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Nitrogen flux estimates in support of Chesapeake Bay Hypoxia and Anoxia forecasts, 1985-2020 Note: This data release has been superseded by https://doi.org/10.5066/P9N4MPIH Data release includes the U.S. Geological Survey (USGS) estimate of spring nitrogen fluxes from nine tributaries to the Chesapeake Bay from 1985 to 2020. Data are presented from tributaries within the USGS River Input Monitoring (RIM) network identified by site numbers: 01491000, 01578310, 01594440, 01646580, 01668000, 01673000, 01674500, 02035000, 02041650. Periods of estimation include January through May and November through May. The estimates are made using up-to-date streamflow and all total nitrogen analyses available as of June 1 of the reporting year. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Environmental Health, USGS Science Data Catalog (SDC), Water Quality, Water Resources 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 Animal Best Management Practice by Chesapeake Bay Watershed Region from 1985 to 2014 This metadata record covers 18 comma delimited files that support the USGS Scientific Investigations Report 2018-5022 Manure and Fertilizer Inputs to Land in the Chesapeake Bay Watershed, 1950-2014 by Jennifer Keisman, Olivia Devereux, Andrew LaMotte, Andrew Sekellick, and Joel Blomquist. The data were created by running scenarios through the Chesapeake Bay Program Partnership Phase 5.3.2 Watershed Model for years between 1985 and 2014. Scenarios include data with the reported Best Management Practice (BMP) for each year, as well as scenarios with no BMPs for each year. Data include summaries of the amount of land use change and animal BMPs reported as implemented for each year. Data originated with the Chesapeake... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: BMP, Best Management Practice, Chesapeake Bay, Geography, Land Use Change, All tags... USGS Science Data Catalog (SDC), Water Quality, Water Resources, Fewer tags Gridded South Carolina StreamStats Runoff Curve Numbers by NLCD Landcover and SSURGO Soils Class This dataset was produced by the US Geological Survey as a supporting dataset to be used for the purpose of calculating stream gage basin characteristics in preparation for the South Carolina StreamStats application. This integer raster dataset represents runoff curve numbers for the combinations of hydrological soils groupings and land cover types within the South Carolina StreamStats study area. Soils data are from the USDA, NRCS SSURGO soils database and land cover data are USGS 2019 NLCD data. The dataset will be used in peak flow regression equations that are used to predict flow in South Carolina streams. The StreamStats application provides access to spatial analytical tools that are useful for water-resources... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Georgia, Land cover, NLCD 2019, National Land Cover Dataset, North Carolina, All tags... SSURGO Database, South Carolina, StreamStats, TR-55, USGS Science Data Catalog (SDC), Water Resources, biota, hydric soils, runoff curve number, soils, Fewer tags Digital elevation model and derivative datasets to support the integration of stormwater drainage into the Washington, D.C. Stormwater StreamStats application This dataset was created to support the Washington D.C. StreamStats project funded by the Washington D.C. Department of Energy and Environment (DOEE). The dataset contains digital elevation model (DEM), flow direction and catchment layers that were conditioned using Washingtons D.C.’s stormwater network layer. The data are hosted online as a component of the USGS StreamStats web application (https://streamstats.usgs.gov), where users can interact with a map of Washington D.C.’s stormwater pipe system and National Hydrography Dataset (NHD) “best resolution” blue lines to delineate drainage basins that account for pipe flow. This project utilized 1-meter (high resolution) terrain products, which improves upon existing... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Anacostia, District of Columbia, Fourmile Run - Potomac River, Geography, Hydrology, All tags... Lower Anacostia River, Lower Rock Creek, Mid Atlantic, Middle Potomac-Anacostia-Occoquan, Montgomery, Nichols Run Potomac River, Northwest Branch Anacostia, Pimmit Run - Potomac River, Potomac, Prince George's, Remote Sensing, USGS Science Data Catalog (SDC), Washington East, Washington West, Water Resources, digital elevation models, drainage basins, earth characteristics, elevation, environment, geoscientificInformation, geospatial datasets, hydrographic features, land surface characteristics, lidar, streams, topography, Fewer tags Poultry Feeding Operations on the Delaware, Maryland, and Virginia Peninsula from 2016 to 2017 Data release contains two shapefiles related to poultry houses on the Delmarva Peninsula (Delaware, Eastern Shore Maryland and, Eastern Shore Virginia). One dataset is a polygon shapefile representing 6013 poultry houses identified using 2016 and 2017 aerial imagery from the U.S. Department of Agriculture's National Aerial Imagery Program (NAIP). The second dataset is a point shapefile of inactive houses which displayed similar characteristics to the active houses except were overgrown or in a state of disrepair (in some cases only the building's footprint remains). Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CAFO, Chesapeake Bay, Chicken, Delaware, Delmarva, All tags... Eastern shore Maryland, Eastern shore Virginia, Geography, Land Use Change, Maryland, Poultry, Poultry Houses, USGS Science Data Catalog (SDC), Virginia, Water Resources, Wildlife Disease, farming, inlandWaters, Fewer tags Passive seismic data collected along headwater stream corridors in Shenandoah National Park in 2016 - 2020 In July 2016, July 2019, and March 2020, 318 seismic recordings were acquired at locations within Shenandoah National Park, Virginia, using MOHO Tromino Model TEP-3C three-component seismometers to assess depth to bedrock using the HVSR method. This method requires a measurement of estimate of shear wave velocity, which depends on the regolith sediment composition and density, for the conversion of measured resonance frequency to a depth to bedrock. Shear wave velocities were calculated for sediment in Shenandoah NP at locations where regolith thickness is known (e.g. at documented boreholes). The locations in this study were generally selected to characterize the depths to bedrock adjacent to streams monitored... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: HVSR, Headwater Streams, Hydrogeology, Regolith Thickness, Shenandoah National Park, All tags... USGS Science Data Catalog (SDC), Fewer tags Data for Specific Gage Analyses on the Patapsco River, 2010-2017 The U.S. Geological Survey, in collaboration with American Rivers and other partners, conducted a monitoring program beginning in 2010 to track river response to a series of dam removals on the Patapsco River intended to restore anadromous fish habitat in the watershed. Dam removals included the November 2010 removal of the Simkins dam, a 3.3 m tall and 66 m wide dam, with a reservoir sediment volume of ~67,000 cubic meters. As part of the dam removal monitoring program, three USGS streamgaging stations were established in late 2010 along the mainstem of the Patapsco River to estimate flow and suspended sediment-transport for constraining sediment budgets. USGS 01589000 Patapsco River at Hollofield, MD was reestablished... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Geomorphology, Hydrology, Patapsco River, Simkins Dam, USGS Science Data Catalog (SDC), All tags... biota, channel evolution, dam removal, deposition, dispersion, geomorphology, sediment, sediment pulse, sediment transport, sedimentation, specific stage, stream-gage measurement, streamflow, suspended material (water), translation, Fewer tags Implementation of conservation tillage and cover crops in the Chesapeake Bay watershed, 1985 to 2012 Conservation tillage practices and cover crops are used throughout the Chesapeake Bay watershed to reduce soil loss and improve water quality. Implementation of these Best Management Practices (BMPs) were reported to the Chesapeake Bay Program (CBP) by each state in the watershed (New York, Pennsylvania, Maryland, Delaware, West Virginia, and Virginia). Estimates of acres of implementation per CBP land river modeling segment for the years 1985 through 2014 were provided to the U.S. Geological Survey. These data were distributed to agricultural land use cells in the National Land Cover Dataset (NLCD) dataset and summed for National Hydrography Dataset (NHD) Plus version 1 catchments to provide estimates of implementation... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Environmental Health, Geography, USGS Science Data Catalog (SDC), Water Quality Basin characteristics data for the Washington, D.C. StreamStats application This data was created to support the Washington D.C. StreamStats project funded by the Washington D.C. Department of Energy and Environment (DOEE). The data release contains high-resolution (1-meter) land cover data layers for Washington D.C. and its tributaries that represent canopy cover, canopy cover with building and road coverage removed (“pervious canopy”), impervious cover, slope (in units of percent rise), and 30-year normal annual precipitation (1991-2020). The data are hosted online as a component of the USGS StreamStats web application (https://streamstats.usgs.gov), where users can interact with a map of Washington D.C.’s stormwater pipe system and delineate drainage basins that account for pipe flow.... