Navigation, bathymetry, and water temperature points of ship position during continuous resistivity profile data collection in Manhasset Bay on Long Island, New York in May, 2008 (RESGPSPNTS_MANHASSET.SHP)

Online link https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2011-1041/resgpspnts_manhassetmeta.faq.html
Description 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. For more information on the survey involved in this project, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2008-007-FA. [More]
Originators Bratton, John F.; Cross, VeeAnn A.; Crusius, John; Kroeger, Kevin D.; and Worley, Charles R.
Field activities 2008-007-FA

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Thumbnail GIF image showing the location of resistivity navigation points collected in Manhasset Bay. The coastline with piers is included for spatial reference.
Thumbnail GIF image showing the location of resistivity navigation points collected in Manhasset Bay. The coastline with piers is included for spatial reference.