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Filters Date Types (for Date Range) Types Map Service (1) OGC WFS Layer (1) OGC WMS Layer (1) OGC WMS Service (1) Contacts U.S. Geological Survey, Alaska Science Center Seth A Siefken Wyoming-Montana Water Science Center U.S. Geological Survey Water Resources More... Tag Types Theme (2) Place (2) USGS Scientific Topic Keyword (1) Harvest Set (1) Tag Schemes NASA GCMD Earth Science Keyword Thesaurus (1) USGS CSA Biocomplexity Thesaurus (1) USGS Thesaurus (1) ISO 19115 Topic Category (1) None (1) USGS Geographic Names Information System (GNIS) (1) USGS Metadata Identifier (1) More... View Results as: JSON ATOM CSV

Data and Model-Based Estimates from Black Brant (Branta bernicla nigricans) Fall Age Ratio Surveys at Izembek Lagoon, Alaska These data are in two tables relating to fall age ratios (number of juvenile birds : total birds aged) of Black Brant (Branta bernicla nigricans) staging in Izembek Lagoon, Alaska, since 1963. The first table is observation data for the age classes of Black Brant during surveys, and associated survey characteristics. The second table contains model-based estimates of age ratios by year along with Standard Error (SE), and 95% Bayesian credible intervals around estimates. Tags: Alaska, Animal populations, Animals/Vertebrates, Biota, Birds, All tags... Black Brant, Brent Goose, Computational methods, Ecological dynamics, Environment, Izembek Lagoon, Izembek National Wildlife Refuge, Mathematical modeling, Migratory birds, Population dynamics, Species life history, Species/population interactions, USGS:ASC256, Waterfowl, Wildlife biology, Fewer tags Peak-flow frequency analyses for selected streamgages in Carter, Custer, Fallon, Powder River, and Prairie Counties, Montana, based on data through water year 2022 The USGS Wyoming-Montana Water Science Center (WY–MT WSC) completed a report (Sando and McCarthy, 2018) documenting methods for peak-flow frequency analysis following implementation of the Bulletin 17C guidelines (England and others, 2019). The methods are used to provide estimates of peak-flow quantiles for 66.7-, 50-, 42.9-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEPs) for selected USGS streamgages. This data release presents peak-flow frequency analyses based on methods described by Sando and McCarthy (2018), for selected streamgages in Carter, Custer, Fallon, Powder River, and Prairie Counties, and the Powder River Basin, based on data through water year 2022. Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Boxelder, Carter County, Custer County, Fallon County, Hydrology, All tags... Little Powder, Lower Tongue, Lower Yellowstone, Middle Powder, O'Fallon, Powder River County, Prairie County, USGS Science Data Catalog (SDC), USGS-CC Natural Hazards, Upper Little Missouri, Water Resources, annual exceedance probability, computational methods, floods, hazard preparedness, hazards, hydrologic processes, hydrology, inlandWaters, peak-flow frequency, statistical analysis, stream-gage measurement, streamflow, time series analysis, watershed management, Fewer tags