Record Display for the EPA National Library Catalog


Main Title Acid Deposition and Watershed Characteristics in Relation to Lake Chemistry in Northeastern Minnesota.
Author Rapp, G. ; Allert, J. D. ; Liukkonen, B. W. ; Loucks, O. L. ; Glass, G. E. ;
CORP Author Environmental Research Lab.-Duluth, MN. ;Minnesota Univ., Duluth. Coll. of Science and Engineering. ;Butler Univ., Indianapolis, IN. Holcomb Research Inst.
Year Published 1985
Report Number EPA/600/J-85/448;
Stock Number PB87-116372
Additional Subjects Acidity ; Neutralizing ; Lakes ; Air pollution ; Water pollution ; Chemical analysis ; Sulfates ; Alkalinity ; Color ; Water chemistry ; Watersheds ; Color ; Geochemistry ; Land use ; Correlation ; Regression analysis ; Tables(Data) ; Minnesota ; Reprints ; Acid rain
Library Call Number Additional Info Location Last
NTIS  PB87-116372 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 18p
The relationship between lake sensitivity to atmospheric acidic inputs and the neutralization capacity of watersheds is examined for 267 lakes in northeastern Minnesota. Three water chemistry/sensitivity measures (color, sulfate, and alkalinity) are correlated with variables representative of precipitation and sulfate inputs, hydrology, and the acid neutralization capacity of various watershed components. An ordinal scale for ranking bedrock and surficial deposit neutralization capacity is presented. The watershed variables found to account for the largest percentages of the variability in measured color, sulfate, and alkalinity levels are determined. The results illustrate important averaging properties of watersheds from small headwater systems to large drainages and the difficulty in obtaining correlations for some water quality measures (e.g., alkalinity) when some variables, such as soils and land cover, are available only as large-area averages.