A a = 0.55 (m) × b = 0.3 (m) concrete box withManning roughness coefficient of n = 0.016 is tobe placed under a roadway. During the T = 100years design storm, it is expected that water will pond behind theculvert to a height h = 0.2 (m) above the crown ofthe culvert. If the culvert entrance is to be rounded with the exitloss coefficient of Ke = 0.2 and dischargecoefficient of Cd = 0.45. If the slope of theculvert is S% = 0.2 and the length of the culvertis L = 4 (m),
- estimate the flow rate through the culvert.
- If the flow rate drops down to 20% of the design storm,estimate the depth of water behind the culvert.
