calculate coefficient of permeability () using Darcy's Law ():
m/dayThus, the correct option is (D).Continue learning with Success Tracker
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