14.6.3. Application in Flow Calculations

Try these first

1. 1.

   Define hydraulic radius.

   Hint

   Consider how the dimensions are defined in channel geometry.

2. 2.

   What are the three classifications of open channel flow?

   Hint

   Think about how parameters change along the channel.

3. 3.

   What is the primary force acting in open channel flow?

   • Friction
   • Pressure
   • Gravity

   Hint

   Recall the characteristics of fluid dynamics for open channels.

4. 4.

   True or False: In open channel flow, the pressure varies significantly along the free surface.

   • True
   • False

   Hint

   Think about the key definition of the free surface.

5. 5.

   Analyze a drainage canal where the area is 30 m², and the wetted perimeter is 10 m. Discuss its hydraulic radius and implications for flow efficiency.

   Hint

   Use the hydraulic radius formula!

6. 6.

   Consider a rural irrigation channel experiencing suddenly altered water levels due to upstream conditions. How would you classify this flow and why?

   Hint

   Think about the flow's reaction to external factors.