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Trends in annual peak streamflow quantiles for 2,683 U.S. Geological Survey streamgages in the conterminous United States Measures used to assess trends in the 10th, 50th, and 90th quantiles of annual peak streamflow from 1916-2015 at 2,683 U.S. Geological Survey stations and within 191 4-digit HUCs in the conterminous United States. Linear quantile regression was applied to the selected quantiles of log-transformed annual peak streamflow to represent trends for a range of flood frequencies from small, common floods to large, infrequent floods. Comparative trends in pairs of quantiles were characterized as coherent, convergent, or divergent by comparing the slopes of linear quantile regression equations. Categories: Data; Tags: Alabama, Arizona, Arkansas, California, Colorado, All tags... Connecticut, Conterminous United States, Delaware, District of Columbia, Florida, Georgia, Hydrology, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, USGS Science Data Catalog (SDC), United States, Utah, Vermont, Virginia, Washington, Water Resources, West Virginia, Wisconsin, Wyoming, drought, floods, regression analysis, streamflow, surface water (non-marine), Fewer tags Pacific Northwest region ancillary supporting attribution data This child page contains ancillary information that is referenced in the report but not included in the core files that are used by all regions. The one .csv file contains the KendallTau and p.value for each station in the Pacific Northwest. Categories: Data Attributions for nonstationary peak streamflow records in the Pacific Northwest region, 1941-2015 and 1966-2015, and supporting information Pacific Northwest (PNW) Region. The U.S. Geological Survey Dakota Water Science Center, in cooperation with the Federal Highway Administration, is analyzing annual peak-flow data to determine if trends are present and provide attribution of trends where possible. This dataset contains four core comma separated values (csv) files (50-year monotonic, 75-year monotonic, 50-year change point, and 75-change point). Each of the four core csv files includes the USGS gage identifier, various statistical values, primary and secondary attribution, level of evidence, and comments/citations. The comments/citations column should include any sources, in addition to the statistical values in the csv, that were needed to decide... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Datasets, Flooding, Peak-flow, Trends, United States Spatial Framework for Network Analysis The spatial framework for the network analysis is a set of stream segments with associated land areas that they drain and monitoring sites located on the segments. Segments are related to each other through simplified routing information where each segment has one primary downstream segment (convergent flow) or is a sink (no downstream unit). Divergent flow, where a segment has more than one downstream segment (distributaries, canals) is not permitted. The framework is based on medium resolution (1:100,000) National Hydrography Dataset segments and catchments as the spatial units for the contiguous United States (CONUS) and watersheds represented by 12-digit hydrologic unit codes as the spatial units for non-CONUS... Categories: Data; Tags: United States, field monitoring stations, streamflow Priority Areas to Maintain or Add Streamflow Gages The USGS streamflow gaging network that was active in water year 2020 was analyzed for its coverage, resolution, and representation of geospatial variables indicating public interests. The priority areas to maintain or add gages for each variable were determined by applying standardized criteria to cumulative distributions of the variable for incremental gaged areas (IGAs) and for 12-digit hydrologic unit codes (HUC12) in the United States. Priorities are identified for two spatial scales: the United States and 4-digit hydrologic unit codes. Categories: Data; Tags: United States, field monitoring stations, streamflow Attributions for nonstationary peak streamflow records across the conterminous United States, 1941-2015 and 1966-2015 The U.S. Geological Survey Dakota Water Science Center, in cooperation with the Federal Highway Administration, analyzed annual peak-flow data to determine if trends are present and provide attribution of trends where possible. Work for the national trend attributions for nonstationary annual peak-flow records was broken into seven regions that are loosely based off of two-digit hydrologic unit watershed boundaries. Each of the regions made attributions for nonstationary annual peak-flow records using both monotonic trends and change point for 50 (1966-2015) and 75 (1941-2015) year trends. Each child page contains four supporting comma separated values (csv) files (50-year monotonic, 75-year monotonic, 50-year change... