Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Dispatching System for Control of Combined Sewer Losses.
Author Caller, Robert L. ;
CORP Author Metropolitan Sewer Board, St. Paul, Minn.
Year Published 1971
Report Number EPA-WQO-11020-FAQ; 00080,; 11020-FAQ-03/71
Stock Number PB-203 678
Additional Subjects ( Combined sewers ; Automatic control) ; ( Sanitary engineering ; Combined sewers) ; ( Minnesota ; Storm sewers) ; Surface water runoff ; Flow regulators ; Urban areas ; Rainfall intensity ; Computerized simulation ; Overflows ; Water pollution ; Mathematical models ; Hydrology ; Monitors ; Water pollution control ; Storm water runoff ; Saint Paul(Minnesota) ; Minneapolis(Minnesota)
Library Call Number Additional Info Location Last
NTIS  PB-203 678 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 205p
Results of initial operation of a computer-based data acquisition and control system for a major urban combined sewer system are presented. Impressive reductions in combined sewer overflow pollution of the Mississippi River in Minneapolis and St. Paul have been effected. Working entirely within the limits of the existing interceptor sewer system, and with relatively minor modifications to selected major combined sewer regulators, incidence of overflow was reduced by 66% and duration of overflow by 88% during most of a rainfall season. Computer simulation techniques using actual rainfall data indicate that the amount of overflow volume reduction achieved is the equivalent of a $200 million separation project. A mathematical model has been developed that will, with rain gage data as input, perform runoff analysis, diversion of combined sewer runoff hydrographs at regulators, and routing of diverted hydrographs through the interceptor system. (Author)