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Filters Date Range Past year (43) Past month (5) Past week (2) Past day (0) Custom range... To   Search Extensions Shapefile (108) ArcGIS REST Service (48) Raster (3) ArcGIS Service Definition (2) Citation (1) OGC Web Service (1) Project (1) Types Map Service (229) OGC WMS Layer (228) OGC WMS Service (122) Downloadable (111) Shapefile (108) More... Contacts U.S. Geological Survey - ScienceBase U.S. Geological Survey U.S. Geological Survey Dana Infante Christopher A Mason More... Categories Data (190) Data Release - Revised (8) Image (7) pre-SM502.8 (5) Data Release - In Progress (4) Project (1) Publication (1) Tag Types Place (221) Theme (212) place (8) CatalogFilter Data Theme (51) USGS Scientific Topic Keyword (33) theme (10) Harvest Set (54) More... Tag Schemes None (106) none (64) USGS Biocomplexity Thesaurus (53) Geographic Names Information System (7) USGS Thesaurus (54) Common geographic areas (26) U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, D. C., NIST (6) More... View Results as: JSON ATOM CSV

Chesapeake Bay Watershed 2011 Edition Land Cover Data Release The US Geological Survey Chesapeake Bay Watershed Land Cover Data Series, 2011 edition, (CBLCD-e11) consists of Level I Land Cover data for the years 1984, 1992, 2001, 2006 and 2011. It consists of a series of five 8-bit unsigned integer raster data files of 30 meter spatial resolution in Albers Conic Equal Area projection, NAD83 datum. The 1984 – 2006 data layers were created by aggregating most Level II Anderson classes of the USGS CBLCD Land Cover Data Series released in 2010 (Irani and Claggett, 2010). Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CBLCD, Chesapeak Bay watershed, Chesapeake Bay, Chesapeake Bay Program, Chesapeake Bay Watershed, All tags... Delaware, District of Columbia, Estuarine, Estuary, Impaired Waters, Land Change, Land Cover, Land Use, Land Use Change, Maryland, New York State, Pennsylvania, Virginia, West Virginia, environment, estuary, geoscientificInformation, inlandWaters, Fewer tags Elevation artifacts in digital bathymetric and topographic models for United States east (east_cdem_v1.tif) and west (west_cdem_v.tif) coasts (polygon shapefile, geographic, NAD83) Investigations of coastal change and coastal resources often require continuous elevation profiles from the seafloor to coastal terrestrial landscapes. Differences in elevation data collection in the terrestrial and marine environments result in separate elevation products that may not share a vertical datum. This data release contains the assimilation of multiple elevation products into a continuous digital elevation model at a resolution of 3-arcseconds (approximately 90 meters) from the terrestrial landscape to the seafloor for the contiguous U.S., focused on the coastal interface. All datasets were converted to a consistent horizontal datum, the North American Datum of 1983, but the native vertical datum for... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alabama, CMGP, California, Canadian Hydrographic Service, Chesapeake Bay, All tags... Coastal and Marine Geology Program, Connecticut, DEM, Delaware, Depth, Florida, Florida Keys, Georgia, Gulf of Maine, Gulf of Mexico, Long Island, Louisiana, Maine, Maryland, Massachusetts, Middle Atlantic Bight, Mississippi, NED, NOAA, National Oceanic and Atmospheric Association, New England, New Jersey, New York, North Carolina, Northwestern Atlantic Ocean, Oregon, Puget Sound, South Atlantic Bight, South Carolina, Texas, U.S. Geological Survey, USGS, United States, Vector data, Virginia, WHCMSC, Washington, Woods Hole Coastal and Marine Science Center, digital elevation models, geoscientificInformation, land surface characteristics, oceans, Fewer tags South Dakota: NFHAP 2010 HCI Scores and Disturbances This shapefile contains landscape factors representing human disturbances summarized to local and network catchments of river reaches for the state of South Dakota. This dataset is the result of clipping the feature class 'NFHAP 2010 HCI Scores and Human Disturbance Data for the Conterminous United States linked to NHDPLUSV1.gdb' to the state boundary of South Dakota. Landscape factors include land uses, population density, roads, dams, mines, and point-source pollution sites. The source datasets that were compiled and attributed to catchments were identified as being: (1) meaningful for assessing fish habitat; (2) consistent across the entire study area in the way that they were assembled; (3) representative of... Categories: Data; Types: ArcGIS REST Map Service, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Anthropogenic