A trapezoidal channel with a bed width of 6.0 m and a side slope of 3 : 2 conveys a discharge of 20 /s at a depth of 3.0 m. A smooth transition to a rectangular section 8.0 m wide, accompanied by a...

A trapezoidal channel with a bed width of 6.0 m and a side slope of 3 : 2 conveys a discharge of 20
/s at a depth of 3.0 m. A smooth transition to a rectangular section 8.0 m wide, accompanied by a gradual lowering of the channel bed of 0.5 m, is introduced. (a) Find the water depth within the rectangular section neglecting all losses. (b) What is the type of flow in the rectangular section?