A rectangular concrete channel (n= 0.015) has a bottom width of 6.0 m (19. 7 ft) and a discharge rate of 25 cms (882 cfs). Plot the specific energy diagram for depths ranging from 0.5 m (1.6 ft) to 2.0 m (6.6 ft). From the diagram, determine (a) critical depth (b) minimum specific energy, (c) specific energy for a water depth of 1 9 m (6.2 ft) and (d) water depths when the specific energy is 2.2 m (7.2 ft). What channel slope would result in critical flow?
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