factors, Aquatic habitats, Atlantic Coast FHP, Catchment areas, Connecticut, All tags... DC, Delaware, Environmental conditions, Florida, Georgia, Habitat suitability, Inland water environments, Landscape ecology, Linked to the National Hydrography Dataset Plus (1:100,000), Maine, Maryland, Massachusetts, National Assessment Data, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, River basins, Rivers, South Carolina, Spatial Data, Stream Characterization, Streams, Vermont, Virginia, Water quality measurement, West Virginia, Fewer tags Georgia: NFHAP 2010 HCI Scores and Disturbances This shapefile contains landscape factors representing human disturbances summarized to local and network catchments of river reaches for the state of Georgia. This dataset is the result of clipping the feature class 'NFHAP 2010 HCI Scores and Human Disturbance Data for the Conterminous United States linked to NHDPLUSV1.gdb' to the state boundary of Georgia. Landscape factors include land uses, population density, roads, dams, mines, and point-source pollution sites. The source datasets that were compiled and attributed to catchments were identified as being: (1) meaningful for assessing fish habitat; (2) consistent across the entire study area in the way that they were assembled; (3) representative of conditions... Categories: Data; Types: ArcGIS REST Map Service, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Anthropogenic factors, Aquatic habitats, Atlantic Coast FHP, Catchment areas, Connecticut, All tags... DC, Delaware, Environmental conditions, Florida, Georgia, Habitat suitability, Inland water environments, Landscape ecology, Linked to the National Hydrography Dataset Plus (1:100,000), Maine, Maryland, Massachusetts, National Assessment Data, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, River basins, Rivers, South Carolina, Spatial Data, Stream Characterization, Streams, Vermont, Virginia, Water quality measurement, West Virginia, Fewer tags Louisiana: NFHAP 2010 HCI Scores and Disturbances This shapefile contains landscape factors representing human disturbances summarized to local and network catchments of river reaches for the state of Louisiana. This dataset is the result of clipping the feature class 'NFHAP 2010 HCI Scores and Human Disturbance Data for the Conterminous United States linked to NHDPLUSV1.gdb' to the state boundary of Louisiana. Landscape factors include land uses, population density, roads, dams, mines, and point-source pollution sites. The source datasets that were compiled and attributed to catchments were identified as being: (1) meaningful for assessing fish habitat; (2) consistent across the entire study area in the way that they were assembled; (3) representative of conditions... Categories: Data; Types: ArcGIS REST Map Service, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Anthropogenic factors, Aquatic habitats, Atlantic Coast FHP, Catchment areas, Connecticut, All tags... DC, Delaware, Environmental conditions, Florida, Georgia, Habitat suitability, Inland water environments, Landscape ecology, Linked to the National Hydrography Dataset Plus (1:100,000), Maine, Maryland, Massachusetts, National Assessment Data, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, River basins, Rivers, South Carolina, Spatial Data, Stream Characterization, Streams, Vermont, Virginia, Water quality measurement, West Virginia, Fewer tags Chesapeake Bay River Input Monitoring Network 1985-2019: WRTDS output data Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay River Input Monitoring Network (RIM) stations for the period 1985 through 2019. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted Regression on Time, Discharge, and Season). The load results represent the total mass of nitrogen, phosphorus, and suspended sediment that was exported from each of the RIM watersheds. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Chesapeake Bay Watershed, Delaware, Maryland, New York, Pennsylvania, All tags... United States, Virginia, WRTDS, Washington DC, West Virginia, load analysis, nitrogen, nutrients, phosphorus, rivers, suspended sediment, trends, water quality, weighted regression, Fewer tags National Fish Habitat Action Plan (NFHAP) 2010 HCI Scores and Human Disturbance Data (linked to NHDPLUSV1) for Desert Fish Habitat Partnership This shapefile contains landscape factors representing human disturbances summarized to local and network catchments of river reaches for the Desert Fish Habitat Partnership. This dataset is the result of clipping the feature class 'NFHAP 2010 HCI Scores and Human Disturbance Data for