Question

8. At one location on the ground a porous layer lies above
an impervious stratum. The thickness of this porous layer is
7 meters. Water table also lies in the porous layer and it is
at the depth of 1.5 m below the ground surface. A test well
is drilled into the ground which penetrates the whole
thickness of this permeable layer. Through this well the
water is pumped out at the rate of 100 liters per second.
The drawdown of the water table because of this pumping
out is observed by making observation wells at a distance
of 7 m and 21 m from the test well. The drawdown
observed at 7 m is 3 m and at 21 m it is 0.8 m. Assume
suitable data wherever necessary.
The coefficient of permeability of that porous layer of soil in
mm/sec is
​

Answer 1

Answer:

dabsngg

dddfggffkkhhgffhhjhhdg