For a flow of 350 ft3/sec, find the normal depth for each channel reach between the stations indicated in the following table. Assume that the channel is trapezoidal with the side slopes shown in the table. Use Table 3.4 to estimate the roughness coefficients.
Station | Elevation (ft) | Distance from Outlet (ft) | Bottom Width (ft) | Side Slopes (horiz:vert) | Description of Channel |
1 | 134 | 0 | 15 | 9:2 | Earth, uniform section. short grass |
2 | 141 | 4,300 | 14 | 7:2 | Earth, uniform section, graveled soil |
3 | 146 | 5,600 | 14 | 3:1 | Earth, fairly uniform section, no vegetation |
4 | 180 | 7,800 | 12 | 5:2 | Earth, fairly uniform section, grass, some weeds |
5 | 235 | 10,400 | 10 | 2:1 | Earth, fairly uniform section, grass, some weeds |
6 | 242 | 11,300 |
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