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Q2) A trapezoidal wadi 3 m wide and 2:1 side slope is to cross a road...

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Civil Engineering

Q2) A trapezoidal wadi 3 m wide and 2:1 side slope is to cross aroad at station 1+120. The drainage area is 50-hectare consistingof bare earth with steep slopes. A concrete box culvert isconsidered to drain the wadi assuming 15 minutes concentration-timeand a 20-years return period.
Determine the minimum width of the culvert to the nearest 10 cmassuming one meter maximum culvert depth, two meter allowableheadwater depth, 1% culvert slope (same as the Wadi slope at thearea), 25 m culvert length and squared culvert edges with headwallparallel to the embankment

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