Data

This data release contains seasonal streamflow estimates across the conterminous United States (2,691,587 NHDPlusV2 flowlines with defined from nodes) for 21 water years from November 1999 through December 2020. Streamflow was estimated using the Enhanced unit RunOff Method (EROM) following McKay and others (2012) with updated diversion representation and extended here to include...

Approximately 3 to 4 kg of NBS 19 limestone, prepared in 1982 by the U.S. Geological Survey (USGS), serves as a primary reference for the carbon isotope scales VPDB and VPDB-LSVEC and the oxygen isotope scale VPDB. Its consensus values are +1.95 ‰ for δ¹³C and –2.2 ‰ for δ¹⁸O measurements. After more than three decades of distribution, the number of units labeled “NBS 19” shrunk...

Several basin characteristics are computed for gaged watersheds within and near the Upper Mississippi and Souris-Red-Rainy river basins, so that the basin characteristics may be tested for significance in predicting regional skew of peak flow. Basin characteristics were computed using the USGS StreamStats applications for Iowa, Illinois, Indiana, Kansas, Minnesota, Missouri, North Dakota...

This data release provides a variety of water quality benchmarks, compiled from multiple publications and attributed to the NHDPlus v2.1 hydrography, for the conterminous United States (CONUS) for use in integrated water availability studies for evaluating altered water conditions and potential ecological impacts. To avoid ambiguity in terms, for the purpose of this data release, we use...

This data release contains supporting input data tables and results from analysis to identify and interpret clusters of drought events with similar meteorological and hydrological characteristics in the Delaware River Basin. Input data consists of hydrologic variables from the National Hydrologic Model Infrastructure with Precipitation-Runoff Modeling System, version 1.1 (NHM-PRMS v1.1)

Mainstem rivers serve as the backbone of a connected network of hydrologic units that cover the landscape. A mainstem connects a headwater source area to an outlet. The series of data releases, Mainstem Rivers of the Conterminous United States, referred to as "Mainstems", identifies the same mainstem paths across spatial scales in hydrographic datasets for the United States. This data

This dataset contains the Mann-Kendall p value, Theil - Sen slope estimate, summary statistics for eleven modelled water budget components simulated by the National Hydrologic Model Precipitation-Runoff Modeling System (NHM-PRMS) (Markstrom and others, 2024). The trend analyses are created from aggregated outputs from three separate models, each of which was forced with Daymet Version 4...

This data release provides integrated datasets for modeling streamflow and water presence across the HJ Andrews Experimental Forest stream network in western Oregon. The data include daily meteorological drivers from GRIDMET (precipitation, temperature, humidity, radiation, wind speed, evapotranspiration, vapor pressure deficit), observations of stream discharge and wet/dry status from...

This data release presents chemical and biological results from an investigation of the fish uptake and effects from exposure to per- and polyfluoroalkyl substances (PFAS) from groundwater contaminated by fire training activities on Cape Cod, Massachusetts. Twenty-one day exposure experiments were conducted from July to August 2019 and from August to September 2021 using groundwater from...

This dataset contains the Mann-Kendall p value, Theil - Sen slope estimate, summary statistics for eleven modelled water budget components simulated by the following modeling applications: the National Hydrologic Model Precipitation-Runoff Modeling System (NHM-PRMS) version 1.1 (Markstrom and others, 2024), the Weather Research and Forecasting hydrological modeling application (WRF-Hydro

This data release documents seismic data collected immediately adjacent to beaver ponds and in their surrounding floodplain environments using active and passive seismic measurements at three sites. These sites are located in the University of Connecticut (UConn) Forest in Storrs, Connecticut; Fenton-Ruby Park in Willington, Connecticut; and in Gunnison County, Colorado. Horizontal-to...

This data release includes digital orthophotos acquired from a fixed-wing aircraft and field measurements of flow velocity and depth from the Tanana and Yukon Rivers, Alaska, obtained July 1 - 3, 2025. This parent data release includes links to child pages for the data sets produced during the study (see child item links below): 1. Digital orthophotos of the Tanana and Yukon Rivers in...