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A trapezoidal channel that has a 15 foot bottom width, Manning’s roughness coefficient of 0.033, bed...

A trapezoidal channel that has a 15 foot bottom width, Manning’s roughness coefficient of 0.033, bed slope of 0.0021 ft/ft, symmetrical side slopes of 4H:1V (s = 4), and conveys 250 cfs. It is dammed up to a depth of 4 feet. How far back upstream will it take for the M1 curve to reach normal depth?


    a.   1,430 ft.


    b.   1,894 ft.


    c.   2,302 ft.


    d.   2,934 ft.


    e.   3,486 ft.


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Hydraulic engineering: A trapezoidal channel that has a 15 foot bottom width, Manning’s roughness coefficient of 0.033, bed slope of 0.0021 ft/ft, symmetrical side slopes of 4H:1V (s = 4), and conveys 250 cfs. It is dammed up to a depth of 4 feet. How far back upstream will it take for the M1 curve to reach normal depth?     a.   1,430 ft.     b.   1,894 ft.     c.   2,302 ft.     d.   2,934 ft.     e.   3,486 ft.
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