Complete design of dewatering system consists of the diameter and spacing of well points or wells, penetration of wells and the pumping capacities.

Based on Dupuit-Forchheimer assumptions, the slope of the drawdown curve was assumed to be equal to hydraulic agent.

The seepage medium is replaced by an electric conductor consisting of water with some salt or dilutes hydrochloric acid.

ie =Δ h /l, represent gradient formula where Δ h=potential drop and l is the average of last field in the flow net at the exit end.

According to practical suggestion given by A.Casagrande, every transition in the shape of curve is smooth, being either elliptical or parabolic in shape.

The application of electro-osmosis to dewatering of soil was largely developed by L. Casagrande.

The flow lines and equipotential lines always meet at right angles to one another.

Dewatering of fine grained cohesive soil can be done only electro-osmosis method.

The seepage analysis is done on the assumptions that the flow is laminar and Darcy’s law is valid and further assumed that the soil to be dewatered is homogeneous and isotropic.

A flow net can be utilized for determination of seepage, seepage pressure, hydrostatic pressure, and exit gradient.