Record Display for the EPA National Library Catalog


Main Title Recovery of the Highly Acidified Clearwater Lake Watershed, Ontario, Canada, Simulated with the IL WAS Model.
Author Eary, L. E. ; Jenne, E. A. ; Vail, L. W. ; Girvin, D. C. ;
CORP Author Battelle Pacific Northwest Labs., Richland, WA.;Corvallis Environmental Research Lab., OR.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-92/455;
Stock Number PB93-141547
Additional Subjects Water pollution control ; Clearwater Lake ; Watersheds ; Acidification ; Air water interactions ; Long term effects ; Air pollution control ; Smelting ; Acid neutralizing capacity ; pH ; Deposition ; Sulfur ; Sulfur oxides ; Canada ; Reprints ; Integrated Lake Watershed Acidification Study Model ; Ontario(Canada)
Library Call Number Additional Info Location Last
NTIS  PB93-141547 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 24p
The integrated Lake Watershed Acidification Study (ILWAS) model was used to simulate the recovery of the highly acidified Clearwater Lake, Ontario. These decreases in acidic constituents are in good agreement with monitoring data. Longterm simulations indicate that deacidification may continue until approximately 2020, if S deposition rates remain at or below the 1987 level. The agreement between simulated and monitoring data for the first 10-a of recovery and the simulated long-term recovery of the lake to its pre-smelter level of acidity lend confidence in the capability of numerical models to simulate the reversibility of watershed acidification and suggest that some highly acidic watersheds may eventually recover, given substantial decreases in acid deposition.