Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Estimation of Water Quality Criteria Violation Frequencies Using Pearson Percentiles.
Author Rossman, L. A. ;
CORP Author Municipal Environmental Research Lab., Cincinnati, OH.
Year Published 1986
Report Number EPA/600/D-86/199;
Stock Number PB86-239811
Additional Subjects Water quality ; Contaminants ; Urban areas ; Overflows ; Sewers ; Mathematical models ; Probability density functions ; Stochastic processes ; Criteria ; Estimates ; Water pollution control
Library Call Number Additional Info Location Last
NTIS  PB86-239811 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 20p
A numerical technique is developed for estimating water quality violation frequencies due to pollutant discharges from urban areas during combined sewer overflow events. The first four moments of in-stream pollutant concentration are found by integrating a pollutant loading - water quality impact model over the probability density functions of its stochastic rainfall and streamflow inputs. The Pearson family of probability distributions is then used to estimate violation frequencies of water quality criteria. The approach proves to be a flexible and efficient method for the initial screening of alternative combined sewer overflow abatement measures.