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Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Shapefile (1) Types Map Service (5) OGC WFS Layer (5) OGC WMS Service (4) Downloadable (1) Shapefile (1) Contacts Water Resources U.S. Geological Survey - ScienceBase Jennifer C Murphy Thomas D Byl Rodney R Knight More... Categories Data (4) Data Release - Revised (1) Tag Types Place (3) Theme (2) Harvest Set (5) USGS Scientific Topic Keyword (2) Tag Schemes None (1) USGS Thesaurus (2) Geographic Names Information System (GNIS) (1) Common geographic areas (1) Geographic Names Information System (1) ISO 19115 Topic Category (1) View Results as: JSON ATOM CSV

Water-quality trends and trend component estimates for the Nation's rivers and streams using Weighted Regressions on Time, Discharge, and Season (WRTDS) models and generalized flow normalization, 1972-2012 Nonstationary streamflow due to environmental and human-induced causes can affect water quality over time, yet these effects are poorly accounted for in water-quality trend models. This data release provides instream water-quality trends and estimates of two components of change, for sites across the Nation previously presented in Oelsner et al. (2017). We used previously calibrated Weighted Regressions on Time, Discharge, and Season (WRTDS) models published in De Cicco et al. (2017) to estimate instream water-quality trends and associated uncertainties with the generalized flow normalization procedure available in EGRET version 3.0 (Hirsch et al., 2018a) and EGRETci version 2.0 (Hirsch et al., 2018b). The procedure... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Contiguous United States and Puerto Rico, USGS Science Data Catalog (SDC), United States, biota, carbon, All tags... concentration, loads (fluxes), major ions, nutrients, rivers, salinity, sediment, streams, surface water quality, water-quality trends, Fewer tags Average well color development data for water samples from six locations within the historic section of Mammoth Cave National Park, Kentucky Water samples were collected from six cave locations where Actinobacterial mats appeared to be plentiful. Community-level physiological capabilities were evaluated using Biolog-Ecolog plates inoculated with cave water dosed with 0 or 0.10 milligrams per liter (mg/L) of erythromycin. The data were transformed into average well color development (AWCD). The transformation is done by subtracting the background color development (blank controls) and then averaging the three color readings of the same treatment on the same Biolog EcoPlate. Each EcoPlate has three replicates of 31 different substrates (potential bacterial food) that the microbial community can potentially metabolize and thereby transform a clear dye into... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Mammoth Cave National Park, USGS Science Data Catalog (SDC) Streamflow and fish community diversity data for use in developing ecological limit functions for the Cumberland Plateau, northeastern Middle Tennessee and southwestern Kentucky, 2016 This geospatial dataset includes one point feature class file and associated FGDC-compliant metadata representing datasets to support development of ecological limit functions for the Cumberland Plateau in northeastern Middle Tennessee and southeastern Kentucky. Knight and others (2012, 2014) developed a methodology of relating fish species richness to changes in hydrologic conditions for sites within the Tennessee River Basin; this dataset applies this methodology to 138 sites within the the Cumberland Plateau. Information contained within this dataset represents values of basin characteristics (see Table II in Knight and others, 2012), estimates of streamflow characteristics (see Table I in Knight and others,... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Aquatic Biology, USGS Science Data Catalog (SDC), Water Resources Geospatial data supporting assessments of streamflow alteration to support bay and estuary restoration in the Gulf States This geospatial dataset includes a one-point feature-class shapefile, one-polygon feature-class shapefile, and associated FGDC-compliant metadata to define 193 streamflow and 299 basin characteristics at 1,320 U.S. Geological Survey streamflow gaging stations. Sites included in the dataset either (1) drain to the Gulf of Mexico or (2) are adjacent to watersheds that flow to the Gulf of Mexico and are considered both physiographically similar and valuable for analysis. Drainage area to the sites varies from less than 1 to approximately 67,500 square miles. Data presented describe the streamflow regime (Rossman, 1990; Thompson and Archfield, 2014), climate (Daly and others, 2008), land use and land-use change (Sohl... Categories: Data Release - Revised; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: USGS Science Data Catalog (SDC) 7Q10 records and basin characteristics for 224 basins in South Carolina, Georgia, and Alabama (2015) This data release provides the data and R scripts used for the 2018 publication titled "Improving predictions of hydrological low-flow indices in ungaged basins using machine learning", Environmental Modeling and Software, https://doi.org/10.1016/j.envsoft.2017.12.021.. There are two .csv files and 14 R-scripts included below. The lowflow_sc_ga_al_gagesII_2015.csv datafile contains the annual minimum seven-day mean streamflow with an annual exceedance probability of 90% (7Q10) for 224 basins in South Carolina, Georgia, and Alabama. The datafile also contains 231 basin characteristics from the Gages II dataset (https://water.usgs.gov/lookup/getspatial?gagesII_Sept2011). The "all_preds.csv" file contains the leave-one-out... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alabama, Georgia, Hydrogeology, South Carolina, USGS Science Data Catalog (SDC), All tags... Water Resources, low-flow, machine learning, regionalization, statistical modeling, streamflow, Fewer tags