ABSTRACT
Since the soil is completely saturated, the volume change f},.dv of the element of thickness dz in time dt is equal to the change in volume of water dq in the same element in time dt.
Therefore, dq = f},.dv (7.39)
or
or
(7.40)
(7.41)
is defined as the coefficient ofconsolidation. Eq. (7.40) is the differential equation for one-dimensional flow. The differential equation for
three-dimensional. flow may be developed in the same way. The equation may be written as
(7.42)
' ky and kz are the coefficients of permeability (hydraulic conductivity) in the coordinate directions of x, y and z respectively.
