Question: A rectangular channel 7 5 m wide has a uniform depth of flow of 3 . 2 5 m and has a bed slope of

A rectangular channel 75 m wide has a uniform depth of flow of 3.25m and has a bed slope of 1 in 3000. If due to a weir constructed at the downstream end of the channel, water surface at a section is raised by 1.5 m. Determine the water surface slope with respect to horizontal at this section. Assume Manning's 0.020.

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