2.2. Calculation of Flow in a Channel

Try these first

1. 1.

   What is a flow line?

   Hint

   Think about the path followed by water.

2. 2.

   True or False: Equipotential lines can intersect.

   Hint

   Consider what it means for a line of equal head.

3. 3.

   What do flow lines represent?

   • Direction of fluid flow
   • Area of fluid flow
   • Intensity of fluid flow

   Hint

   Remember what direction implies.

4. 4.

   True or False: Equipotential lines allow fluid flow.

   • True
   • False

   Hint

   Think about what the presence of a gradient means for movement.

5. 5.

   Given a permeable soil sample with k = 5 m/day, calculate the expected flow rate through a 100m long sample with a head drop of 20m.

   Hint

   Plug the variables into the formula correctly.

6. 6.

   A construction site needs to estimate the flow change if the head drop increases from 2m to 10m across 8 flow channels, assuming permeability remains at 15 m/day.

   Hint

   Pay attention to how head changes impact flow.