- Q8 A Stratum Of Sandy Soil Overlies A Horizontal Bed Of Impermeable Material The Surface Of Which Is Also Horizontal 1 (46.29 KiB) Viewed 28 times
Q8. A stratum of sandy soil overlies a horizontal bed of impermeable material, the surface of which is also horizontal.
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Q8. A stratum of sandy soil overlies a horizontal bed of impermeable material, the surface of which is also horizontal.
Q8. A stratum of sandy soil overlies a horizontal bed of impermeable material, the surface of which is also horizontal. In order to determine the in-situ permeability of the soil, a test well was driven to the bottom of the stratum. Two observation boreholes were made at distances of 12.5 m and 25 m respectively from the test well. Water was pumped from the test well at the rate of 3x103 m³/s until the water level became steady. The heights of the water in the two boreholes were then found to be 4.25 m and 6.50 m above the impermeable bed. Find the value, expressed in m/day, of the coefficient of permeability of the soil (Ans. 2.4 m/day)
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