Hydrogeochemistry of carbonate groundwaters of an urban area

摘要: A comparison of the groundwater chemical data from shallow dolomite aquifer Northeastern Illinois Metropolitan Area (NIMA) August 1972 through April 1973 with collected 12–40 yr earlier indicates that concentrations all ions have increased, greatest increase occurring in south-eastern part area where overburden is thinnest. The largest increases are 843, 142, and 91% Cl−, SO42−, Na+, respectively. However, spatial distribution types has remained same time. was found to be apparently supersaturated respect calcite dolomite; however, two saturation indices were reduced by 20 30%, respectively, after considering effect ion pairings. character controlled, among other factors, change carbon dioxide content water along flow path. model for solution based on standard equations carbonate equilibrium presented. application study a variety geologic conditions between overlying glacial drift prevail area.