In a deposit of fine sand, the water table is 3.5m below the Surface but sand to a height of 1 m above the water table is saturated by capillary water. above this height, the sand may be assumed dry. The saturated and dry unit weights, respectively, are 20 kN/m3 and 16 kN/m3. Calculate the effective vertical stress in the sand, 8 m below the surface.

In a deposit of fine sand, the water table is 3.5m below the Surface but sand to a height of 1 m above the water table is saturated by capillary water. above this height, the sand may be assumed dry. The saturated and dry unit weights, respectively, are 20 kN/m3 and 16 kN/m3. Calculate the effective vertical stress in the sand, 8 m below the surface.