15.3.2. Specific Energy Curve

Try these first

1. 1.

   Define specific energy.

   Hint

   Think about what components make up the total energy.

2. 2.

   What is the Froude number used for?

   Hint

   Remember, it's a dimensionless number.

3. 3.

   What does specific energy consist of?

   • Only pressure head
   • Pressure head and velocity head
   • Only velocity head

   Hint

   Recall the components that make up total energy in fluid mechanics.

4. 4.

   True or False: Subcritical flow occurs when the Froude number is greater than 1.

   • True
   • False

   Hint

   Think about the definitions we've discussed regarding flow regimes.

5. 5.

   Design a canal section that can support a flow rate of 250 m³/s while maintaining critical flow conditions. Calculate the necessary width and depth.

   Hint

   Recall the critical depth equations and apply them to find optimal parameters.

6. 6.

   Evaluate the implications of constructing a series of small dams on a river's course in terms of specific energy and flow conditions.

   Hint

   Think about how energy loss increases with changes in flow conditions and how it impacts fish and sediment transport.