Ground-Water Levels, Flow, and Quality in Northwestern Elkhart County, Indiana, 1980-89.

摘要

The city of Elkhart, Indiana, obtains its public water supply from well fields screened in a thick sand and gravel aquifer. Water quality in the aquifer has changed in some areas in and near Elkhart by disposal of liquid and solid wastes. The report presents the results of the ground-water monitoring program in northwestern Elkhart County. Water levels from 68 wells and water-quality data from 32 wells are presented and discussed. Water-level data are listed in tables and shown on selected maps and hydrographs. Water-quality data are listed in tables and shown on selected maps, hydrogeologic sections, and graphs. The distribution of water containing dissolved bromide is used to delineate the approximate boundaries of a leachate plume near the closed industrial landfill. Changes in dissolved-bromide concentrations during the study are discussed, and the rate of flow of ground water is estimated from the time of peak bromide concentrations in water from wells downgradient from the landfill.