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Browsing Open File Reports by Author "Demicco, P.M."
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Item Ground-Water Availability In Southern New Castle County, Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1983-04) Groot, J.J.; Demicco, P.M.; Cherry, P.J.The purposes of the study described in this report are (1) to determine the total amount of fresh ground water (chloride content less than 150 milligrams/liter) available in New Castle County south of the Chesapeake and Delaware Canal, and (2) to map the geographic distribution of available fresh ground water on the basis of areas delineated by one minute of latitude and one minute of longitude (such areas measure essentially one square mile). The investigation has been based solely on data available in various publications and in the files of the Delaware and United States Geological Surveys.Item Saturated Thickness of the Columbia Formation in Southern New Castle County, Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1983) Groot, J.J.; Demicco, P.M.; Cherry, P.J.This map shows the saturated thickness of the Columbia Formation. The Columbia Formation covers most of the Coastal Plain of Delaware. Because it consists primarily of coarse sand, it is important to the hydrology of the area. It is an important groundwater reservoir and in most places water must pass through it to reach deeper units. The water budget of the Columbia Formation also influences runoff and baseflow components of streamflow. The saturated thickness was determined through interpretation of data in publications and files of the Delaware Geological Survey, United States Geological Survey, and the Water Resources Center of the University of Delaware. The thicknesses shown on the map represent the best judgment of the authors based on available data. Detailed investigations of specific sites will require additional data.Item Saturated Thickness of the Water-Table Aquifer in Southern New Castle County, Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1983) Groot, J.J.; Demicco, P.M.; Cherry, P.J.This map shows the saturated thickness of the water-table aquifer. This aquifer consists of the deposits of the Columbia Formation and those portions of the Magothy and Englishtown-Mt. Laurel formations, and Rancocas Group that are hydraulically connected with the Columbia deposits (see Groot, Demicco, and Cherry, 1983). For example, large, saturated thicknesses in the zone trending northeast-southwest near Townsend reflect the addition of the sands of the Rancocas Group to the total thickness of the sands of the overlying Columbia Formation.