The potentiometric surface of the Magothy Aquifer on Long Island, New York, in March 1975

Abstract

A map showing the potentiometrie surface of the Magothy aquifer was drawn from water-level measurements made in March 1975. These measurements indicated a range in altitude of the potentiometrie surface from more than 25 feet (7.62 metres) below mean sea level in Queens County to more than 80 feet (24.38 metres) above mean sea level in Nassau County.

Ground-water flow and solute transport at a municipal landfill site on Long Island, New York — Part 2: Simulation of ground-water flow

“…Miller and Frederick (1969) discussed the precipitation regime of Long Island. Nakao and Erlichman (1978) and Donaldson and Koszalka (1983b) compiled water-table maps of Long Island, and Prince (1976) and Donaldson and Koszalka (1983a) compiled potentiometric-surface maps of the Magothy aquifer.…”

Geohydrology of the Lloyd aquifer, Long Island, New York

“…Other potentiometric maps of the Lloyd aquifer were prepared by the U.S. Geological Survey's Long Island staff for the years 1947 (Lusczynski, 1952), 1971 (Kimmel, 1973(Kimmel, ), 1975 (Rich and others, 1975), and 1979 (Donaldson and Koszalka, 1983b). Maps of the potentiometric surface of the Magothy aquifer that were used in this study are as follows: 1972 (Koch and Koszalka, 1973); 1975 (Prince, 1976), and 1979 (Donaldson and Koszalka, 1983a). Specific stratigraphic problems were addressed by Perlmutter and Todd (1965), Sirkin (1974), and Perry and others (1975).…”

“…This value is corroborated by results of mass-balance computations and by an estimate of recharge to the Lloyd calculated from potentiometric maps. Maps showing the potentiometric surface of the Magothy aquifer (Prince, 1976) and Lloyd aquifer (Rich, Prince, and Spinello, 1975) during March 1975 and January 1975, respectively, were used to produce a map ( fig. 13) showing the difference in hydraulic head between these two aquifers (Magothy head minus Lloyd head).…”

Water-table and potentiometric-surface altitudes of the upper glacial, Magothy, and Lloyd aquifers on Long Island, New York, in March-April 2000, with a summary of hydrogeologic conditions

“…Saltwater intrusion has occurred in the past in Kings, Queens, and southwestern Nassau Counties (Perlmutter and Geraghty, 1963;Lusczynski and Swarzenski, 1966;Cohen and Kimmel, 1971;Buxton and others, 1981;Chu and Stumm, 1995), and in small areas along the northern shore of Nassau County (Stumm, 1994). Parts of all three aquifers are naturally saline throughout the North Fork (Hoffman, 1961;Crandell, 1963;McNew and Arav, 1995;Bohn-Buxton and others, 1996) and South Fork (Perlmutter and DeLuca, 1963;Nemickas and Koszalka, 1982;Prince, 1986) of eastern Long Island.…”

“…Other Magothy aquifer maps were compiled by Prince (1976Prince ( ) for 1975Vaupel and others (1977Vaupel and others ( ) for 1959Vaupel and others ( , 1966Vaupel and others ( , and 1972Donaldson andKoszalka (1983a) for 1979;Doriski (1986Doriski ( ) for 1983Doriski (1987) for 1984, Busciolano (1997) for 1990, and Busciolano and others (1998 for 1997.…”