Question: raised by 0.30 m in elevation at a given section. At the upstream section, the depth of flow is 1.8 m The width of

raised by 0.30 m in elevation at a given section. At the

raised by 0.30 m in elevation at a given section. At the upstream section, the depth of flow is 1.8 m The width of a horizontal rectangular channel is reduced from 3.0 m to 1.85 m and the floor is and the kinetic energy correction factor aj 1.15. If the drop in the water surface elevation at the contraction is 0.25 m, calculate the discharge if (a) the energy loss is neglected, and (b) the energy loss is one-ninth of the upstream velocity head. [The kinetic energy correction factor at the contracted section may be assumed to be unity az=1] (25p). b1-3.0 m y1=1.80 m PLAN b2=1.85 m Energy line PROFILE 0.25 m 0.30 m:

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