When a soil is submerged, the solid particles are subject to buoyancy caused by the water pressure existing at the “underwater” depth position being analyzed. The result is that the effective...

When a soil is submerged, the solid particles are subject to buoyancy caused by the water pressure existing at the “underwater” depth position being analyzed. The result is that the effective intergranular weight (that is, the magnitude of soil weight transmitted at the points where the particles are in contact) of the submerged soil bulk is less than for the condition where the soil bulk is not submerged. Why is the difference between the unit weight of a submerged soil and the same soil above water (the reduction due to buoyancy) independent of the depth below the water surface?