Selected hydrogeologic and chloride-concentration data for the northern and central coastal area of New Castle County, Delaware

Abstract

This report summarizes and presents existing hydrogeologic and chloride-concentration data from the northern and central coastal area of New Castle County, Delaware. The report was prepared as an initial stage to evaluate the effects that the proposed deepening of the main navigational channel of the Delaware River would have on groundwater resources in Delaware. The study area was defined on the basis of current and projected groundwater usage from aquifers known or thought to be in hydraulic contact with the Delaware River. The report includes maps that show the location of the study area and associated geologic and hydrologic characteristics. Tables listing hydrologic characteristics, water use, annual groundwater withdrawals, and chloride-concentration data for the study area also are included.