Water flows in a rectangular channel at a discharge of 8 m/sec, water depth of 2.0 m, and a bed width of 4.0 m. If the channel's bed elevation is increased by 0.3 m by a smooth upward step. a. What is the type of flow and the water depth at the raised section? b. What is the maximum allowable rise in the bed level that keeps the upstream water level unchanged? What will happen if the step size exceeds that value?