2.1. Flow Nets

Try these first

1. 1.

   What are the two main types of lines found in a flow net?

   Hint

   Think about what each line represents.

2. 2.

   Can flow lines intersect in a flow net?

   Hint

   Consider the implications of intersection on flow direction.

3. 3.

   What do flow lines indicate in a flow net?

   • Total head
   • Seepage direction
   • Permeability

   Hint

   Think about the movement of water.

4. 4.

   Is it true that two equipotential lines can intersect?

   • True
   • False

   Hint

   Reflect on what equal head means in terms of water flow.

5. 5.

   Analyze a flow net scenario where water flows through a rectangular field with a head drop of 8 m over 4 flow channels. If the permeability is 3 m/day, calculate the total flow rate and explain your steps.

   Hint

   Break it down step-by-step.

6. 6.

   Create a flow net for a seepage problem in a dam structure. List the equipotential lines and flow lines, and calculate the hydraulic gradient given a total head drop of 15 m across a distance of 30 m.

   Hint

   Sketch the net first, paying close attention to spacing and alignment.