An open channel consists of two long reaches separated by a short horizontal reach. The first reach is steep while the last reach is mild and two gates are located at the end of the first and last...

An open channel consists of two long reaches separated by a short horizontal reach. The first reach is steep while the last reach is mild and two gates are located at the end of the first and last reaches. Assuming that the flow depth in the horizontal reach is higher than the normal depth in the mild reach by 1.5 m, draw the water surface profile.