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Unformatted text preview: unit hydrograph. 3 - Use this unit hydrograph to estimate the predevelopment hydrograph flow for the 20 year design storm (with the rain duration equal to the natural (predevelopment) time of concentration of 2.5 hours). The net rainfall depth can be estimated as: predevelopment runoff coefficient *I* natural Tc, I=160/(natural Tc+30). We will discuss the project in detail tomorrow and answer any questions you may have. The project due date is postponed to Friday, December 16....
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This note was uploaded on 04/19/2010 for the course CE 421 taught by Professor Shu-guangli during the Spring '05 term at Michigan State University.
- Spring '05