Data Releases
The data collected and the techniques used by USGS scientists should conform to or reference national and international standards and protocols if they exist and when they are relevant and appropriate. For datasets of a given type, and if national or international metadata standards exist, the data are indexed with metadata that facilitates access and integration.
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Chloride Regression Model and Mass Balance for Different Deicing Salt Application Rates on Three Watersheds in Essex County, New York Chloride Regression Model and Mass Balance for Different Deicing Salt Application Rates on Three Watersheds in Essex County, New York
This data release contains tabular data for a regression model used to estimate daily mean chloride concentration from specific conductance, road salt application data, and mass balance data for a study of road salt runoff in Essex County, New York. Road salt application rates were provided by the New York State Department of Transportation (NYS DOT) and the Town of North Elba, NY. Data...
MODFLOW-NWT model used to simulate groundwater flow in Wake County, North Carolina, 2000 through 2070 MODFLOW-NWT model used to simulate groundwater flow in Wake County, North Carolina, 2000 through 2070
The U.S. Geological Survey (USGS) and Wake County Environmental Services developed a collaborative study to assess the hydrogeologic setting and groundwater flow conditions for Wake County, North Carolina. A groundwater-flow model was developed to conceptualize the fractured-rock aquifer system in Wake County and to assess historic and future groundwater resource availability. The...
Simulations of Groundwater Nitrogen Transport in the Long Island, New York Aquifer System Under Potential Nitrogen Management Scenarios (ver. 2.0, January 2026) Simulations of Groundwater Nitrogen Transport in the Long Island, New York Aquifer System Under Potential Nitrogen Management Scenarios (ver. 2.0, January 2026)
This data release contains simulation results from twenty-three (23) transient inset numerical models of the eastern part of Long Island, New York that includes the Peconic River, and estuaries around the North and South Fork. The models simulate nitrogen concentrations in the aquifer and nitrogen loads to surface water bodies from 2020-2120 under different nitrogen inputs that represent...
MODFLOW 6 and MODPATH 7 Models for Simulating Groundwater Flow and Nitrogen Transport in the Long Island, New York Aquifer System (ver. 2.0, January 2026) MODFLOW 6 and MODPATH 7 Models for Simulating Groundwater Flow and Nitrogen Transport in the Long Island, New York Aquifer System (ver. 2.0, January 2026)
This groundwater model application data release documents transient and steady-state regional and inset numerical models of the Long Island aquifer system that simulate groundwater flow and nitrogen transport for the period 1900-2019 using the US Geological Survey groundwater modeling software MODFLOW 6 (Langvin and others, 2017 and 2022). The development and calibration of the regional
Freshwater fish and mussel projections in the Northeastern United States at the HUC12 scale under different climate and land use scenarios Freshwater fish and mussel projections in the Northeastern United States at the HUC12 scale under different climate and land use scenarios
These data comprise the results of an analysis to 1. develop freshwater fish and mussel models using survey occurrence data, land use data, stream flow data, and stream temperature data within the Northeast United states, 2. predict the impacts of climate change on vulnerable groups of freshwater fish and mussel species, and 3. assess the potential for different management interventions...
Abundance, occupancy and habitat data recordings for Coqui Llaneros near Caño Tiburones; Arrecibo, Puerto Rico Abundance, occupancy and habitat data recordings for Coqui Llaneros near Caño Tiburones; Arrecibo, Puerto Rico
The Coquí Llanero (Eleutherodactylus juanariveroi) is one of twelve remaining species of Eleutherodactylus frogs endemic to Puerto Rico. They are known only from three isolated populations separated from each other by ~30 km: Caño Tiburones, Arecibo; Sabana Seca, Toa Baja, and Carolina. These frogs are cultural icons and hold prominent roles in the energy flow of the island’s tropical...
PFAS in largemouth bass (Micropterus nigricans) and banded killifish (Fundulus diaphanus) from Select Waterbodies in Massachusetts PFAS in largemouth bass (Micropterus nigricans) and banded killifish (Fundulus diaphanus) from Select Waterbodies in Massachusetts
This study assessed site-specific differences in PFAS in fish from Ashumet Pond (2020 & 2022), Sudbury River (2023), and Great Herring Pond (reference site; 2022) in Massachusetts. Largemouth bass were collected from all sites and banded killifish were collected from Ashumet Pond only. Health assessments were performed and included histology of the liver, spleen, kidneys, gonad, and any
Coastal Land-Cover and Feature Datasets Derived From Landsat Satellite Imagery, Sabine Pass to Bay Coquette, Louisiana Coastal Land-Cover and Feature Datasets Derived From Landsat Satellite Imagery, Sabine Pass to Bay Coquette, Louisiana
This data release serves as an archive of coastal land-cover and feature datasets derived from Landsat satellite imagery from Sabine Pass to Bay Coquette, Louisiana (LA). A total of 179 images acquired between 2013 and 2024 were analyzed. Water, bare earth (sand), and vegetated land-cover classes were mapped using (1) successive thresholding and masking of the modified normalized...
Surface and shallow subsurface thermal maturity data for the Arkoma basin, Ouachita Mountains, and Ozark dome region of the U.S.A. Surface and shallow subsurface thermal maturity data for the Arkoma basin, Ouachita Mountains, and Ozark dome region of the U.S.A.
Thermal maturity data (vitrinite reflectance (VRo)) from the Arkoma basin, Ouachita Mountains, and Ozark dome region of the U.S. Data were originally collected in graduate student theses and dissertations, and in a research consortia ca. 1980-1990 under the advisement and leadership of David Houseknecht during his time at University of Missouri. Location data were originally in Township...
Above-water hyperspectral field spectroscopy and associated water quality measurements in the Sacramento-San Joaquin Delta, California, collected in 2024 and 2025 Above-water hyperspectral field spectroscopy and associated water quality measurements in the Sacramento-San Joaquin Delta, California, collected in 2024 and 2025
Broad-area, high-resolution, boat-based water quality mapping surveys of the Sacramento-San Joaquin Delta (Delta) were conducted in June and September of 2024. Each survey was comprised of one day of high-resolution mapping. The regions covered included Discovery Bay and Old and Middle Rivers in the South Delta Tidal Transition Zone. On each day, the route of the mapping survey was...
Estimated crop irrigation water use withdrawals in Big Chino Groundwater Subbasin of the Verde River Groundwater Basin, Arizona for 2024 Estimated crop irrigation water use withdrawals in Big Chino Groundwater Subbasin of the Verde River Groundwater Basin, Arizona for 2024
Observations of irrigated agricultural land within the Big Chino Groundwater Subbasin of the Verde River Groundwater Basin in Arizona. Crops were verified in situ once in 2024 on Aug 14th; based on digitized field boundaries. Field boundaries were digitized from U.S. Department of Agriculture, National Agriculture Imagery Program County Mosaic 2023 imagery for Arizona and supplemented...
Early to Mid-Pliocene Sedimentological Data from the Yorktown Formation, near Jamestown, Virginia Early to Mid-Pliocene Sedimentological Data from the Yorktown Formation, near Jamestown, Virginia
Data consists of grain size distribution by weight in grams of samples collected from the Yorktown Formation from various localities along the James River near Smithfield and Williamsburg, Virginia. In total, data from 34 samples are included in this dataset.