the Conterminous United States linked to NHDPLUSV1.gdb' to the boundary of the Desert Fish Habitat Partnership. Landscape factors include land uses, population density, roads, dams, mines, and point-source pollution sites. The source datasets that were compiled and attributed to catchments were identified as being: (1) meaningful for assessing fish habitat; (2) consistent across the entire study area in the way that they were assembled;... Categories: Data; Types: ArcGIS REST Map Service, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Anthropogenic factors, Aquatic habitats, Atlantic Coast FHP, Catchment areas, Connecticut, All tags... DC, Delaware, Environmental conditions, Florida, Georgia, Habitat suitability, Inland water environments, Landscape ecology, Linked to the National Hydrography Dataset Plus (1:100,000), Maine, Maryland, Massachusetts, National Assessment Data, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, River basins, Rivers, South Carolina, Spatial Data, Stream Characterization, Streams, Vermont, Virginia, Water quality measurement, West Virginia, Fewer tags Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2018 (ver. 2.0, May 2020) Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay Nontidal Network (NTN) stations for the period 1985 through 2018. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted Regression on Time, Discharge, and Season). The load results represent the total mass of nitrogen, phosphorus, and suspended sediment that was exported from each of the NTN watersheds. To determine the trend in loads, the annual load results are flow normalized to integrate out the year-to-year variability in river discharge.... Categories: Data, Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Chesapeake Bay Watershed, Delaware, Maryland, New York, Pennsylvania, All tags... USGS Science Data Catalog (SDC), United States, Virginia, WRTDS, Washington DC, West Virginia, load analysis, nitrogen, nutrients, phosphorus, rivers, suspended sediment, trends, water quality, weighted regression, Fewer tags Basin polygons and characteristics, site information, results of flood-frequency analysis, and results of Bayesian weighted least-squares / Bayesian generalized least-squares (B-WLS/B-GLS) analysis for 183 streamgages operated by the U.S. Geological Survey in parts of hydrologic unit 02 in eastern New York and Pennsylvania and the surrounding states of Connecticut, Maryland, Massachusetts, New Jersey, Vermont, Virginia, and West Virginia This dataset is a geographic information systems shapefile containing basin polygons, site information, basin characteristics, results of flood-frequency analysis, and results of Bayesian weighted least-squares / Bayesian generalized least-squares (B-WLS/B-GLS) analysis for 183 streamflow gaging stations (streamgages) operated by the U.S. Geological Survey (USGS) in parts of hydrologic unit 02 (mid-Atlantic region) in eastern New York and Pennsylvania and the surrounding states of Connecticut, Maryland, Massachusetts, New Jersey, Vermont, Virginia, West Virginia that were used to estimate regional skewness of annual peak flows. Bayesian weighted least-squares / Bayesian generalized Least-Squares (B-WLS/B-GLS) regression... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bayesian regression, Connecticut, Maryland, Massachusetts, Mid-Atlantic Region - 2-digit Hydrologic Unit Code - 02, All tags... New Jersey, New York, Pennsylvania, Vermont, Virginia, West Virginia, basin characteristics, regional skew, Fewer tags Compilation of Geologic and Seismic Velocity Characteristics at Advanced National Seismic System Strong Motion Accelerometer Sites Near-surface site characteristics are critical for accurately modeling ground motion, which in turn influences seismic hazard analysis and design of critical infrastructure. Currently, there are many strong motion accelerometers within the Advanced National Seismic System (ANSS) that are missing this information. We use a Geographic Information Systems (GIS) based framework to intersect the site coordinates of approximately 5,500 ANSS accelerometers located throughout the United States and its territories with geology and velocity information. We consider: (1) surficial geology from digitized geologic maps (Horton, 2017; Wilson et al., 2015; Sherrod et al., 2007; Bawiec, 1999; Saucedo, 2005; Bedrossian et al., 2012;... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ANSS, Alabama, American Samoa, Arizona, Arkansas, All tags... California, Colorado, Connecticut, Delaware, Florida, Geography, Geophysics, Georgia, Guam, Idaho, Illinois, Indiana, Information Sciences, 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, Remote Sensing, Rhode Island, Seismic site characteristics, Seismology, Soil Sciences, South Carolina, South Dakota, Strong Motion, Structural Geology, Tennesee, Texas, USGS Science Data Catalog (SDC), United States, Utah, Vermont, Virginia, Vs30, Washington, West Virginia, Wisconsin, Wyoming, earthquake seismology, seismic stations, vs30 measurements, vs30 proxy, Fewer tags Upper Freeport Coal Bed Point Data (Geology) in Pennsylvania, Ohio, West Virginia, and Maryland This dataset is a point coverage of attributes on data location, thickness of the Upper Freeport coal bed, and its elevation, in feet. The file is also found as an ASCII Appendix of Chapter D, Disc 1 found elsewhere in Professional Paper 1625-C. Categories: Data, pre-SM502.8; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: ALLEGANY County MD, ALLEGHENY County PA, ARMSTRONG County PA, ATHENS County OH, Appalachians, All tags... BARBOUR County WV, BEAVER County PA, BEDFORD County PA, BELMONT County OH, BROOKE County WV, BUTLER County PA, CAMBRIA County PA, CARROLL County OH, CLARION County PA, CLEARFIELD County PA, COLUMBIANA County OH, COSHOCTON County OH, ELK County PA, FAYETTE County PA, GALLIA County OH, GARRETT County MD, GRANT County WV, GREENE County PA, GUERNSEY County OH, HANCOCK County WV, HARRISON County OH, HARRISON County WV, HOCKING County OH, HOLMES County OH, INDIANA County PA, JACKSON County WV, JEFFERSON County OH, LAWRENCE County OH, LAWRENCE County PA, LEWIS County WV, MAHONING County OH, MARION County WV, MARSHALL County WV, MEIGS County OH, MINERAL County WV, MONONGALIA County WV, MONROE County OH, MORGAN County OH, MUSKINGUM County OH, Maryland, Maryland Geological Survey, NOBLE County OH, OHIO County WV, Ohio, Ohio Division of Geological Survey, PERRY County OH, PRESTON County WV, Pennsylvania, Pennsylvania Bureau of Topographic and Geologic Survey, SOMERSET County PA, STARK County OH, TAYLER County WV, TUCKER County WV, TUSCARAWAS County OH, UPSHUR County WV, USGS, USGS Science Data Catalog (SDC), VINTON County OH, WASHINGTON County OH, WASHINGTON County PA, WESTMORELAND County PA, West Virginia, West Virginia Geological and Economic Survey, appbasincoal, bituminous, coal, coal, coal resources, coal thickness, isopach, nca2000, outcrop, ufreepb, Fewer tags Ports of the United States This map layer shows major ports in the United States, Puerto Rico, and the U.S. Virgin Islands. A port is a city, town, or urban area with a harbor where ships load or unload. This is a revised version of the July 2012 map layer. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Academics & scientific researchers, Alabama, Arizona, Arkansas, California, All tags... Colorado, Connecticut, Conservation NGOs, Data, Delaware, District of Columbia, EARTH SCIENCE > HUMAN DIMENSIONS > INFRASTRUCTURE > TRANSPORTATION, Federal resource managers, Florida, Georgia, Harbors, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, LCC Network Science Catalog, 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, Ports, Puerto Rico, Regional & county planners, Rhode Island, South Carolina, South Dakota, State agencies, Tennessee, Texas, Transportation, U.S. Virgin Islands, US, United States, Utah, Vermont, Virgin Islands, Virginia, Washington, West Virginia, Wisconsin, Wyoming, completed, transportation, Fewer tags National Wetlands Inventory - Wetlands This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the United States and its Territories. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Academics & scientific researchers, Alabama, Alabama, Alaska, Arizona, All tags... Arkansas, California, Coastal waters, Coastal waters, Colorado, Connecticut, Conservation NGOs, Data, Deepwater habitats, Deepwater habitats, Delaware, District of Columbia, EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > WETLANDS, Federal resource managers, Florida, Florida, Floridia, Georgia, Guam, Hawaii, Hydrography, Hydrography, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, LCC Network Science Catalog, Louisiaina, Louisiana, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Mississippi, Missouri, Montana, NWI, NWI, National Wetlands Inventory, National Wetlands Inventory, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Regional & county planners, Rhode Island, Saipan, South Carolina, South Dakota, State agencies, Surface water, Surface water, Swamps, marshes, bogs, fens, Swamps, marshes, bogs, fens, Tennessee, Texas, Texas, U.S. Fish and Wildlife Service, U.S. Fish and Wildlife Service, USFWS, USFWS, United States, Utah, Vermont, Virgin