Water-Quality Characteristics and Trends for Selected Sites in or Near the Earth Resources Observation Systems (EROS) Data Center, South Dakota, 1973-2000;Water-resources investigations rept

摘要

The purpose of this report is to describe the general water-quality characteristics and trends for selected sites located in and near the EROS Data Center. The selected sites were the sites with a sufficient number of water-quality samples for statistical analysis that have been collected from 1973 through 2000. Comparisons of water quality by aquifer and comparisons of surface water and ground water by water source are presented for sites in the EROS Data Center water-quality monitoring program, and also for sites in the EROS Data Center vicinity that have sufficient water-quality data but were not part of the monitoring program. Comparisons are made for physical properties, major-ion chemistry, nutrients, and trace elements for the surface-water and ground-water samples. This report presents spatial and temporal variations where sufficient data are available. Analytical results also are presented for 58 constituents analyzed in bottom material samples collected from three locations in EROS Lake.