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

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

Expert Solution

Ally Wells answered 9 months ago

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