Data
Browse real-time data, data releases and more.
All Data
All Data
Filter Total Items: 16836
Cyanotoxins, Chlorophyll-a, and Phytoplankton Assemblage Data for Lake Ontario and Surrounding Tributaries, New York State, April to October 2023 Cyanotoxins, Chlorophyll-a, and Phytoplankton Assemblage Data for Lake Ontario and Surrounding Tributaries, New York State, April to October 2023
This data release contains field measurements and discrete surface water sample results for parameters related to the assessment of harmful algal blooms. Field measurements include fluorescent chlorophyll, phycocyanin fluorescence, and photosynthetically active radiation (PAR). Discrete water samples were analyzed for extracted chlorophyll-a and pheophytin-a concentrations, total...
Photos and Shapefiles of Erosion/Deposition from the 20 July 2021 Black Hollow Debris Flow Photos and Shapefiles of Erosion/Deposition from the 20 July 2021 Black Hollow Debris Flow
This dataset includes photos taken in the field (Final_photos_for_data_release.zip) and a shapefile (Blackhollow_de.shp stored in Blackhollow_de.zip) to document debris flow activity in the Black Hollow watershed. The Black Hollow watershed was burned by the Cameron Peak Fire (13 August to 2 December 2020) and experienced a debris flow on 20 July 2021. The polygon shapefile in this...
Beach topography and nearshore bathymetry of Humboldt Bay North Spit and South Spit, California Beach topography and nearshore bathymetry of Humboldt Bay North Spit and South Spit, California
Repeat topographic and bathymetric surveys were performed by the U.S. Geological Survey along Humboldt Bay North Spit and South Spit within the Eureka littoral cell in northern California. The surveys were used to characterize changes in coastal morphology and sand volume within an area that extends approximately 12 km north and 8 km south of the Humboldt Bay inlet. Bathymetric and...
Carbon and oxygen isotopic compositions of NBS 19 limestone isotopic reference material and its byproduct calcite having finer grain size, measured at the U.S. Geological Survey Reston Stable Isotope Laboratory (RSIL), 2025 Carbon and oxygen isotopic compositions of NBS 19 limestone isotopic reference material and its byproduct calcite having finer grain size, measured at the U.S. Geological Survey Reston Stable Isotope Laboratory (RSIL), 2025
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...
Basin characteristics developed in support of an investigation of regional skew of peak flow for the Upper Mississippi and Souris-Red-Rainy basins, 2024 Basin characteristics developed in support of an investigation of regional skew of peak flow for the Upper Mississippi and Souris-Red-Rainy basins, 2024
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...
Streamflow and Surface-water Presence Data in the Conterminous United States, 1857-2023 Streamflow and Surface-water Presence Data in the Conterminous United States, 1857-2023
This data release includes information on data from 72 streamflow or surface-water presence datasets in the Conterminous United States. It includes location, dataset, parent dataset or publication, site identification (if available), start year, end year, number of years, number of days, frequency of data collection, Strahler stream order, and headwater status.