In: Civil Engineering
A rectangular channel with a base width of 3 m carries a discharge of 6 m3/s at a depth of 1.1 m. At downstream, there is a gradual rising of a channel bed of 0.1 m.
a) Plot the specific energy curve from y = 0.4 m to 1.3 m in a step 0.1 m and from the curve, determine the depth of flow at the downstream section. Label the graph and show your working answers clearly on the graph. *

| y flow depth | Specific Energy E |
| 0.2 | 5.408 |
| 0.25 | 3.583 |
| 0.3 | 2.614 |
| 0.35 | 2.050 |
| 0.4 | 1.702 |
| 0.45 | 1.479 |
| 0.5 | 1.333 |
| 0.55 | 1.239 |
| 0.6 | 1.179 |
| 0.65 | 1.143 |
| 0.7 | 1.125 |
| 0.743 | 1.120 |
| 0.75 | 1.120 |
| 0.8 | 1.125 |
| 0.85 | 1.138 |
| 0.9 | 1.157 |
| 0.95 | 1.181 |
| 1 | 1.208 |
| 1.05 | 1.239 |
| 1.1 | 1.272 |

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