14.2.1. Basic Concepts

Try these first

1. 1.

   Define open channel flow.

   Hint

   Think about where you see water flowing without any cover.

2. 2.

   What is the significance of free surface in open channel flow?

   Hint

   Recall the relationship between pressure and surfaces.

3. 3.

   What is the primary force considered in open channel flow?

   • Pressure
   • Friction
   • Gravity

   Hint

   Consider what pulls fluid downhill.

4. 4.

   True or false: In open channel flow, pressure is generally significant at the surface.

   • True
   • False

   Hint

   Think about the definition of free surface.

5. 5.

   A channel has a flow area of 10 m² and a wetted perimeter of 5 m. Calculate the hydraulic radius and classify the flow if the Froude number is 0.7.

   Hint

   Use the hydraulic radius formula and apply the Froude number classification.

6. 6.

   Describe the implications of having supercritical flow in a drainage system and how it affects design considerations.

   Hint

   Consider the balance between speed, flow depth, and potential hazards.