1. Design a transition from an existing rough concrete rectangular channel (n = 0.017) to a cobble (n = 0.030) trapezoidal channel for a flow of 506 feet/sec. The rectangular section is 8 feet wide with a depth of flow of 5.75 feet. The trapezoidal section is 12.25 feet wide at the bottom with side slopes 2.5H:1V with a depth of flow of 4.5 feet. The length of the new concrete transition is 125 feet, with a minor loss coefficient of 0.25 and a Manning's value of 0.013. Compute the headloss through the transition (16 points) What is the change in the elevation of the channel bottom? (6 points)