Data

USGS has been collecting hydrologic data in Long Island Sound and its watershed for decades. Collected data include surface-water discharge, continuous and discrete groundwater levels and water-quality sampling. The data are used for a variety of purposes related to the management of water resources in the basin. Explore data releases below.

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March 31, 2020

Coastal wetlands of eastern Long Island, New York (ver. 2.0, March 2024) Coastal wetlands of eastern Long Island, New York (ver. 2.0, March 2024)

This data release contains coastal wetland synthesis products for the geographic region of eastern Long Island, New York, including the north and south forks, Gardiners Island, and Fishers Island. Metrics for resiliency, including unvegetated to vegetated ratio (UVVR), marsh elevation, and mean tidal range, are calculated for smaller units delineated from a Digital Elevation Model...

Woods Hole Coastal and Marine Science Center, USGS Science in Long Island Sound and its Watershed

January 2, 2018

High-resolution geophysical and sampling data collected at the mouth of Connecticut River, Old Saybrook to Essex, 2012, USGS Field Activity 2012-024-FA High-resolution geophysical and sampling data collected at the mouth of Connecticut River, Old Saybrook to Essex, 2012, USGS Field Activity 2012-024-FA

A geophysical and geological survey was conducted at the mouth of Connecticut River from Old Saybrook to Essex, CT in September 2012. Approximately 227 linear-km of digital Chirp sub bottom (seismic-reflection) and 234-kHz interferometric sonar (bathymetric and backscatter) data were collected along with sediment samples, river-bed photographs and/or video at eighty-seven sites within...

Woods Hole Coastal and Marine Science Center, USGS Science in Long Island Sound and its Watershed

August 3, 2017

Coastal Groundwater Chemical Data from the North and South Shores of Long Island, New York Coastal Groundwater Chemical Data from the North and South Shores of Long Island, New York

Groundwater data were collected in the spring and fall of 2008 from three sites representing different geological settings and biogeochemical conditions within the surficial glacial aquifer of Long Island, NY. Investigations were designed to examine the extent to which average vadose zone thickness in contributing watersheds controlled biogeochemical conditions and processes, including...

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center, USGS Science in Long Island Sound and its Watershed