7.1. Gradually Varied Flow and Rapidly Varied Flow

Try these first

1. 1.

   Define gradually varied flow.

   Hint

   Consider how the depth changes with distance.

2. 2.

   Give an example of rapidly varied flow.

   Hint

   Think of places where water drops suddenly.

3. 3.

   What does GVF stand for?

   • Gradually Varying Flow
   • Geometrically Varying Flow
   • Generalized Vortex Flow

   Hint

   Think of how water depth changes in long channels.

4. 4.

   True or False: Rapidly varied flow occurs when the water depth changes gradually.

   • True
   • False

   Hint

   Consider how quickly the depth can change.

5. 5.

   Calculate the flow rate of a rectangular channel with a width of 5m, depth of 2m, with a Manning's n of 0.015 and slope of 0.01.

   Hint

   Apply the formula Q = (1/n) * A * R^{2/3} * S^{1/2} and remember to calculate area and hydraulic radius.

6. 6.

   Discuss how you would measure the impact of rapidly varied flow on nearby ecosystems.

   Hint

   Consider the immediate vs. long-term effects of flow changes.