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Main Title Stream Chemistry in the Eastern United States. 2. Current Sources of Acidity in Acidic and Low Acid-Neutralizing Capacity Streams.
Author Herlihy, A. T. ; Kaufmann, P. R. ; Mitch, M. E. ;
CORP Author Utah Water Research Lab., Logan.;Corvallis Environmental Research Lab., OR.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-91/104;
Stock Number PB91-206979
Additional Subjects Streams ; Water chemistry ; Acidification ; Water pollution ; Pollution sources ; Water quality ; Acid neutralizing capacity ; Natural emissions ; Air water interactions ; Deposition ; Air pollution ; Acid mine drainage ; Geochemistry ; Hydrology ; Watersheds ; Forests ; Anions ; pH ; Reprints ; Eastern Region(United States) ; Organic ions ; National Stream Survey
Library Call Number Additional Info Location Last
NTIS  PB91-206979 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 16p
The authors examined anion composition in National Stream Survey (NSS) data in order to evaluate the most probable sources of current acidity in acidic and low acid neutralizing capacity (ANC) streams in the eastern United States. Acidic streams that had almost no organic influence (less than 10% of total anions) and sulfate and nitrate concentrations indicative of evaporative concentration of atmospheric deposition were classified as acidic due to acidic deposition. These acidic streams were located in small forested watersheds in the Mid-Atlantic Highlands (an estimated 1950 km of stream length) and in the Mid-Atlantic Coastal Plain (1250 km). Acidic streams affected primarily by acidic deposition but also influenced by naturally occurring organic anions accounted for another 1180 km of acidic stream length and were located in the New Jersey Pine Barrens, plateau tops in the Mid-Atlantic and Southeast Highlands, and the Florida Panhandle. The total length of streams acidic due to acid mine drainage in the NSS (4590 km) was about the same as the total length of acidic streams likely affected by acidic deposition (4380 km). Acidic streams whose acid anion composition was dominated by organics were located in Florida and the Mid-Atlantic Coastal Plain. In Florida, most of the acidic streams were organic dominated, whereas about half of the streams in the Mid-Atlantic Coastal Plain were organic dominated. Organic-dominated acidic streams were not observed in the Mid-Atlantic and Southeast Highlands. (Copyright (c) 1991 by the American Geophysical Union.)