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Filters Date Types (for Date Range) Contacts U.S. Geological Survey U.S. Geological Survey - ScienceBase Ecosystems Lindsey J Boyle Southwest Biological Science Center More... Categories Data (12) Data Release - Revised (1) Tag Types Place (53) Tags (with Scheme=Getty Thesaurus of Geographic Names) glen canyon dam (6) district of columbia (national district) (3) maryland (state) (3) new york (state) (3) pennsylvania (state) (3) virginia (state) (3) new hampshire (2) More... View Results as: JSON ATOM CSV

Great Lakes Coastal Wetland Restoration Assessment (GLCWRA) Green Bay, U.S.: Degree Flowlines This dataset is part of the U.S. Geological Survey (USGS) Great Lakes Coastal Wetland Restoration Assessment (GLCWRA) initiative. These data represent the flowline network in the Green Bay Restoration Assessment (GBRA). It is attributed with the number of disconnections (e.g., road crossings) between the reach and Lake Ontario. The more road crossings on a flowline the more disconnected that area is from the lake and the less suitable it will be for restoration. These data help identify the condition of hydrologic separation between potential restoration areas and Lake Ontario. Low numbers represent fewer disconnections, such as culverts, between the reach and the water body requiring no flow network modification... Tags: Brown, Brown County, WI, Delta, Delta County, MI, Door, All tags... Door County, WI, Great Lakes, Green Bay, Hydrology, Kewaunee, Kewaunee County, WI, Lake Michigan, Manitowoc, Manitowoc County, WI, Marinette, Marinette County, WI, Menominee, Menominee County, MI, Michigan, Oconto, Oconto County, WI, Schoolcraft, Schoolcraft County, MI, USGS Science Data Catalog (SDC), Wisconsin, environment, hydrology, hydrology, inlandWaters, lake, lakeshore, natural resource management, remediation, resource management, river, river reaches, stream, water quality, wetland, wetland ecosystems, wetland restoration, Fewer tags Hydrodynamic model of the Colorado River, Glen Canyon Dam to Lees Ferry in Glen Canyon National Recreation Area, Arizona: tables of model results and accuracy assessment These data were compiled to provide a resource for other researchers interested in water-surface elevations and flow velocity across a wide range of discharge in the study reach for the project. Objective(s) of our study were to construct a two-dimensional hydrodynamic model for the 15.8 mile tailwater reach of the Colorado River in Glen Canyon between Glen Canyon Dam and Lees Ferry, Arizona. These data represent the results of the two-dimensional modeling effort with each data table (50) including the results of each run of the model. Additionally, other data represent a comparison of modeled water surface elevations to measured water surface elevations for historic Bureau of Reclamation cross sections in the study... Tags: Arizona, Coconino County, Colorado River, Geography, Glen Canyon, All tags... Glen Canyon Dam, Glen Canyon National Recreation Area, Hydrology, Information Sciences, Lees Ferry, USGS Science Data Catalog (SDC), USGS:6595800dd34e3265ab152e47, Water Resources, accuracy assessment, bathymetry, bathymetry measurement, bed shear stress, data release, digital elevation models, elevation, flow velocity, geomorphology, geoscientificInformation, hydraulic characteristics, hydrodynamics, hydrographic datasets, inlandWaters, mathematical modeling, shoreline extents, stream discharge, streamflow, tailwater reach, topography, two-dimensional hydrodynamic model, velocities, water depths, water surface elevation, Fewer tags Attribution of benthic macroinvertebrate sampling data to NHDPlus V2 and NHDPlus HR catchments within the Chesapeake Bay Watershed This data release links benthic macroinvertebrate sites to both the NHDPlus Version 2 and NHDPlus High Resolution Region 02 networks, hereafter referred to as V2 and HR, using the hydrolink methodology. Linked benthic macroinvertebrate sites are those included in the Chesapeake Bay Basin-wide Index of Biotic Integrity (Chessie BIBI) developed by the Interstate Commission on the Potomac River Basin (ICPRB) and available from the Chesapeake Bay Program (https://datahub.chesapeakebay.net/LivingResources). The data set contains a unique sample identifier created by ICPRB, survey program, coordinates of sample, linked V2 COMID and HR Permanent Identifier, and information regarding uncertainty in the attribution. We strongly... Categories: Data; Tags: Aquatic Biology, District of Columbia (national district), Ecology, Hydrology, Maryland (state), All tags... New York (state), Pennsylvania (state), USGS Science Data Catalog (SDC), Virginia (state), West Virginia (state), aquatic biology, aquatic ecosystems, ecology, freshwater ecosystems, hydrology, macroinvertebrates, Fewer tags Pilot Study of Per- and Polyfluoroalkyl Substances (PFAS) Infiltration to Shallow Groundwater Through Selected Soils in New Hampshire, 2023 In a study conducted by the U.S. Geological Survey (USGS) and the New Hampshire Department of Environmental Services, detectable concentrations of per- and polyfluoroalkyl substances (PFAS) were found in the soil at every site despite targeting locations with no known PFAS sources (Santangelo and others, 2022). The widespread distribution of PFAS concentrations in New Hampshire has since sparked critical interest into understanding whether recharge to groundwater contains significant concentrations of PFAS after infiltration through soils. To address this concern, the USGS implemented a pilot study designed to evaluate whether PFAS infiltrate through shallow soil into shallow groundwater. Five sites were selected... Categories: Data; Tags: Eastern United States, Environmental Health, Hydrology, New Hampshire, Northeast, All tags... PFAS, Soil Sciences, USGS Science Data Catalog (SDC), Water Quality, Water Resources, biota, chemical analysis, groundwater, hydrology, lysimeters, soil, Fewer tags Plant composition, shrub biomass, and soil biogeochemistry from an experimental drought treatment on the Colorado Plateau These data were compiled for a study that investigated the effects of drought seasonality and plant community composition in a dryland ecosystem. In 2015 U.S. Geological Survey ecologists recorded vegetation and soil moisture data in 36 experimental plots which manipulated precipitation in two plant community types. The experiment consisted of three precipitation treatments: control (ambient precipitation), cool-season drought (-66% ambient precipitation November-April), and warm-season drought (-66% ambient precipitation May-October), applied in two plant communities (perennial grasses with or without a large shrub, Ephedra viridis) over a three-year period. These data were collected from 2015 to 2022 near Canyonlands... Categories: Data; Tags: Achnatherum hymenoides, Botany, C3 photosynthesis, C4 photosynthesis, Canyonlands National Park, All tags... Climatology, Colorado Plateau, Ecology, Ephedra viridis, Geography, Indian ricegrass, Information Sciences, Islands of Fertility, James' galleta, Needles District, Pleuraphis jamesii, Soil Sciences, USGS Science Data Catalog (SDC), USGS:6553a618d34ee4b6e05c3e2b, Utah, ambient precipitation, biogeochemical cycling, biogeochemical data, biogeochemistry, biomass, biota, carbon, carbon concentrations, control treatments, cool-season drought treatments, data release, drought seasonality, droughts, dryland ecosystems, ecosystems, experimental plots, experimental seasonal drought, field inventory and monitoring, field measurements, field sampling, geoscientificInformation, interspace cover estimates, mormon tea, nitrogen, nitrogen concentrations, percent cover estimates, perennial grasses, phosphorus, phosphorus concentrations, photosynthesis, plant community composition, plants (organisms), precipitation (atmospheric), precipitation treatments, shrubland ecosystems, soil cores, soil moisture, soil sciences, soil volumetric water content, southeastern Utah, vegetation, warm-season drought treatments, Fewer tags Statewide survey of shallow soil concentrations of per- and polyfluoroalkyl substances (PFAS) and related chemical and physical data across New Hampshire, 2021 Per- and polyfluoroalkyl substances (PFAS) and related chemical and physical data are presented from 100 shallow soil sampling locations within the State of New Hampshire. Sites were randomly determined through an equal-area grid approach (Scott, 1990) targeting undisturbed areas, which included lands classified by the 2016 National Land Cover Database (Dewitz, 2019) as forested, shrubland, scrubland, grassland, herbaceous, wetlands, or barren land. Sampling sites were located at the closest point to the random location identified, where access and permission were available. To limit the potential for sampling results to be influenced by local releases of PFAS, a 500-meter buffer around parcels associated with known... Categories: Data; Tags: Environmental Health, New Hampshire, PFAS, Soil Sciences, USGS Science Data Catalog (SDC), All tags... Water Resources, soil chemistry, soil horizons, soil sciences, Fewer tags Plant habitat suitability modeling for the Colorado River in Grand Canyon, Arizona under different management scenarios for Lake