Islands, Virginia, Washington, West Virginia, Wetlands, Wetlands, Wisconsin, Wyoming, completed, environment, environment, geoscientificInformation, geoscientificInformation, inlandWaters, inlandWaters, oceans, oceans, Fewer tags Chesapeake Bay Nontidal Network 1985 – 2018: Daily High-Flow and Low-Flow Concentration and Load Estimates (ver. 1.1, November 2021) Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay Nontidal Network (NTN) stations for the period 1985 through 2018 Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted Regression on Time, Discharge, and Season). A recently published extension of WRTDS allows users to separate these estimates into high- and low-flow conditions. This data release contains (1) a table of daily high- and low-flow concentration and load estimates for NTN stations between 1985 - 2018 and (2) an R file that contains... Categories: Data, Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Chesapeake Bay Watershed, Delaware, Maryland, New York, Pennsylvania, All tags... USGS Science Data Catalog (SDC), United States, Virginia, WRTDS, Washington DC, West Virginia, flow separation, load analysis, nitrogen, nutrients, phosphorus, rivers, suspended sediment, trends, water quality, weighted regression, Fewer tags Polychlorinated Biphenyl (PCB) Concentrations of Passive Samplers, Solids, Fat, Oil, and Greases (FOG), and Road Sediments; and Dissolved Organic Carbon (DOC), Total Suspended Solids (TSS), and Particulate Organic Carbon (POC) Concentrations in the Back River Watershed, Baltimore City, Maryland, 2018-2020 This metadata record contains 6 tables used to assess sources of Polychlorinated Biphenyls (PCB) in the Back River watershed, Baltimore City, Maryland. Included in the dataset are PCB concentrations of surface water and porewater passive samplers from Herring Run, Moores Run, tidal Back River, and Back River Wastewater Treatment Plant; PCB concentrations of bed sediments and other solids, Fat, Oil, and Grease (FOG) samples, and road sediments; dissolved organic carbon (DOC), total suspended solids (TSS), and particulate organic carbon (POC) concentrations of grab samples; and PCB concentrations of passive samplers from pump stations collected in 2018-2020. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Back River, Back River Wastewater Treatment Plant, Back River Watershed, Baltimore City, Environmental Health, All tags... Herring Run, Hydrology, Maryland, Moores Run, Passive Sampling, Polychlorinated biphenyls, USGS Science Data Catalog (SDC), Water Quality, contamination and pollution, environment, geoscientificInformation, industrial pollution, inlandWaters, nonpoint-source pollution, sediment, Fewer tags Digital elevations and extents of regional hydrogeologic units in the Northern Atlantic Coastal Plain aquifer system A digital model of the sedimentary Northern Atlantic Coastal Plain aquifer system is composed of 20 rasters and hydrogeologic unit extent polygons. Rasters describe the top elevations of regional aquifers and confining units at a resolution of 2640 feet (1/2 mile). The rasters are clipped to the extent polygons, which represent the spatial extents of the hydrogeologic units onshore and several miles offshore. This three-dimensional hydrogeologic model was constructed as part of a U.S. Geological Survey Groundwater Resources Program study of groundwater availability in the Northern Atlantic Coastal Plain (NACP) aquifer system, including parts of New York, New Jersey, Delaware, Maryland, Virginia, and North Carolina.... Categories: Data, Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquia aquifer, Delaware, Delmarva Peninsula, Eastern Shore, Fall Line, All tags... Fall Zone, Groundwater and Streamflow Information Program, Hydrogeology, Lower Chesapeake aquifer, Magothy aquifer, Maryland, Matawan aquifer, Monmouth-Mount Laurel aquifer, New Jersey, New York, North Carolina, Northern Atlantic Coastal Plain, Northern Atlantic Coastal Plain aquifer system, Piney Point aquifer, Potomac-Patapsco aquifer, Potomac-Patuxent aquifer, USGS Science Data Catalog (SDC), Upper Chesapeake aquifer, Virginia, confined, elevations, heterogeneous, hydrogeologic framework, hydrogeologic units, inlandWaters, surficial aquifer, unconfined, unconsolidated, Fewer tags Water-quality trends for rivers and streams in the Delaware River Basin using Weighted Regressions on Time, Discharge, and Season (WRTDS) models, Seasonal Kendall Trend (SKT) tests, and multisource data, Water Year 1978-2018 (input data) The datasets provided here are the input data used to run the Seasonal Kendall Trend (SKT) tests and Weighted Regressions on Time, Discharge, and Season (WRTDS) models. SKT tests use "annualSamplingFreqs_allSites.csv" and "wqData_screenedSitesAll.csv" which includes, for all site-parameter combinations, information on annual sampling frequencies and the screened water-quality data, respectively. The WRTDS models use "DRB.wqdata.20200521.csv", "DRB.flow.20200610.zip", and "DRB.info.20200521.csv" for calibration which includes, for all site-parameter combinations, the water-quality data, streamflow data (as separate .csv files for each site), model specifications and site information, respectively. The multisource... