A trapezoidal channel with 1:2 side slopes and a bed slope of 0.005. The sides of the channel are protected with concrete revetment (n=0.05) and the channel bed is alluvial (n=0.03). a) b) c) For a flow of 1000 cfs and a bottom width of 20 ft, find the flow depth Yo using the bisecting method for the compound channel. Find critical depth for a flow rate of 1000 cfs. Find Q if the flow depth is 8 ft. 1 B= 2 2 tan (1/Z) 2 2.Y tan(3), 2.Y tan (p), for W- (1) for W- 0 4 =