Powell releases These data were compiled to assess potential impacts of altered operations of Glen Canyon Dam on riparian plant resources. Objective(s) of our study were to quantify potential responses of specific vegetation metrics. These data represent predicted changes in vegetation metrics based on the data in the Interim Guidelines and LTEMP_SEIS folders. These data were collected in Grand Canyon and Glen Canyon below the dam from 2014-2019. These data were collected by USGS SBSC scientists through ground-based vegetation surveys. These data can be used to predict responses of vegetation metrics only to the specific alterations to dam operations that were simulated. Tags: Arizona, Botany, Coconino County, Colorado River, Ecology, All tags... Geography, Glen Canyon, Glen Canyon Dam, Grand Canyon, Information Sciences, Lake Powell, USGS Science Data Catalog (SDC), Water Resources, biodiversity, biogeography, biological and physical processes, biota, data release, ecology, environment, inlandWaters, modeling, natural resources, organisms, population and community ecology, reports, Fewer tags Lake Erie Fish Community Data, 2013-2023 Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management, the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western basin of Lake Erie, to assess seasonal and spatial distributions of fishes in tandem with water quality information, and to assess year class strength. A systematic grid sampling approach with 41 stations was sampled via bottom trawl during June (Spring) and September (Autumn), starting in 2013. This data release adds 2023 data to... Categories: Data; Tags: Aquatic Biology, Ecology, Lake Erie, Limnology, Michigan, All tags... Ohio, Ontario, USGS Science Data Catalog (SDC), bottom trawl survey, farming, field sampling, freshwater ecosystems, oceans, population dynamics, Fewer tags Environmental, biological, and leaf litter decomposition data in the Colorado River downstream of Glen Canyon Dam between 1998 and 2022 Yes, all data values are reasonable and within the valid range for measurement. The data release consists of 15 tabular data files (csv). These data were compiled to compare patterns and potential drivers of leaf litter decomposition in the Colorado River downstream of Glen Canyon Dam between 1998 and 2022. Objective(s) of our study were to compare the breakdown of cottonwood (Populus fremontii), willow (Salix exigua), and salt cedar (Tamarix chinensis) leaves to a previous decomposition experiment from 1998 (Pomeroy et al. 2000) that was conducted in the context of much cooler water temperatures, higher phosphorus concentrations, lower New Zealand mudsnail densities, and salt cedar litter that was unaffected by... Categories: Data; Tags: Aquatic Biology, Arizona, Colorado River, Ecology, Geography, All tags... Glen Canyon Dam, Hydrology, Information Sciences, Lake Powell, New Zealand mudsnail, Populus fremontii, Salix exigua, Tamarix chinensis, USGS Science Data Catalog (SDC), USGS:6500d7ead34ed30c20580390, Water Resources, air temperature, beetle, biochemistry, biomass, biota, climatologyMeteorologyAtmosphere, community composition, community ecology, cottonwood, data release, decay rates, decomposition, detritus, environment, field data, field experiments, field sampling, growth, inlandWaters, invasive species, invertebrates, laboratory experiments, leaf, leaf litter, leaf litter chemistry, leaf litter mass, leaf mass, leaf nutrient content, leaf pack, litter, nutrient content (water), phosphorus, physicochemical variable, population and community ecology, relative abundance analysis, reservoir storage, river ecosystems, saltcedar, stream discharge, vegetation, warming, water chemistry, water nutrient data, water temperature, willow, Fewer tags Array detections and physical captures for three native fishes in the Little Colorado River in Grand Canyon, AZ These data were compiled to monitor native fishes (particularly humpback chub Gila cypha) in the Little Colorado River, in the Grand Canyon, AZ. Objective(s) of our study were to evaluate the timing of native fish migration and the abundance of migratory and resident fishes between the Colorado and Little Colorado Rivers in the Grand Canyon. These data represent encounter histories for fishes - including array detections and physical captures. These data were collected in the lower 13.56 river kilometers of the Little Colorado River in April and May of 2021 and 2022. These data were collected by U.S. Fish and Wildlife Service (physical captures) and U.S. Geological Survey (array detections). These data can be used... Categories: Data; Tags: Aquatic