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E. J. Koszalka

Publications and source records attributed to E. J. Koszalka.

8 recordsLinked to original sources
USGS1984

Geohydrology of the northern part of the town of Brookhaven, Suffolk County, New York

In general, ground water in the area is of suitable quality for drinking and most other uses. Some constituents, however, particularly iron, chloride, and nitrogen, occur locally in unacceptable concentrations. Average hydraulic conductivity ranges from 100 to 300 feet per day (ft/d) in the upper glacial aquifer and from 50 to 70 ft/d in the Magothy aquifer. Transmissivity ranges from 25,000 to 105,000 feet squared per day (ft2/d) in the upper glacial aquifer and from 13,000 to 41 ,000 ft2/d in the Magothy aquifer. Only sparse data are available for the Lloyd aquifer; average hydraulic conductivity and transmissivity are estimated to be 40 ft/d and 10,000 ft2d, respectively. Precipitation (44.4 inches per year) is the only source of ground water in central and eastern Long Island. In the area studied, about 21.5 inches per year reaches the ground-water reservoir. The remainder is lost to over-land runoff (0.5 inch) and evapotranspiration (22.4 inches). Total public-water-supply pumpage in the area is estimated to be 23.2 million gallons per day. Of this total, 15.8 million gallons per day is withdrawn from the upper glacial aquifer and 7.4 million gallons per day from the Magothy aquifer; the Lloyd aquifer is not used for water supply in the area. (USGS)

Water-Resources Investigations Report↗
USGS1983

Altitude of the top of the Matawan Group-Magothy Formation, Suffolk County, Long Island, New York

The Magothy aquifer, with its irregular surface and deeply eroded buried valleys, has become the major source of fresh water in most of Suffolk Country. With the availability of recent data from deep wells and test holes, refinement of the surface-altitude contours has been possible and resulted in substantial revision in some areas. This 1-sheet map delineates the surface altitude of the Magothy aquifer (Matawan Group-Magothy Formation) and includes a brief text and bibliography.

New York↗
USGS1983

Geologic reconnaissance of an extensive clay unit in north-central Suffolk County, Long Island, New York

Recent geologic data indicate an extensive lacustrine clay unit within the glacial deposits in the area between the Harbor Hill and Ronkonkoma moraines in north-central Suffolk County, New York. The unit, locally known as the ' Smithtown clay unit ' (informal usage), is an integral part of the glacial aquifer in this area. The clay occurs at depths varying from 90 ft above to 150 ft below National Geodetic Vertical Datum of 1929 (NGVD) and attains a maximum thickness of 170 ft in the northern part of the Town of Smithtown. Its upper surface is mostly above NGVD and reaches a maximum altitude of 90 ft in the Town of Huntington. The unit is predominantly clay but locally contains lenses of sand, silt, and gravel. The upper part of the clay is generally light to dark brown; the lower part is light gray, which is characteristics of other clays in the glacial aquifer. (USGS)

Water-Resources Investigations Report↗