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Datasets, Flooding, Hydrology, Peak-flow, Trends, All tags... USGS Science Data Catalog (SDC), Water Resources, Fewer tags Network Analysis of USGS Streamflow Gages (ver. 2.0, May 2023) This data release has a workflow, data, and results of an analysis of the coverage, resolution, and representation of variables related to public interests in streamflow information by the USGS streamflow gaging network that was active in water year 2020. The workflow for the analysis is implemented as scripts and functions in the statistical programming language R. The spatial framework for the analysis is based on the enhanced National Hydrography Dataset (NHD) (medium resolution, 1:100,000 scale), 12-digit Hydrologic Unit Code (HUC12) watersheds from the Watershed Boundary Dataset, and sites where USGS operated a streamflow gage with a daily streamflow record for at least 182 days in Water Year 2020. Values of... Tags: USGS Science Data Catalog (SDC), United States, field monitoring stations, streamflow Supplemental Geospatial Data for Network Analysis These datasets have the area of NOAA climate divisions, lands managed by federal agencies, lands managed by Native American tribes by National Hydrography Dataset (NHD) catchments and NHD reaches designated as Wild and Scenic Rivers, listed a impaired for water quality, receiving major point-source discharges of wastewater, or having federal or tribal land adminstration. Categories: Data; Tags: United States, field monitoring stations, streamflow, water quality Variables Used to Evaluate the USGS Streamflow Gaging Network The USGS streamflow gaging network that was active in water year 2020 was analyzed with respect to its coverage, resolution, and representation of variables indicating national public interests in streamflow information. The variables used for the analysis are provided for incremental gaged areas (IGAs) and for 12-digit hydrologic unit codes (HUC12) in the United States where available. Plots of the cumulative distributions of the variables for the United States and the contiguous United States are provided as .png files. Categories: Data; Tags: United States, field monitoring stations, streamflow Network Analysis of USGS Streamflow Gages Note: this data release has been deprecated. Please see new data release here: https://doi.org/10.5066/P9C8NYTO. This data release has components of an analysis of the coverage, resolution, and representation of national public interests in streamflow information by the USGS streamflow gaging network that was active in water year 2020. The workflow for the analysis is implemented as scripts and functions in the statistical programming language R. The spatial framework for the analysis is based on from the National Hydrography Dataset medium resolution (1:100,000) segments, 12-digit Hydrologic Unit from the Watershed Boundary Dataset, and sites where USGS operated a streamflow gage in Water Year 2020. The analysis... Categories: Data; Tags: Hydrology, Information Sciences, United States, Water Quality, Water Resources, All tags... field monitoring stations, streamflow, Fewer tags Water Temperature Mapping of the Skykomish, Snoqualmie, and Middle Fork Snoqualmie Rivers—Longitudinal Stream Temperature Profiles and Airborne Thermal Infrared and RGB Imagery Mosaics Note: this data release has been depecrated. Find the updated version here: https://doi.org/10.5066/P9FJCM8N. The Skykomish and Snoqualmie River basins in western Washington provide spawning, rearing, and migration habitat for several salmonid species, including Endangered Species Act-listed Chinook salmon, steelhead trout, and bull trout. The production, abundance, distribution, and the health of fish and other aquatic life is strongly influenced by water temperature, which affects their physiology and behavior. The Washington State Department of Ecology establishes water temperature criteria and Total Maximum Daily Load standards for designated aquatic life uses, varying between 12 and 17.5 degrees Celsius, depending... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aerial photography, Drag-probe survey, Float survey, Geospatial analysis, Groundwater-Surface Water Interactions, All tags... Hydrology, Hydrology, King County, Middle Fork Snoqualmie River, Partnerships, Remote sensing, Skykomish River, Snohomish County, Snoqualmie River, Surface water quality, Thermal Imagery, United States, Washington, Water Quality, Water temperature, Watershed management, image mosaics, longitudinal profiles, summer, thermal infrared, Fewer tags