Biology, Arizona, Arizona, Colorado River, Ecology, All tags... Geography, Grand Canyon, Information Sciences, Little Colorado River, USGS Science Data Catalog (SDC), Wildlife Biology, array detections, biota, bluehead sucker, data release, encounter histories, field inventory and monitoring, field sampling, fish, flannelmouth sucker, humpback chub, inlandWaters, marking status, migration (organisms), migration timing, native species, partial migration, physical captures, size categories, spawning migration, tributaries, Fewer tags Subaerially exposed river sand and reservoir shoreline modelling for Lake Powell releases and changes in Lake Powell and Lake Mead storage These data were compiled to evaluate impacts of different reservoir management scenarios on sand exposure for aeolian landscape and cultural site resources. Objective of our study was to predict areas of dry, bare Colorado River sand as a function of different management alternative scenarios. These data represent predictions of dry, bare sand for the reach of the Colorado River between Glen Canyon Dam and Bright Angel Creek in Grand Canyon National Park. These data were created during 2023 by the U.S. Geological Survey, Southwest Biological Science Center, Grand Canyon Monitoring and Research Center. These data can be used to understand how the area of sand available for windblown transport might be impacted different... Tags: Arizona, Coconino County, Colorado River, Ecology, Geography, All tags... Geomorphology, Glen Canyon, Glen Canyon Dam, Grand Canyon, Hydrology, Information Sciences, Lake Powell, Sedimentology, USGS Science Data Catalog (SDC), Water Resources, aeolian, archaeology, cultural, dam, data release, freshwater ecosystems, geomorphology, geoscientificInformation, inlandWaters, modeling, reservoir, river systems, sand deposits, sedimentation, subaerial, unconsolidated deposits, Fewer tags Invertebrate, fish, and habitat data collected within the greater Fountain Creek Basin, Colorado (version 4.0, March 2024) Invertebrate, fish, and habitat data were collected as part of a cooperative project that began in 2002 between the U.S. Geological Survey, Colorado Springs Utilities, and Colorado Springs Engineering. Other entities have contributed to the project over the years including Colorado Parks and Wildlife. Data were primarily collected from up to 35 sites – 33 sites within the Fountain Creek Basin but also from two sites on the Arkansas River. The number of sites sampled each year as well as the number of annual visits during which data were collected, and sampling methods used during each visit vary. Data were collected between 2002 and 2023 and is intended to be updated annually as new data are collected and available.... Categories: Data; Tags: Aquatic biology, Benthic environments, Colorado, Community ecology, Ecology, All tags... Rivers, USGS Science Data Catalog (SDC), United States, aquatic biology, aquatic ecosystems, ecology, invertebrates, surface water (non-marine), Fewer tags Attribution of stream habitat assessment data to NHDPlus V2 and NHDPlus HR catchments within the Chesapeake Bay Watershed This data release links habitat assessment sites to both the NHDPlus Version 2 and NHDPlus High Resolution Region 02 networks using the hydrolink methodology. Linked habitat sites are those compiled by the Interstate Commission on the Potomac River Basin (ICPRB) during creation of the Chesapeake Bay Basin-wide Index of Biotic Integrity (Chessie BIBI) for benthic macroinvertebrates (https://datahub.chesapeakebay.net/LivingResources). The data set contains a unique sample identifier created by ICPRB, survey program, coordinates of sample, linked V2 COMID and HR Permanent Identifier, and information regarding uncertainty in the attribution. We strongly caution the use of sampling points with attribution uncertainty... Categories: Data; Tags: Delaware (state), District of Columbia (national district), Maryland (state), New York (state), Pennsylvania (state), All tags... Physical Habitats and Geomorphology, USGS Science Data Catalog (SDC), Virginia (state), West Virginia (state), environment, freshwater ecosystems, geomorphology, habitats, none, physical and chemical characteristics of habitats, Fewer tags Dissolved oxygen predictions for releases from Lake Powell under different management scenarios for Lake Powell releases Dissolved oxygen estimates were generated to help understand how different alternative management scenarios may affect the likelihood of low dissolved oxygen in Glen Canyon Dam releases. The study aimed to examine the effects of different management alternatives on late summer and early