A generalized soft water acidification model

作者：Νikolaos P. Nikolaidis, Harihar Rajaram, Jerald L. Schnoor, Konstantine P. Georgakakos · 发表于：Water Resources Research · 年份：1988 · DOI：10.1029/wr024i012p01983 · 被引用次数：53 · 研究领域：Groundwater flow and contamination studies、Groundwater and Isotope Geochemistry、Atmospheric and Environmental Gas Dynamics

A generalized soft water acidification model has been developed. The enhanced trickle‐down (ETD) model is driven by precipitation, evaporation, acidity, sulfate, and chloride loading time series daily input data. The hydrologic component simulates snowmelt, interflow, overland flow, groundwater flow, frozen ground processes, seepage, and evapotranspiration. Physicochemical 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. The system of 20 ordinary differential equations is solved by using a variable time step fourth‐order predictor‐corrector numerical scheme. Shown here is calibration of the ETD model for two lakes in the Adirondack Park of New York. ETD is relatively simple and requires limited input data, and yet it accounts for the predominant hydrologic and biochemical processes of the ecosystem.