3.7. Channel Depth Variation

Try these first

1. 1.

   Define the term 'Normal Depth'.

   Hint

   Think about what defines the relationship between energy and depth in steady state flow.

2. 2.

   What is the Froude number used for?

   Hint

   Remember how inertia and gravity play roles in flow.

3. 3.

   What does the Froude number signify in channel flow?

   • It is always equal to 1.
   • It indicates flow regime.
   • It measures depth energy.

   Hint

   Think about what factors influence how water moves.

4. 4.

   True or False: Normal depth is necessary for efficient flow.

   • True
   • False

   Hint

   Consider what maintaining a balance means for channel flow.

5. 5.

   Given a rectangular channel with a flow depth increasing from 1.5 ft to 3 ft over 100 ft distance, compute expected changes in the Froude number.

   Hint

   Consider the velocity and how the flow depth relates to critical flow states.

6. 6.

   Design an irrigation canal that maintains a normal depth of 2.5 ft while considering a channel slope of 0.02 m/m. Estimate the channel dimensions necessary for steady flow.

   Hint

   What dimensions would ensure flow stability based on the channel geometry?