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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 Landsat Burned Area Essential Climate Variable products for the conterminous United States (1984 - 2015) The U.S. Geological Survey (USGS) has developed and implemented an algorithm that identifies burned areas in dense time series of Landsat image stacks to produce the Landsat Burned Area Essential Climate Variable (BAECV) products. The algorithm makes use of predictors derived from individual Landsat scenes, lagged reference conditions, and change metrics between the scene and reference conditions. Outputs of the BAECV algorithm consist of pixel-level burn probabilities for each Landsat scene, and annual burn probability, burn classification, and burn date composites. These products were generated for the conterminous United States for 1984 through 2015. These data are also available for download at https://rmgsc.cr.usgs.gov/outgoing/baecv/BAECV_CONUS_v1.1_2017/... Categories: Data Release - Revised; Tags: Alabama, Arizona, Arkansas, BAECV, Burned area, All tags... California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Landsat, 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, Prescribed fire, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, USGS Science Data Catalog (SDC), United States, Utah, Vermont, Virginia, Washington, West Virginia, Wildfire, Wildland fire, Wisconsin, Wyoming, 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 The State Geologic Map Compilation (SGMC) Geodatabase of the Conterminous United States The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States (https://doi.org/10.5066/F7WH2N65) represents a seamless, spatial database of 48 State geologic maps that range from 1:50,000 to 1:1,000,000 scale. A national digital geologic map database is essential in interpreting other datasets that support numerous types of national-scale studies and assessments, such as those that provide geochemistry, remote sensing, or geophysical data. The SGMC is a compilation of the individual U.S. Geological Survey releases of the Preliminary Integrated Geologic Map Databases for the United States. The SGMC geodatabase also contains updated data for seven States and seven entirely new State geologic... Categories: Data, Data Release - Revised; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Alabama, Arizona, Arkansas, California, Colorado, All tags... Connecticut, Delaware, Florida, Georgia, 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, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, USGS Science Data Catalog (SDC), Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, age, bedrock geologic units, data services, dike, fault, fold, geographic information systems, geologic contacts, geologic map, geologic maps, geologic time periods, geology, geoscientificInformation, geospatial datasets, igneous rocks, metamorphic rocks, sedimentary rocks, structural geology, surficial geologic units, unconsolidated deposits, Fewer tags Data in Support of Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania (ver. 2.0, August 2020) Regression equations, which may be used to estimate flood flows at select annual exceedance probabilities, were developed for ungaged streams in Pennsylvania. The equations were developed using annual peak flow data through water year 2015 and basin characteristics for 285 streamflow gaging stations across Pennsylvania and surrounding states. The streamgages included active and discontinued continuous-record stations, as well as crest-stage partial-record stations, and required a minimum of 10 years of annual peak streamflow data for inclusion in the study. Explanatory variables significant at the 95-percent confidence level for one or more regression equations included the following basin characteristics: drainage... Categories: Data, Data Release - Revised; Tags: Maryland, New York, Ohio, Pennsylvania, Regression Analysis, All tags... USGS Science Data Catalog (SDC), West Virginia, Fewer tags Potential contaminant sources and other landscape variables summarized for NHDPlus Version 2.1 catchments within the Chesapeake Bay Watershed (ver. 2.0, June 2021) This dataset consists of 262 variables which describe various known and suspected point and non-point sources of contaminants and endocrine disrupting compounds (EDCs) throughout the Chesapeake Bay Watershed. Contaminant data was summarized to the NHDPlus Version 2.1 catchment level (1:100K). Contaminant data summarized span a time range of 2001 to 2016 and include regulated facilities, pesticides, manure and biosolids application data, mercury deposition, animal feeding applications, septic systems, landfills, and land use and land cover. These data are presented in a comma separated file, which includes all variables summarized and the NHDPlus Version 2.1 FEATUREID field (also known as COMID). The FEATUREID field... Categories: Data, Data Release - Revised; Types: Citation; Tags: Aquatic Biology, Chesapeake Bay, Chesapeake Bay Basin, Delaware, Discharge Monitoring Report (DMR), All tags... District of Columbia, Environmental Health, Facility Registry Service (FRS), Geography, Land Use Change, Maryland, New York, Pennsylvania, Remote Sensing, Toxic Release Inventory (TRI), USGS Science Data Catalog (SDC), Virginia, Water