15.3. Specific Energy Approach

Try these first

1. 1.

   Define Specific Energy in your own words.

   Hint

   Think about energy components related to pressure and velocity.

2. 2.

   What are the flow regimes based on Froude numbers?

   Hint

   Recall how the inertia and gravity forces relate.

3. 3.

   What is specific energy?

   • A measure of velocity
   • Total energy per unit weight of fluid
   • The flow depth alone

   Hint

   Focus on the components that make up specific energy.

4. 4.

   In which flow regime do disturbances propagate upstream?

   • True
   • False

   Hint

   Think about the Froude number definitions.

5. 5.

   Given an open channel flow where the depth is 3m and velocity is 5m/s, calculate the specific energy and identify the flow regime. If the channel is designed to carry 120m³/s, what could the critical depth be?

   Hint

   Utilize specific energy equations for calculations and consider flow discharge.

6. 6.

   Discuss how you would design an irrigation channel using specific energy principles to minimize energy loss while maximizing flow efficiency.

   Hint

   Research trade-offs between depth and velocity.