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The storm-water run-off from a 150 m x 200 m parking area must be taken to...

The storm-water run-off from a 150 m x 200 m parking area must be taken to an existing open channel by means of a rectangular concrete channel. The width of the new concrete channel is 1,2 m and the maximum slope available is 1:150. Calculate the depth of flow in the new concrete channel.

C = 0,95, I = 105 mm/h and n = 0,013

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