Relations of surface-water quality to streamflow in the Atlantic Coastal, lower Delaware River, and Delaware Bay basins, New Jersey, water years 1976-93

This report presents the results of analyses of 18 water-quality constituents in samples collected at 28 surface-water-quality stations within the Atlantic Coastal, lower Delaware River, and Delaware Bay Basins (referred to as the study area) during water years 1976--93 (October 1, 1975, through September 30, 1993). Relations between each of the 18 constituents and streamflow at the 28 stations over the period of record were determined by testing for trends in the concentrations of constituents during low and high flows. Qualitative values of contributions from constant (point sources and ground water) and intermittent (nonpoint storm runoff) sources were estimated statistically by examining the relations between concentrations of constituents and streamflow, and load and streamflow.