The downstream side of the dam in Problem 6.8.9 has a slope of l/10 until it reaches the original channel slope at the bottom (Figure P6.8.9). The 10-m wide rectangular channel carries 16.0 m3/sec and has a roughness coefficient of 0.015. Determine the channel and flow classification (e.g., M-2, S-1) on the downstream side of the dam and explain your supporting logic. Also dete1mine the location and depth of the control section. (Hint: Refer to Figures 6.12 and 6.13 after you determine the channel and flow classification.) Then determine the water surface profile on the downstream side of the dam by finding the depth of flow at distances of 0. 3 m, 2.0 m, 7 .0 m, and 30.0 m downstream from the top of the dam. Use a spreadsheet or appropriate computer software to perform the computations. (See the book's preface for computer software suggestions.)