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Unformatted text preview: 1 Water Resource Engineering CEIE 340 Sayedul H. Choudhury, Ph.D. Hydrologic Design Methods Today’s Topics s Introduction s Design of Roof Drainage s Design of Gutters/Shallow Channels s Weir and Orifice Equations s Design of Pavement-Drainage Inlets s Culvert Design s Unsubmerged Inlet and Outlet s Submerged Inlet, Unsubmerged Outlet, Partially Full Pipe s Submerged Inlet and Outlet s Estimating Detention Basin Volumes s Sizing Detention Basin Outlet Structures 2 Roof Drainage s Determine the number of drains (minimum 2) s Determine the design rainfall intensity s Determine the flow capacity per drain (~ 10,000 sq ft per drain) s Design the system by computing the size of the leader, vertical drains and horizontal drains. Use commercially available standard sizes. ) / ( 0104 . ) min/ / ( hr in i ft sq gal Q u = min) / ( 6 . ) ( 377 . gal Q in d d = min) / ( ) / ( 53 . ) ( 377 . 188 . gal Q ft in S in d d- = Unit Discharge Rate Vertical Pipe Dia....
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- Spring '09