Quality, Water Resources, West Virginia, Wildlife Biology, Wildlife Disease, biosolids application, concentrated animal feeding operations (CAFOs), contamination and pollution, geographic information systems, geography, health and disease, human impacts, industrial pollution, land use and land cover, landfills, manure nitrogen and phosphorus, mercury deposition, natural resources, nonpoint-source pollution, pesticide and herbicide contamination, pharmaceutical contamination, phytoestrogens, septic facilities, water quality, water resources, Fewer tags Geochemical data generated by projects funded by the USGS Earth Mapping Resources Initiative (ver. 9.0, February 2024) The geochemical data included here were generated as part of the Earth Mapping Resources Initiative (Earth MRI), which was developed by the U.S. Geological Survey (USGS) in response to a Federal directive calling on various Federal agencies to address potential vulnerabilities in the Nation’s supply of critical mineral resources. Earth MRI is a partnership between the USGS, State Geological Surveys, and industry coordinating with other federal agencies to accomplish the mission. The primary purpose of this initiative is to identify potentially mineralized areas containing critical minerals by gathering new basic geologic data about the United States and its territories and to make these data publicly available through... Categories: Data, Data Release - Revised; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Alabama, Alaska, Alaska Division of Geological & Geophysical Surveys, Arizona, Arizona Geological Survey, All tags... Arkansas, Arkansas Geological Survey, California, California Geological Survey, Colorado, Colorado Geological Survey, Florida, Florida Geological Survey, GGGSC, Geological Survey of Alabama, Geology, Geophysics, and Geochemistry Science Center, Georgia, Idaho, Idaho Geological Survey, Illinois, Illinois State Geological Survey, Indiana, Indiana Geological and Water Survey, Iowa, Kentucky, Kentucky Geological Survey, MRP, Maine, Maine Geological Survey, Maryland, Maryland Geological Survey, Michigan, Michigan Geological Survey, Mineral Resources Program, Missouri, Missouri Geological Survey, Montana, Montana Bureau of Mines & Geology, Nevada, Nevada Bureau of Mines and Geology, New Mexico, New Mexico Bureau of Geology & Mineral Resources, New York, North Carolina, North Carolina Geological Survey, Ohio, Oklahoma, Pennsylvania, Pennsylvania Department of Conservation & Natural Resources, South Carolina, South Carolina Department of Natural Resources, Tennessee, Texas, Texas Bureau of Economic Geology, USGS Science Data Catalog (SDC), United States, Utah, Utah Geological Survey, Virginia, Virginia Division of Geology and Mineral Resources, Washington, Washington Geological Survey, West Virginia, West Virginia Geological and Economic Survey, Wisconsin, Wisconsin Geological and Natural History Survey, Wyoming, Wyoming State Geological Survey, chemical analysis, economy, exploration geochemistry, geochemical data, geochemistry, geoscientificInformation, igneous rocks, metamorphic rocks, natural resource exploration, rock chemistry, sediment chemistry, sedimentary rocks, soil chemistry, unconsolidated deposits, Fewer tags Estimated Annual Agricultural Pesticide Use by Major Crop or Crop Group for States of the Conterminous United States, 1992-2017 (ver. 2.0, May 2020) This data release provides state-level estimates of annual agricultural use of pesticide compounds by major crop or crop group for states in the conterminous United States, for the time period 1992-2017, compiled from data used to make county-level estimates by means of methods described in Thelin and Stone (2013) and Baker and Stone (2015). The source of these data is the same as the published county-level pesticide use estimates for 1992-2009 (Stone, 2013), estimates for 2008-2012 (Baker and Stone, 2015), and estimates for 2013-17 (Wieben, 2019). County-level by-crop estimates are not published because of the increased uncertainty in estimating the geographic distribution of compounds applied to specific crops.... Categories: Data Release - Revised; Tags: Alabama, Arizona, Arkansas, California, Colorado, All tags... Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, NAWQA, National Water Quality Program, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, USGS Science Data Catalog (SDC), United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, agriculture, crops, environment, geoscientificInformation, inlandWaters, pesticide use, water quality, Fewer tags GIS for focus areas of potential domestic resources of 11 critical minerals—aluminum, cobalt, graphite, lithium, niobium, platinum group elements, rare earth elements, tantalum, tin, titanium, and tungsten (version 2.0, August 2020) In response to Executive Order 13817 of December 20, 2017, the U.S. Geological Survey (USGS) coordinated with the Bureau of Land Management (BLM) to identify 35 nonfuel minerals or mineral materials considered critical to the economic and national security of the United States (U.S.) (https://pubs.usgs.gov/of/2018/1021/ofr20181021.pdf). Acquiring information on possible domestic sources of these critical minerals is the rationale for the USGS Earth Mapping Resources Initiative (Earth MRI). The program, which