Ps

There is a confined aquifer whose upper boundary is 10 meter below ground surface. The thickness of the confined aquifer is 30 meter. The piezometer surface for the confined aquifer is 2 mbelow the ground surface (and 8 meters above the upper boundary of the confined aquifer). The bulk density of the media from the ground surface to the upper boundary of the confined aquifer is p1=1900kg/m3. The bulk density of the confined aquifer is p2=2300kg/m3. Point Ais located at the middle elevation of the confined aquifer (i.e. it is 15 meters below the upper boundary of the confined aquifer). a) Calculate the total stress, effective stress, and water pressure (neutral stress) at point A; b) Now if the water table rises 1 meter, calculating the total stress, effective stress, and water pressure at point Aagain; c) Now if the water table drops 1 meter, calculating the total stress, effective stress, and water pressure at point Aagain.

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