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Design-Storm Analysis Extrapolated to Estimate Long-Term Performance

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Design storms provide the discrete conditions needed to begin the design of a collection system. These short-duration events facilitate small and quick model runs, but do not demonstrate the long-term performance of the system. To evaluate long-term performance of systems that were tested and designed with design storms, CH2M HILL, in conjunction with other consultants and the Metropolitan Sewer District of Greater Cincinnati (MSDGC), developed a process that applies design storm model run data to historical rainfall records to estimate a sewer system's long-term performance. This process has been nick-named “annualization” and was developed as part of the Capacity Assurance Program Plan (CAPP) for MSDGC.

Document Type: Research Article


Publication date: January 1, 2006

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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