1.1. Introduction to Open Channel Flow and Uniform Flow (Contind.)

Try these first

1. 1.

   What is open channel flow?

   Hint

   Think of natural rivers or ditches.

2. 2.

   Define the hydraulic radius.

   Hint

   Consider the influence of water on the channel's shape.

3. 3.

   What is the formula for calculating discharge using Manning's equation?

   • Q = (1/n) AR^(2/3) S0^(1/2)
   • Q = nAR^(1/2) S0^(1/3)
   • Q = n(A^2/P)^(1/3) S0^(1/2)

   Hint

   Identify the variables: Q is discharge, n is roughness coefficient.

4. 4.

   The hydraulic radius is defined as?

   • True
   • False

   Hint

   Think about the flow configuration.

5. 5.

   A trapezoidal channel has a bottom width of 8 meters and depth of 2 meters, side slopes of 1:1. Calculate the discharge if n=0.013 and slope is known.

   Hint

   Ensure you calculate the hydraulic radius correctly.

6. 6.

   Using the principles of a circular channel, derive the expression for the wetted perimeter given a half circle depth, and apply it to find discharge.

   Hint

   Be careful with angle calculations to avoid errors with trigonometric functions.