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REACTIONS THAT MODIFY CHEMISTRY IN LAKES OF THE NATIONAL SURFACE WATER SURVEY
Citation:
Lee, S. AND J. Schnoor. REACTIONS THAT MODIFY CHEMISTRY IN LAKES OF THE NATIONAL SURFACE WATER SURVEY. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-93/349 (NTIS PB93229672), 1988.
Description:
A simple mass balance equation was used to determine the important reactions that occur in selected lake watersheds of the Adirondack Park, the Southern Blue Ridge Province of the Appalachian Mountains, and a portion of northern Florida. he mass balance requires only three input parameters: precipitation ion concentration, lake ion concentration, and an evapoconcentration factor applicable to the watershed. t was determined that the most important alkalizing reaction in all three study areas was the production of base cations (Ca 2+, Mg2+ , and Na@) by ion exchange and chemical weathering, followed by sulfate adsorption in the Southern Blue Ridge watersheds and nitrate assimilation/reduction in the Adirondack Park. ry deposition of sulfate was important to the sulfate balance in the Adirondack watersheds and was of the same order of magnitude as wet precipitation inputs. hloride ion could not be used to provide an independent check on the mass balance methodology because unmeasured sources such as dry deposition and mineral dissolution appeared to be significant, especially in the Southern Blue Ridge Province and Florida watersheds.
