# Question: a horizontal saturated 40 m thick confined aquifer is overlain...

###### Question details

A horizontal, saturated, 40 m thick confined aquifer is overlain by 50 m of clay with a density of 2.55 g/cm^3. The static head in the confined aquifer is 75 m given a datum corresponding to the bottom of the aquifer.

Calculate Total stress?

At a point in the aquifer, the pressure head is 60 m. Calculate the effective stress at this point in the aquifer?

Head is reduced from 75 to 65 m in the aquifer. What is the change in pressure head (in meters), fluid pressure, effective stress and total stress?