in Soil Mechanics recategorized by
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The soil profile below a lake with water level at elevation $=0$ m and lake bottom at elevation $=-10$ m is shown in the figure, where $k$ is the permeability coefficient. A piezometer (stand pipe) installed in the sand layer shows a reading of $+10$ m elevation. Assume that the piezometric head is uniform in the sand layer. The quantity of water (in $m^3/s$) flowing into the lake from the sand layer through the silt layer per unit are of the lake bed is

  1. $1.5 \times 10^{-6}$
  2. $2.0 \times 10^{-6}$
  3. $1.0 \times 10^{-6}$
  4. $0.5 \times 10^{-6}$
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