Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Inter-Regional Comparison of Patterns and Trends in Surface Water Acidification Across the United States.
Author Newell, A. D. ;
CORP Author ManTech Environmental Technology, Inc., Corvallis, OR.;Corvallis Environmental Research Lab., OR.
Publisher c1993
Year Published 1993
Report Number EPA/600/J-93/408;
Stock Number PB93-236453
Additional Subjects Surface waters ; Acidification ; Water pollution sampling ; Environmental monitoring ; Long term effects ; Air water interactions ; Water quality data ; Trends ; Regional analysis ; United States ; pH ; Air pollution ; Comparison ; Acid neutralizing capacity ; Lakes ; Streams ; Precipitation(Meteorology) ; Concentration(Composition) ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB93-236453 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 11/22/1993
Collation 26p
Temporal trends in acid-base chemistry are reported for surface waters in 6 regions of the United States. The lakes and streams are low acid neutralizing capacity (ANC), dilute systems, selected to represent acid-sensitive aquatic resources in the 6 regions. The predominant trends observed were decreases in lake and stream SO4(2-) concentrations in sites east of the Mississippi River, and increases in NO3(-) in the Adirondack lake and Catskill stream sites (both located in eastern New York State). Correlations of trend results from all sites with other factors indicated that trends in precipitation volume were highly correlated with the observed trend patterns. From the surface water trend results, three distinct clusters were identified that corresponded to three trend patterns: 'dilution', recovery', and 'acidification', which were distributed across the Long-Term Monitoring (LTM) regions with no particular geographic patterns. (Copyright (c) 1993 Kluwer Academic Publishers.)