in meters of a standard rectangular weir considered without contraction at the downstream portion, if the length of weir is half of the upstream channel width. 2. The river is measured through float method. It has a length marking of 10 meters. Trials were made for 10 times and tabulated the following recorded time in seconds: 12.4 15.5 16.8 17.1 14.9 14.4 16.6 17.2 18.2 15.8 Estimate the flow rate in m3/s of the river if the mean velocity is 75% of the maximum velocity at the top surface. The cross-section area of the channel is close to 15m x 2m.
1. In the upstream portion of a river, it has a rectangular channel 10m wide and 1.2m deep of water flowing with a mean velocity of 0.75 m/s. Determine the height (head H) in meters of a standard rectangular weir considered without contraction at the downstream portion, if the length of weir is half of the upstream channel width.
2. The river is measured through float method. It has a length marking of 10 meters. Trials were made for 10 times and tabulated the following recorded time in seconds:
12.4 15.5 16.8 17.1 14.9 14.4 16.6 17.2 18.2 15.8
Estimate the flow rate in m3/s of the river if the mean velocity is 75% of the maximum velocity at the top surface. The cross-section area of the channel is close to 15m x 2m.
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