STEADY FLOW IN OPEN CHANNELS
Example 8.7
A long rectangular concrete-lined channel (k=0.3 mm) 4.0 m wide, bed slope 1:500 is fed by a reservoir via and uncontrolled inlet. Assuming that uniform flow is established a short distance from the inlet and that entry losses = 0.5V^2/2g determine the discharge and depth of uniform flow in the channel when the livel in the reservoir is 2.5 m above the bed of the channel at inlet.
Figure 8.20 is and example of natural channel control; the discharge is affected both by the resistance of the channel and the energy available at the inlet.
Two simultaneous equations therefore need to be solved:
Apply the energy equation to sections 1 and 2