partners the USGS with State Geological Surveys, federal agencies, and the private sector, aims to collect new geological, geophysical, and topographic (lidar) data in key areas of the U.S. to stimulate mineral... Categories: Data, Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags... Colorado, Connecticut, Delaware, District of Columbia, Earth Mapping Resources Initiative (Earth MRI), Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Mineral Resources, Mineral Resources Program (MRP), 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, West Virginia, Wisconsin, Wyoming, aluminum, cobalt, critical mineral, economic geology, geospatial datasets, graphite, heavy rare earth elements, iron-oxide apatite, iron-oxide copper gold, light rare earth elements, lithium, mineral deposits, niobium, phosphate, platinum group elements, rare earth elements, tantalum, tin, titanium, tungsten, Fewer tags Data for Distribution of Groundwater Age in Aquifers Used for Public Supply in the Continental United States, 2004 - 2017 (Version 1.1: June 2022) This data release documents seven tables that contain environmental tracer data and lumped parameter model (LPM) results that are used for assessing the distribution of groundwater age in 21 Principal Aquifers of the continental United States. Groundwater samples were collected from 1,279 sites and analyzed for environmental tracers: tritium, tritiogenic helium-3, sulfur hexafluoride, carbon-14, and radiogenic helium-4. For each sample, groundwater age distributions were estimated by fitting LPMs to the environmental tracers using the computer program TracerLPM (Jurgens and others, 2012). Calibrated lumped parameter models provide the optimal distribution of ages in a sample that explain the measured concentrations... Categories: Data Release - Revised; Tags: Alabama, Arizona, Arkansas, Basin and Range basin-fill aquifers (BNRF), Basin and Range carbonate-rock aquifers (BNRC), All tags... Biscayne aquifer (BISC), California, California Coastal Basin aquifers (CACB), Cambrian-Ordovician aquifer system (CMOR), Central Valley aquifer system (CVAL), Coastal lowlands aquifer system (CLOW), Colorado, Colorado Plateaus aquifers (COPL), Columbia Plateau basaltic-rock aquifers (CLPT), Connecticut, Cycle 3, Delaware, Dissolved gas, Edwards carbonate aquifer system (EDCB), Edwards-Trinity aquifer system (EDTR), Environmental tracers, Florida, Floridan aquifer system (FLOR), Georgia, Glacial aquifer system (GLAC), Groundwater age, High Plains aquifer (HPAQ), Hydrology, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Lumped parameter modeling, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Mississippi embayment-Texas coastal uplands aquifer system (METX), Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Northern Atlantic Coastal Plain aquifer system (NACP), Ohio, Oklahoma, Oregon, Ozark Plateaus aquifer system (OZRK), Pennsylvania, Piedmont and Blue Ridge crystalline-rock aquifers (PDBR), Radiocarbon, Recharge temperature, Rio Grande aquifer system (RIOG), South Carolina, South Dakota, Southeastern Coastal Plain aquifer system (SECP), Tennessee, Texas, USGS National Water Quality Assessment Project, USGS Science Data Catalog (SDC), Utah, Valley and Ridge and Piedmont and Blue Ridge carbonate-rock aquifers (VRPD), Vermont, Virginia, Washington, Water Resources, West Virginia, Wisconsin, Wyoming, environment, inlandWaters, Fewer tags Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2020 (ver. 2.0, January 2023) 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 stations for the period 1985 through 2020. 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 and were estimated using the WRTDS method with Kalman filtering. To determine the trend in loads, the annual load results are flow... Categories: Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Chesapeake Bay Watershed, Delaware, Kalman filtering, Maryland, New York, All tags... Pennsylvania, USGS Science Data Catalog (SDC), United States, Virginia, WRTDS, WRTDS-K, Washington DC, West Virginia, load analysis, nitrogen, nutrients, phosphorus, rivers, suspended sediment, trends, water quality, weighted regression, Fewer tags Enhanced Terrain Imagery of the Hagerstown 30 x 60 Minute Quadrangle from Lidar-Derived Elevation Models at 3-Meter Resolution (ver. 1.1, February 2024) This imagery dataset consists of 3-meter resolution, lidar-derived imagery of the Hagerstown 30 x 60 minute quadrangle in Pennsylvania, Maryland, and part of West Virginia. The source data used to construct this imagery consists of 1-meter resolution lidar-derived digital elevation models (DEMs). The lidar source data were compiled from different acquisitions published between 2016 and 2023. The data were processed using geographic information systems (GIS) software. The data is projected in WGS 1984 Web Mercator. This representation illustrates the terrain as a hillshade with contrast adjusted to highlight local relief according to a topographic position index (TPI) calculation. First release: 2012 Revised: February... Categories: Data, Data Release - Revised; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Raster; Tags: Lidar, Maryland, Pennsylvania, USGS Science Data Catalog (SDC), West Virginia, All tags... elevation, imageryBaseMapsEarthCover, lidar, topography, Fewer tags