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Effects of Sanitary Sewers on Ground-Water Levels and Streams in Nassau and Suffolk Counties, New York, Part 1: Geohydrology, Modeling Strategy, and Regional Evaluation (open access)

Effects of Sanitary Sewers on Ground-Water Levels and Streams in Nassau and Suffolk Counties, New York, Part 1: Geohydrology, Modeling Strategy, and Regional Evaluation

From purpose and scope: This report is the first in a three-part series describing the U.S. Geological Survey's efforts in the detailed hydrologic investigation of southern Nassau and southwest Suffolk Counties, which includes a ground-water modeling study to predict the effects of an extensive sewer network scheduled to be completed in 1985. As the introduction to the series, this report has four objectives: (1) to present a detailed description of the hydrologic system in the area, including newly acquired hydrogeologic information; (2) to define the hydrogeologic factors that will be affected by the sewer network; (3) to explain the modeling strategy and describe the techniques used to develop the ground-water models of the two adjacent areas studied; and (4) to present a preliminary evaluation of the effects of sewers as predicted by a regional ground-water flow model.
Date: 1983
Creator: Reilly, Thomas E.; Buxton, Herbert T.; Franke, O. L. & Wait, R. L.
System: The UNT Digital Library
Geohydrology of the Meadowbrook Artificial-Recharge Site at East Meadow, Nassau County, New York (open access)

Geohydrology of the Meadowbrook Artificial-Recharge Site at East Meadow, Nassau County, New York

Purpose and scope: The Meadowbrook artificial-recharge project, a cooperative effort between the U.S. Geological Survey and the Nassau County Department of Public Works (NCDPW) since 1975, is intended to demonstrate the feasibility of using reclaimed wastewater to replenish and improve the quality of Long Island's ground water. This report presents the results of geologic, hydrologic, and hydrochemical studies that were done at the Meadowbrook artificial-recharge site to define conditions prevailing before the start of recharge operations.
Date: 1983
Creator: Aronson, David A.; Lindner, Juli B. & Katz, Brian G.
System: The UNT Digital Library
Use of Flow-Duration Curves to Evaluate Effects of Urbanization on Streamflow Patterns on Long Island, New York (open access)

Use of Flow-Duration Curves to Evaluate Effects of Urbanization on Streamflow Patterns on Long Island, New York

From abstract. This report examines flow-duration curves for nine streams in Nassau and Suffolk Counties to evaluate effects of urbanization on streamflow patterns in New York. It contains a map, graphs, and tables.
Date: 1981
Creator: Prince, Keith R.
System: The UNT Digital Library
Analysis of Three Tests of the Unconfined Aquifer in Southern Nassau County, Long Island, New York (open access)

Analysis of Three Tests of the Unconfined Aquifer in Southern Nassau County, Long Island, New York

This report presents the analysis of "data from three two-day aquifer tests of the unconfined aquifer (water-table_ aquifer in southern Nassau Count, Long Island, during the autumn of 1979.
Date: 1983
Creator: Linder, Juli B. & Reilly, Thomas E.
System: The UNT Digital Library
Preliminary Investigation of a Shallow Ground-Water Flow System Associated With Connetquot Brook, Long Island, New York (open access)

Preliminary Investigation of a Shallow Ground-Water Flow System Associated With Connetquot Brook, Long Island, New York

This report presents the results of a preliminary investigation into the water quality and the relationship between surface and ground-water for the Connetquot Brook basin in Long Island, New York. It contains maps, graphs, and tables.
Date: November 1980
Creator: Prince, Keith R.
System: The UNT Digital Library
Geology of the "20-Foot" Clay and Gardiners Clay in Southern Nassau and Southwestern Suffolk Counties, Long Island, New York (open access)

Geology of the "20-Foot" Clay and Gardiners Clay in Southern Nassau and Southwestern Suffolk Counties, Long Island, New York

Purpose and scope: This report depicts in detail the areal extent, altitude, thickness, and lithology of the "20-foot" clay and Gardiners Clay (the two thickest and most extensive near-surface confining layers in the area) and redefines the surface of the geologic units that directly underlie these clay units at various locations--the Matawan Group-Magothy Formation, undifferentiated, the Monmouth Group, and the Jameco Gravel.
Date: 1983
Creator: Doriski, Thomas P. & Wilde-Katz, Franceska
System: The UNT Digital Library
Distribution and Trend of Nitrate, Chloride, and Total Solids in Water in the Magothy Aquifer in Southeast Nassau County, New York, from the 1950's Through 1973 (open access)

Distribution and Trend of Nitrate, Chloride, and Total Solids in Water in the Magothy Aquifer in Southeast Nassau County, New York, from the 1950's Through 1973

Abstract: Concentrations of nitrate, chloride, and total sol ids in water in the Magothy aquifer, southeast Nassau County, N.Y., show a steadily increasing trend from the early 1950's to 1973. Vertical distribution of nitrate, chloride, and total-solids concentrations as shown in sections of the study area indicate downward movement of these constituents. Maximum concentrations are in a zone underlying the areas of Westbury, Hicksvil.le, and Plainview. Nitrate (as nitrogen) concentration increased from 4-5 milligrams per liter to 7 milligrams per liter in the area of Westbury and from 3 to 10 milligrams per liter in Plainview during the period 1950-73. During this same period, a 10 milligram-per-liter line of equal-chloride concentration on a cross section in the Westbury area moved downward a distance of less than 50 feet (15 meters), and in the area of Hicksville nearly 150 feet (45 meters). Total-solids concentration doubled in the area of Plainview, where maximum downward movement of pollutants was observed.
Date: August 1976
Creator: Ku, Henry F. H. & Sulam, Dennis J.
System: The UNT Digital Library
Water Levels in Nassau County Sewer Districts 2 and 3, Long Island, New York, 1978-79 (open access)

Water Levels in Nassau County Sewer Districts 2 and 3, Long Island, New York, 1978-79

From purpose and scope: The purpose of the study was to collect detailed water level information needed for calibration of the U.S. Geological Survey's digital computer model of ground-water flow.
Date: 1983
Creator: Ku, Henry F. H. & Simmons, Dale L.
System: The UNT Digital Library
Monthly Fluctuations in the Quality of Ground Water Near the Water Table in Nassau and Suffolk Counties, Long Island, New York (open access)

Monthly Fluctuations in the Quality of Ground Water Near the Water Table in Nassau and Suffolk Counties, Long Island, New York

This report presents the results of water sampling in two New York counties and concludes that the possibly cause of fluctuations of chloride, sulfate, and nitrate in the water are "precipitation, lawn fertilizer, dissolved salts from storm runoff, and effluent from septic tanks and cesspools." This report also includes a number of maps and graphs.
Date: August 1978
Creator: Katz, Brian G.; Ragone, Stephen E. & Linder, Juli B.
System: The UNT Digital Library