A flow net may be utilized for the determination of:

• Flow net:
A Flow net is a graphical representation of the flow of water through a soil mass. It is a curvilinear net formed by the combination of flow lines and equipotential lines.
Equipotential lines are formed by connecting the points of equal total head.

• Application of flow net are as follows:
Determination of seepage
Determination of hydrostatic pressure
Determination of seepage pressure
Determination of exit gradient

• Properties of Flow Net:
The angle of intersection between each flow line and an equipotential line must be 90o which means they should be orthogonal to each other.
Two flow lines or two equipotential lines can never cross each other.
The flow net is correct. if the lowest flow line confirms to the bottom boundary conditions.
An equal quantity of seepage occurs in each flow channel. A flow channel is a space between two flow lines.
Head loss is the same between two adjacent potential lines.
Flow nets are drawn based on the boundary conditions only. They are independent of the permeability of the soil and the head causing flow.
The space formed between two flow lines and two equipotential lines is called a flow field. It should be in a square form.