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GENERALIZED SOFT WATER ACIDIFICATION MODEL
Citation:
Nikolaidis, N., H. Rajaram, J. Schnoor, AND K. Georgakakos. GENERALIZED SOFT WATER ACIDIFICATION MODEL. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-88/565.
Description:
A generalized soft water acidification model has been developed. enhanced trickle-down (ETD) model is driven by precipitation, evaporation, acidity, sulfate, and chloride loading time series daily input data. he hydrologic component simulates snowmelt, interflow, overland flow, groundwater flow, frozen ground processes, seepage, and evapotranspiration. hysicochemical and biological processes that affect the alkalinity or sulfate balance and are included in the formulation are cation exchange, chemical weathering, sulfate sorption, and sulfate reduction. he system of 20 ordinary differential equations is solved by using a variable time step fourth-order predictor-corrector numerical scheme. hown here is calibration of the ETD model for two lakes in the Adirondack park of New York. TD is relatively simple and requires limited input data, and yet it accounts for the predominant hydrologic and biochemical processes of the ecosystem.