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Main Title Assessing the Regional Effects of Sulfur Deposition on Surface Water Chemistry: The Southern Blue Ridge (Journal Version).
Author Eshleman, K. N. ; Kaufmann, P. R. ;
CORP Author Northrop Services, Inc., Corvallis, OR. ;Utah Water Research Lab., Logan.;Corvallis Environmental Research Lab., OR.
Publisher c1988
Year Published 1988
Report Number EPA-68-03-3246; EPA/600/J-88/245;
Stock Number PB89-145064
Additional Subjects Surface waters ; Acidification ; Volumetric analysis ; Mathematical models ; Sulfuric acid ; Air pollution ; Assessments ; Streams ; Lakes ; pH ; Water chemistry ; Comparison ; Concentration(Composition) ; Water analysis ; Sites ; Field tests ; Reprints ; Water pollution sampling ; Water pollution detection ; Blue Ridge Mountains ; Air-water interactions
Library Call Number Additional Info Location Last
NTIS  PB89-145064 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
A method was developed for quantifying the regional chronic acidification of surface waters which uses synoptic survey data and a conceptual titration model of acidification. The principal assumptions of the model are that stream waters have been titrated by an amount of sulfuric acid equivalent to their current SO4(sup -2) concentration and historical pH and acid-neutralizing capacity (ANC) can be calculated from current chemical data. The model allows for increases in SO4(sup -2) concentration to be compensated by increased production of base cations through use of a regional coefficient. Making 'worst case' assumptions, the median historical decline in ANC and pH in streams in the Southern Blue Ridge was estimated to be 23 micro equiv/L and 0.09 unit, respectively. An inverse correlation between the SO4 to base cation ratio and ANC is shown to be consistent with the use of the titration model. (Copyright (c) 1988 by the American Chemical Society.)