fall dissolved oxygen concentrations in Glen Canyon Dam releases. The estimates represent estimates of dissolved oxygen concentration in Glen Canyon Dam releases between August and October of a given year. These estimates were generated using data collected in Lake Powell reservoir as part of a long-term inter-agency water quality monitoring program conducted by the Bureau of Reclamation, the National Park Service, and the U.S. Geological... Tags: Arizona, CTD measurement, Coconino County, Colorado River, Ecology, All tags... Geochemistry, Geography, Glen Canyon, Glen Canyon Dam, Glen Canyon Dam National Recreation Area, Grand Canyon, Hydrology, Information Sciences, Lake Powell, Limnology, USGS Science Data Catalog (SDC), Wahweap Bay, Water Quality, Water Resources, arid reservoir, data release, dissolved oxygen, environment, eutrophication, field inventory and monitoring, field monitoring stations, freshwater ecosystems, inlandWaters, oxygen content (water), surface water quality, Fewer tags Predicting sediment responses to different management scenarios for Lake Powell releases These data were compiled for/to modeling to assess impact of management scenarios on Colorado River sediment resources. Objective(s) of our study were to assess impact of management scenarios on Colorado River sediment resources. These data represent model results for high flow experiment timing/duration, sand mass balance, sandbar volume, based on the data in the Interim Guidelines SEIS and LTEMP SEIS folders. These data were generated in 2023-2024 and are model simulations of Colorado River sediment resources downstream of Glen Canyon dam. These data were created by the U.S. Geological Survey, Southwest Biological Science Center, Grand Canyon Monitoring & Research Center with models generated and codes written/adapted... Categories: Data; Tags: Arizona, Coconino County, Colorado River, Ecology, Geography, All tags... Geomorphology, Glen Canyon, Glen Canyon Dam, Grand Canyon, Hydrology, Information Sciences, Lake Powell, Sedimentology, USGS Science Data Catalog (SDC), Water Resources, data release, earth sciences, environment, geology, geomorphology, hydrology, inlandWaters, mathematical modeling, sedimentology, time series analysis, time series datasets, water resources, Fewer tags Northern Nevada aspen (Populus tremuloides) data (2010-2011) (ver. 2.0, January 2024) This dataset contains two phases of research. The first dataset includes several variables that were sampled across aspen stands in the Santa Rosa, Ruby, and Jarbidge mountain ranges (Great Basin, Northern Nevada, USA) in 2010 and 2011. Across 101 aspen sites, several plot-level attributes were collected (e.g. elevation, slope, aspen stand type). For each plot, data describing live trees (both those less than 7.5 cm diameter and those greater than/equal to 7.5 cm) are included, such as species, diameter, and age. The data set also includes information for dead trees greater than/equal to 7.5 cm diameter (e.g. species, location, diameter). The second dataset includes tree ring measurements (for live trees greater... Categories: Data, Data Release - Revised; Tags: Great Basin, Jarbidge Mountains, Nevada, Ruby Mountains, Santa Rosa Mountains, All tags... USGS Science Data Catalog (SDC), atmospheric and climatic processes, biota, climate variability, dendrochronology, environment, fires, forest ecosystems, succession (biological), tree ring analysis, vegetation, Fewer tags Attribution of fish sampling data to NHDPlus HR catchments within the Chesapeake Bay Watershed This data release links fish survey data from a suite of programs in the Chesapeake Bay watershed to the NHDPlus High Resolution Region 02 networks, hereafter referred to as NHDPlusHR. The data set contains site name, survey program, coordinates of sample, ancillary information such as sample date and site location information where available, and HR Permanent Identifier. It also includes a confidence classification category for each of NHD assignment based on a set of pre-determined rules. In total there were 15 confidence categories ranging from high confidence to low confidence. We caution the use of sampling points which were given anything other than "high" confidence in their assignment to a given NHD catchment/flowline... Categories: Data; Tags: Aquatic Biology, District of Columbia (national district), Ecology, Hydrology, Maryland (state), All tags... New York (state), Pennsylvania (state), USGS Science Data Catalog (SDC), Virginia (state), West Virginia (state), aquatic biology, aquatic ecosystems, biota, ecology, freshwater ecosystems, hydrology, ichthyology, Fewer tags