1. Procedure for Drawing Flow Nets

Try these first

1. 1.

   What is the role of equipotential lines in a flow net?

   Hint

   Think about water levels in standpipes.

2. 2.

   What is a flow line?

   Hint

   It's related to the direction of water flow.

3. 3.

   What do equipotential lines indicate?

   • Flow direction
   • Areas of equal head
   • Material boundaries

   Hint

   Think about the meaning of 'equal' in terms of head.

4. 4.

   True or False: Flow lines are always perpendicular to equipotential lines.

   • True
   • False

   Hint

   Recall the definitions of flow lines and equipotential lines.

5. 5.

   Given a soil profile with one permeable and one impermeable layer, draw the expected flow net and identify the boundary conditions.

   Hint

   Think about how water can or cannot move through these layers.

6. 6.

   How might the flow net change if the direction of water flow is reversed in a soil with multiple layers? Discuss the implications.

   Hint

   Consider how the properties of flow and head define the net shape.