Automatic Control of Large-Scale Combined Sewer Systems

by John W. Labadie, (A.M.ASCE), Assoc. Prof. of Civ. Engrg.; Colorado State Univ., Fort Collins, Colo.,
Bruce M. Bradford, Grad. Research Asst.; Dept. of Civ. Engrg., Colorado State Univ., Fort Collins, Colo.,
Neil S. Grigg, (M.ASCE), Assoc. Prof. of Civ. Engrg.; Colorado State Univ., Fort Collins, Colo.,

Serial Information: Journal of the Environmental Engineering Division, 1975, Vol. 101, Issue 1, Pg. 27-39

Document Type: Journal Paper

Abstract: The pollution of receiving waters by overflows from combined sewers is a national problem of serious concern. A recent viable solution strategy for the problem involves the development of automatic control systems as an alternative to more expensive sewer separation or large-scale treatment projects. Development of the control logic is difficult, due mainly to the size and complexity of the problem. A hierarchical control strategy is developed and applied to the proposed San Francisco Master Plan for Wastewater Management. The large-scale problem is decomposed into several first-level subbasin problems, with a second level master problem tying them together. An aggregation approach is also presented as another way of developing a hierarchical control structure. The subbasin problems can be solved either on-line of off-line, depending on the complexity of the sewer transport models utilized.

Subject Headings: Combined sewers | Automation | Control systems | Wastewater management | Retention basins | Water pollution |

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