A rectangular channel with a bed width of 6.0 fi: and a normal depth of 4.0 ft conveys a discharge of 30 / s. Determine the bed slope assuming the Manning roughness coefficient n = 0.025. At a certain point along the channel, the bed slope is reduced such that the normal depth is increased to 6.0 ft. Draw the water surface profile and estimate the distance through which the depth of flow varies.
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