14.5.2. Energy Loss Calculations

Try these first

1. 1.

   What are the two primary forces acting on open channel flow?

   Hint

   Think about the forces affecting water movement.

2. 2.

   Define hydraulic radius.

   Hint

   Consider what A and P represent.

3. 3.

   What type of flow is characterized by constant parameters over a distance?

   • Uniform Flow
   • Gradually Varied Flow
   • Rapidly Varied Flow

   Hint

   Consider what happens if flow characteristics do not change.

4. 4.

   True or False: Friction is the only force acting against flow in open channels.

   • True
   • False

   Hint

   Recall the forces discussed at the beginning.

5. 5.

   An open channel has a width of 5 meters and a depth of 3 meters. If the flow velocity is 2 m/s, calculate the discharge and hydraulic radius. Also, discuss how these parameters influence energy loss.

   Hint

   Determine A and P carefully, and remember the relationships for discussing energy loss.

6. 6.

   In a rapidly varied flow scenario, how would you approach calculating the energy loss when a dam gate is lowered? What factors would influence your calculations?

   Hint

   Consider how abrupt changes affect energy and how to model the changes effectively.