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RECORD NUMBER: 47 OF 146

OLS Field Name OLS Field Data
Main Title Factors Contributing to Differences in Acid Neutralizing Capacity among Lakes in the Western United States.
Author Eilers, J. M. ; Landers, D. H. ; Brakke, D. F. ; Linthurst, R. A. ;
CORP Author Corvallis Environmental Research Lab., OR. ;Northrop Services, Inc., Corvallis, OR. ;Western Washington Univ., Bellingham.
Year Published 1987
Report Number EPA/600/D-87/309;
Stock Number PB88-112156
Additional Subjects Alkalinity ; Lakes ; Acidification ; Watersheds ; Geomorphology ; Western region(United States) ; Acid neutralizing capacity ; Acid deposition
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB88-112156 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 21p
Abstract A survey of lakes in mountainous areas of the Western United States was conducted in fall 1985 by the US Environmental Protection Agency (EPA) in cooperation with the USDA - Forest Service. Of the 719 probability sample lakes, only one was acidic; 99% of the lakes were estimated to have pH>6.0. However, acid neutralizing capacity (ANC) was < or = 50 microeq L-1 for an estimated 16.8% of the lakes in the study area. Of the five subregions in the West, California had the highest proportion of lakes with ANC < or = 50 microeq L-1 (36.7%) and the Southern Rocky Mountains had the lowest proportion (4.6%). The lakes in the West were post-stratified into geomorphic units corresponding to major mountain ranges. Watershed factors, including watershed area, lake area, watershed area: lake area ratio, lake depth, watershed slope, percent exposed bedrock, elevation, and hydraulic residence time, were examined within six geomorphic units in order to evaluate their relationship to lake ANC. These watershed variables had poor predictive capability with respect to ANC. The results suggest that higher-resolution information for factors such as mineralogy and hydrology are required for prediction of lake ANC within a given geomorphic unit.
Supplementary Notes Prepared in cooperation with Northrop Services, Inc., Corvallis, OR., and Western Washington Univ., Bellingham.
PUB Date Free Form Sep 87
Category Codes 48G; 99A
NTIS Prices PC A03/MF A01
Primary Description 600/02
Document Type NT
Cataloging Source NTIS/MT
Control Number 736520000
Origin NTIS
Type CAT