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A concrete box culvert with Manning’s roughness coefficient n = 0.015 and a rounded entrance (ke...

A concrete box culvert with Manning’s roughness coefficient n = 0.015 and a rounded entrance (ke = 0.2) is to be designed to carry the design flow of 8.0 m3 /s. The culvert slope is 0.6% and the length is 36.0 m. If the maximum-allowable headwater level is 2.4 m above the culvert invert, determine the size of the box culvert with free-outlet conditions and verify the flow type.

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