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ammonia, Calcium, Chloride, Delaware, Delaware River, All tags... Magnesium, Major ions, Maryland, New Jersey, New York, Nitrate, Orthophosphate, filtered, Orthophosphate, unfiltered, Pennsylvania, Potassium, Seasonal Kendall trend test (SKT), Sodium, Specific conductance, Sulfate, Suspended sediment concentration, Total dissolved solids, Total nitrogen, Total phosphorus, Total suspended solids, Water Quality, Water Quality Water Analysis, Water-Quality Parameters, Weighted regressions on time, discharge and season (WRTDS), environment, nutrient content (water), salinity, suspended material (water), Fewer tags Coastal wetlands of the Blackwater region, Chesapeake Bay, Maryland Note: The 2022 data release "Geospatial Characterization of Salt Marshes in Chesapeake Bay" incorporates the Blackwater region salt marsh dataset. (https://doi.org/10.5066/P997EJYB) This data release contains coastal wetland synthesis products for the geographic region of Blackwater, Chesapeake Bay, Maryland. Metrics for resiliency, including unvegetated to vegetated ratio (UVVR), marsh elevation, and others, are calculated for smaller units delineated from a digital elevation model, providing the spatial variability of physical factors that influence wetland health. The U.S. Geological Survey has been expanding national assessment of coastal change hazards and forecast products to coastal wetlands with the intent... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Blackwater National Wildlife Refuge, Chesapeake Bay, Dorchester County, Fishing Bay, Honga River, All tags... Maryland, Nanticoke River, United States, Wicomico County, coastal ecosystems, coastal processes, environment, estuary, geospatial datasets, inlandWaters, marsh health, oceans, salt marsh, vegetation, wetland ecosystems, wetland functions, Fewer tags Seabeach Amaranth Presence-Absence Data, Assateague Island National Seashore, 2010 Understanding how sea-level rise will affect coastal landforms and the species and habitats they support is critical for developing approaches that balance the needs of humans and native species. Given the magnitude of the threat posed by sea-level rise, and the urgency to better understand it, there is an increasing need to forecast sea-level rise effects on barrier islands. To address this problem, scientists in the U.S. Geological Survey (USGS) Coastal and Marine Geology program are developing Bayesian networks as a tool to evaluate and to forecast the effects of sea-level rise on shoreline change, barrier island geomorphology, and habitat availability for species such as the piping plover (Charadrius melodus)... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Assateague Island, Assateague Island, Assateague Island National Seashore, Assateague Island National Seashore, Atlantic Ocean, All tags... Barrier Island, Bayesian Network, CMHRP, Chincoteague National Wildlife Refuge, Coastal Erosion, Coastal Habitat, Coastal Hazards, Coastal and Marine Hazards and Resources Program, Coastal processes, Delmarva Peninsula, Erosion, GIS, Geographic Information Systems, MD, MHW, Maryland, Mean High Water, North America, Probability, Sea Level Rise, Sea-level change, Seabeach amaranth, Shoreline Change, U.S. Geological Survey, USA, USGS, United States, VA, Virginia, Woods Hole Coastal and Marine Science Center, coastal processes, environment, environment, erosion, geographic information systems, geomorphology, geoscientificInformation, geoscientificInformation, geospatial analysis, geospatial datasets, hazards, hazards, land use and land cover, sea-level change, transect sampling, vegetation, Fewer tags Wavy organic (Cryptozonic) bedding in Conococheague limestone. Williamsport quadrangle, Maryland. No date. Wavy organic (Cryptozonic) bedding in Conococheague limestone. Location A 1, roadside quarry just north of Clear Spring. Williamsport quadrangle. Maryland. No date. Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Maryland, Photographers, photo print 1 2 3 4 5 ... 12 »