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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Inventory of rock avalanches in the central Chugach Mountains, northern Prince William Sound, Alaska, 1984-2024 Inventory of rock avalanches in the central Chugach Mountains, northern Prince William Sound, Alaska, 1984-2024
In the Prince William Sound region of Alaska, recent glacier retreat started in the mid-1800s and began to accelerate in the mid-2000s in response to warming air temperatures (Maraldo and others, 2020). Prince William Sound is surrounded by the Chugach Mountains and has numerous ocean-terminating glaciers, with rapid deglaciation increasingly exposing oversteepened bedrock walls of...
Counts and measurements for specimens of Percina crypta and Percina nigrofasciata (sensu lato) Counts and measurements for specimens of Percina crypta and Percina nigrofasciata (sensu lato)
Counts and measurements were made on specimens of the Halloween darter (Percina crypta) and of the Blackbanded darter (Percina nigrofasciata, sensu lato). Data used in the original description of Percina crypta are included, in addition to counts (and in some cases measurements) for 66 additional Percina nigrofasciata from the Savannah, Altamaha, and upper Chattahoohee river systems, and...
Preliminary digital data for a 3-layer geologic model of the conterminous United States using land surface, top of bedrock, and top of basement (ver. 1.1, April 2025) Preliminary digital data for a 3-layer geologic model of the conterminous United States using land surface, top of bedrock, and top of basement (ver. 1.1, April 2025)
This digital dataset compiles a 3-layer geologic model of the conterminous United States by mapping the altitude of three surfaces: land surface, top of bedrock, and top of basement. These surfaces are mapped through the compilation and synthesis of published stratigraphic horizons from numerous topical studies. The mapped surfaces create a 3-layer geologic model with three geomaterials...
Archive of hydraulic and hydrologic models used in the Stoney Brook watershed in Carlton and St. Louis Counties, Minnesota, 2008–2024 Archive of hydraulic and hydrologic models used in the Stoney Brook watershed in Carlton and St. Louis Counties, Minnesota, 2008–2024
The U.S. Geological Survey (USGS), in cooperation with the Fond du Lac Band of Lake Superior Chippewa (FDLB), Minnesota, analyzed the hydrologic and hydraulic conditions within the Stoney Brook watershed. The Stoney Brook watershed covers an area of 100.8 square miles in Carlton and St. Louis counties with most of the watershed within the Fond du Lac Reservation. Wild rice, which is...
Streamflow characteristics and trends at 97 continuous-record and 719 partial-record streamflow gaging stations in New Jersey surface water during water years 1903-2017 Streamflow characteristics and trends at 97 continuous-record and 719 partial-record streamflow gaging stations in New Jersey surface water during water years 1903-2017
This U.S. Geological Survey (USGS) data release contains a geodatabase, shapefiles, and datasets that describe streamflow characteristics and trends in New Jersey surface water during water years 1903-2017. High-flow, low-flow, and durations statistics and trend results at 97 continuous-record gages are presented. Low-flow statistics at 719 partial-record gages with sufficient data for...
Assessment of Hydrologic Trends in Pennsylvania Assessment of Hydrologic Trends in Pennsylvania
The U.S. Geological Survey (USGS) in cooperation with the Pennsylvania Department of Conservation and Natural Resources (PA DCNR), Bureau of Geological Survey, provides time series trends results using the Mann Kendall family of analyses on select sites across Pennsylvania for baseflow, runoff, groundwater levels, and streamflow percentiles. Trend results for baseflow and runoff at 197...