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Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York

Open-File Report 2011-1041

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Abstract

An investigation of coastal groundwater systems was performed along the North Shore of Long Island, New York, during May 2008 to constrain nutrient delivery to Northport Harbor and Manhasset Bay by delineating locations of likely groundwater discharge. The embayments are bounded by steep moraines and are underlain by thick, fine-grained sediments deposited in proglacial lakes during the last ice age. Beach sand and gravel overlie the glacial deposits along the coast. The continuous resistivity profiling (CRP) surveys that were conducted indicate the existence of low-salinity groundwater in shore-parallel bands, typically 25 to 50 meters wide, along the shorelines of both bays. Piezometer sampling and seepage meter deployments in intertidal and subtidal areas of the two bays confirmed the presence and discharge of brackish and low-salinity groundwater. The large tidal ranges (up to 3 meters) and the steep onshore topography and hydraulic gradients are important variables controlling coastal groundwater discharge in these areas.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York
Series title:
Open-File Report
Series number:
2011-1041
Year Published:
2012
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
Woods Hole Coastal and Marine Science Center
Description:
HTML Document
Time Range Start:
2008-05-01T12:00:00
Time Range End:
2008-05-31T12:00:00
Country:
United States
State:
New York
Other Geospatial:
Long Island;Northport Harbor;Northport Bay;Manhasset Bay;Long Island Sound
Online Only (Y/N):
Y