Optimal Risk-Based Design of Storm Sewer Networks

by Wilson H. Tang, (A.M.ASCE), Assoc. Prof.; Dept. of Civ. Engrg., Univ. of Illinois, Urbana, Ill.,
Ben Chie Yen, (M.ASCE), Assoc. Prof.; Dept. of Civ. Engrg., Univ. of Illinois, Urbana, Ill.,
Larry W. Mays, (A.M.ASCE), Research Asst.; Dept. of Civ. Engrg., Univ. of Illinois, Urbana, Ill.,


Serial Information: Journal of the Environmental Engineering Division, 1975, Vol. 101, Issue 3, Pg. 381-398


Document Type: Journal Paper

Abstract: Optimal design of sewer network has conventionally been pursued within a deterministic framework. However, such design may be appropriate because of existence of uncertainties affecting the performance of a storm sewer system, e.g., precipitation rate, insufficient data, errors in design equations, and other factors. These uncertainties are systematically evaluated and incorporated in the proposed design of a storm sewer system. The optimal choice of slopes and diameters of the entire sewer network is based on a tradeoff between risk due to potential flood losses and the cost of installation of the sewers. Discrete differential dynamic programming technique is used in the risk-based design.

Subject Headings: Storm sewers | Risk management | Uncertainty principles | Frames | Precipitation | Errors (statistics) | Slopes

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