Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Terrestrial and In-Lake Contributions to Alkalinity Budgets of Drainage Lakes: An Assessment of Regional Differences.
Author Shaffer, P. W. ; Church, M. R. ;
CORP Author Northrop Services, Inc., Corvallis, OR.;Corvallis Environmental Research Lab., OR.
Publisher c1989
Year Published 1989
Report Number EPA-68-03-3246; EPA/600/J-89/111;
Stock Number PB90-108440
Additional Subjects Lakes ; Alkalinity ; Hydrochemistry ; Statistical data ; Forecasting ; Production rate ; Sulfates ; Models ; Reprints ; Eastern Region(United States) ; Acid precipitation ; Regional analysis
Library Call Number Additional Info Location Last
NTIS  PB90-108440 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 03/10/1990
Collation 9p
Using two independent procedures, relative contributions of in-lake alkalinity generation to total basin alkalinity budgets for drainage lakes in selected regions of the Eastern United States are estimated. The first method is based on the assumption of approximately equal areal rates of alkalinity production by watersheds and lakes, and uses watershed area to lake area ratio as a direct estimator of relative alkalinity contributions. The second approach is based on existing models for in-lake alkalinity generation estimated from sulfate retention. Projections from the two methods are comparable, and show that for most drainage lakes in Northeastern United States, Southern Blue Ridge Province, and Upper Midwest, in-lake alkalinity generation is a minor contributor to net basin alkalinity production, contributing 7% or less of total net basin alkalinity production in typical watersheds in any of the regions. Regional assessment of current or future effects of acidic deposition on surface water chemistry in the Northeastern United States, the Southern Blue Ridge Province or other areas dominated by drainage lakes with high watershed to lake area ratio would not appear to be seriously comprised by use of models limited to consideration of terrestrial processes. In areas such as the Upper Midwest which are characterized by high proportions of seepage lakes or for lakes with long hydrologic residence times, in-lake processes and hydrologic influences must be considered.