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The specific energy diagram for a channel transition is shown on the next page. The drop in the channel bottom has been designed such that the decrease in channel width just barely avoids damming. The upstream depth is 1.5 m, and the specific energy is 1.7 m. Assuming a rectangular channel, what is the amount of channel drop and the downstream width of the channel if the total discharge is 15 m3/s?Specific Energy Diagram 15 mn 1.4 m 1.7 m Specific Energy [m]

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=> with th. chan nd at downstruan coat lse at minimu, m E2 E E:E 3めgiven 2 3 2 3. 9.8 A22.4 B22.4 B2

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