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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Groundwater Age-Tracing Data and Models in a PFOA-Contaminated Bedrock Aquifer, North Bennington, Vermont Groundwater Age-Tracing Data and Models in a PFOA-Contaminated Bedrock Aquifer, North Bennington, Vermont
We computed mean groundwater ages and age distributions at eight wells by calibrating lumped parameter models (LPMs) to concentrations of tracers (3H, CFCs, SF6) in samples using the computer program TracerLPM (Jurgens and others, 2012). We also measured 14C but all samples contained ancient carbonate from the limestone bedrock, and we were unable to resolve the atmospherically-derived...
Rio Icacos, Puerto Rico, Turbidity, FDOM, and Water Temperature, March 2017 to March 2019 Rio Icacos, Puerto Rico, Turbidity, FDOM, and Water Temperature, March 2017 to March 2019
The dataset presents 5- or 15-minute data for turbidity and Fluorescent Dissolved Organic Matter (FDOM) measured by in-stream sensors at the USGS gage Rio Icacos near Naguabo (50075000), Luquillo Experimental Forest, Puerto Rico. The measurement period was 10 March, 2017 to 1 March, 2019. The USGS sensors were co-located with sensors for nitrate and specific conductance operated by...
Five-minute discharge; daily precipitation, stream runoff, and maximum and minimum air temperature; and annual precipitation and runoff for W-9 catchment, Sleepers River Research Watershed near Danville, Vermont, 1991-2018 Five-minute discharge; daily precipitation, stream runoff, and maximum and minimum air temperature; and annual precipitation and runoff for W-9 catchment, Sleepers River Research Watershed near Danville, Vermont, 1991-2018
This data release supports publications on the Sleepers River Research Watershed near Danville, Vermont. Most of the research at Sleepers River takes place at W-9, the 40.5-hectare forested headwater site. Topics include understanding hydrologic flow paths, biogeochemical cycling, and organic carbon dynamics. Flow and precipitation data are integral to understanding these processes, for...
Water-Quality Characteristics, Calculated Nitrogen Loads, and Characteristics of Simulated Recharge Areas for Selected Stream Reaches on Cape Cod, Massachusetts, 2018-2021 Water-Quality Characteristics, Calculated Nitrogen Loads, and Characteristics of Simulated Recharge Areas for Selected Stream Reaches on Cape Cod, Massachusetts, 2018-2021
This data release presents water-quality and streamflow data from 12 streams on Cape Cod, Massachusetts, which were used to identify potential land areas that are sources of high nitrogen loading from groundwater directly to streams. The sources of nitrogen loading to groundwater in this region include wastewater from septic systems and fertilizer and stormwater runoff. Streamflow in the...
Stream Metabolism Estimated from Dissolved Oxygen Data in Connecticut streams, 2015-18 Stream Metabolism Estimated from Dissolved Oxygen Data in Connecticut streams, 2015-18
This dataset provides details from stream metabolism models for 11 stream sites in Connecticut that were monitored during 2015 to 2018 by the U.S. Geological Survey (USGS). Metabolism was estimated at each site using the streamMetabolizer package in the R computing environment. When data were collected for multiple years at a site, stream metabolism was separately estimated for each year...
Data for Modeling Time-Varying Nitrate in Groundwater on Long Island, New York, 1900-2019 Data for Modeling Time-Varying Nitrate in Groundwater on Long Island, New York, 1900-2019
This data release documents nitrate-nitrogen concentration, groundwater ages, age-weighted nitrogen loads, and aquifer and other characteristics that could be used to model time-varying nitrate concentration in groundwater on Long Island, New York. Concentration data consist of median annual nitrate concentrations at approximately 700 supply wells from 1988 to 2019 based on data provided...
Capture-recapture data of Mohave ground squirrels, 1988-2021 Capture-recapture data of Mohave ground squirrels, 1988-2021
We captured Mohave ground squirrels from four study sites in the Coso Range, California, between 1988 and 2021. This dataset includes capture and recapture records of squirrels at each site and individual and environmental variables associated with those records. We used these data in a mark-recapture analysis to estimate six demographic parameters of Mohave ground squirrels: survival...
CTD profiles and discrete water-column measurements collected along the Aleutian Arc during the Aleutian Arc Expedition (AT5038) in June and July 2025 CTD profiles and discrete water-column measurements collected along the Aleutian Arc during the Aleutian Arc Expedition (AT5038) in June and July 2025
Various water variables, including dissolved inorganic nutrients, total alkalinity, dissolved inorganic carbon, and carbon and oxygen isotopes were measured in samples collected using both a Niskin-bottle rosette and Niskin-bottle attached to a ROV at selected depths from sites along the Aleutian Arc in June and July 2025 during the R/V Atlantis Ship AT50-38 (USGS field activity 2025-307...
Collection of Hydrologic Models, Reanalysis Datasets, and Remote Sensing Products Aggregated by Ecoregion over the CONUS from 1900 to 2018 Collection of Hydrologic Models, Reanalysis Datasets, and Remote Sensing Products Aggregated by Ecoregion over the CONUS from 1900 to 2018
This is accompanying data produced for the study "Implications of Model Selection: Inter-Comparison of Publicly-Available, CONUS-Extent Hydrologic Component Estimates". These datasets were converted from their primary structures (rasters and shapefiles) to EPA Ecoregions Level I. Conversion was performed by averaging timestep layers via mean area weight to produce a single vector of...
A summary of CMIP3 and CMIP5 climate change projections for the conterminous U.S. A summary of CMIP3 and CMIP5 climate change projections for the conterminous U.S.
This dataset includes model projections of seasonal temperature (T), precipitation (P), and runoff (R) from 214 climate simulations from coupled model intercomparison project (CMIP) 3 and CMIP5 scenarios for 19-year periods centered on 2030, 2060, and 2090. The summaries of the climate model projections are presented as percentiles (5th, 25th, 50th, 75th, and 95th) of seasonal (October...
Data set used to develop a conceptual framework for effectively anticipating water-quality changes resulting from changes in agricultural activities Data set used to develop a conceptual framework for effectively anticipating water-quality changes resulting from changes in agricultural activities
Agricultural activities can impact water quality and the health of aquatic ecosystems. A conceptual framework was developed that combined generalized concepts on the movement of water, the environmental behavior of chemicals and eroded soil, and the designed functions of various agricultural activities. The framework addresses the impacts on water quality of a broad range of agricultural...
Machine Learning Methods for Downscaling Stream Temperature Predictions, Tested in Eight Watersheds of the Conterminous United States Machine Learning Methods for Downscaling Stream Temperature Predictions, Tested in Eight Watersheds of the Conterminous United States
This model archive provides all data, code, and model outputs used in the corresponding manuscript (Barclay and others, 2026) to test machine learning (ML) methods for downscaling and multi-scale modeling of stream temperature to combine an ML model and/or input data at coarse spatial resolution with an ML model and/or input data at fine spatial resolution to predict stream temperatures...