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Water is flowing at a velocity of 10 ft/sec and a depth of 10ft in a channel of rectangular section. Find the change in depth

Water is flowing at a velocity of 10 ft/sec and a depth of 10ft in a channel of rectangular section. Find the change in depth and in absolute water level produced by a) a smooth upward step of 1 ft b) a smooth donward step of 1 ft, in the channel bed c) find the maximum allowable size of thw upstream flow to be a possible as specified

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