4.42) A rectangular channel has a width of 30 m, a longitudinal slope of 0.5%, and an estimated Manning's n of 0.025. The flow rate is 100 m/s at a particular section where wwad the depth of flow is observed to be 3.000 m. Temporary asdb construction requires that the channel be contracted to 959 width of 20 m over a distance of 40 m, and then returned alt to its original width of 30 m over a distance of 40 n All are rectangular. Determine the depths of ano flow in the contracted and downstream sections wher (a) I energy losses between sections are neglected; and (b) friction, contraction, and expansion losses are taken into account. [Note: To simplify the computations you can assume that the friction slope is the same at all three sections. Based on your results, evaluate the impact o accounting for energy losses on the estimated different between the water stages at the upstream and downstream sections