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Anacostia, District of Columbia, Fourmile Run - Potomac River, Geography, Lower Anacostia River, All tags... Lower Rock Creek, Mid Atlantic, Middle Potomac-Anacostia-Occoquan, Montgomery, Nichols Run Potomac River, Northwest Branch Anacostia, Paint Branch, Pimmit Run - Potomac River, Potomac, Prince George's, Remote Sensing, USGS Science Data Catalog (SDC), Upper Rock Creek, Washington East, Washington West, Water Resources, environment, geoscientificInformation, geospatial datasets, land surface characteristics, land use and land cover, land use maps, Fewer tags Data in support of the occurrence and distribution of per- and polyfluoroalkyl substances in sampled source water of public drinking-water supplies in the surficial aquifer in Delaware, 2018 Thirty water-supply drinking-water wells were sampled during fall 2018 for a set of constituents including PFAS. Groundwater samples were sent to Maxxam Laboratories (RTI Laboratory contract) to be analyzed for eighteen PFAS using USEPA 537m method. Groundwater age data were collected and analyzed as well in the USGS Reston, Va. laboratory. Quality-control samples including equipment and field blanks, sequential replicate samples, and laboratory spikes, were collected to evaluate and estimate potential contamination bias and measure variability from water-quality data-collection processes. No PFAS were detected in equipment or field blanks indicating that selected equipment, cleaning, sampling, and handling procedures... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Coastal Plain, Delaware, Emergent contaminants, Groundwater age, Groundwater quality, All tags... Hydrology, Kent County, New Castle County, PFAS, Surficial Aquifer, Sussex County, USGS Science Data Catalog (SDC), Water Quality, Water sampling, inlandWaters, per- and polyfluoroalkyl substances, Fewer tags Visible and near-infrared spectroscopy for sediment samples collected across North-eastern U.S. This data record contains a CSV file with spectral reflectance (420-2114 nm) for sediment samples collected from each of four source locations (cropland, stream bank, glaciolacustrine, and street dust) located across sites in the Northwestern US during prior studies. Data were collected in a laboratory setting using Spectrecology USB4000-VIS-NIR and NIRQuest512-2.2 spectrometers. The data contain spectra collected from sieved, non-sieved, dry and suspended samples from each sample source, as well as spectra for calibration standards. Explanation of fields in contained in the spectral properties data table are described in a data dictionary. Data on the physical properties of samples used in this study have been... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Baltimore, Geomorphology, Harrisonburg, Lower Chesapeake Bay, Maryland, All tags... Mineral Resources, New York, Sedimentology, Soil Sciences, USGS Science Data Catalog (SDC), Upper Chesapeake Bay, Virginia, Water Quality, geoscientificInformation, inlandWaters, sediment analysis, Fewer tags CAST Data Input Disaggregation from County and Land-River Segment Scale to National Hydrography Dataset Plus, Version 1.1 The detrimental effects of excess nutrients and sediment entering the Chesapeake Bay estuary from its watersheds have necessitated regulatory actions. Federally-mandated reductions are apportioned to bay jurisdictions based on the U.S. Environmental Protection Agency's Chesapeake Bay Time-Variable Watershed Model (CBPM). The Chesapeake Assessment Scenario Tool (CAST version CAST-19; cast.chesapeakebay.net; Chesapeake Bay Program, 2020) is a simplified, on-line version of the Phase 6 CBPM that simulates watershed nutrients delivery to the estuary using the original model's annual land-surface nutrient source and removal inputs and time-averaged climatological forecasting. Because it runs much faster than the CBPM,... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Atmospheric Deposition, Biosolids, Chesapeake, Chesapeake Assessment and Scenario Tool (CAST), Chesapeake Bay, All tags... Combined Sewer Overflow, DC, DE, Fertilizer, Land Use Change, MD, Manure, NY, National Hydrography Dataset (NHD), Nitrogen Fixation and Crop Nutrient Uptake, Nutrient Inputs, PA, USGS Science Data Catalog (SDC), VA, WV, Wastewater, Septic Systems, and Rapid Infiltration Basins, Water Quality, environment, nutrient cycling, Fewer tags Time Series of Aerial Photogrammetry Data and Products of the Delaware Atlantic Coast This data release presents a time series of aerial imagery and derived structure-from-motion (SfM) products collected along the Delaware Atlantic coast with a piloted fixed-wing aircraft. U.S. Geological Survey (USGS) researchers use the aerial imagery and products to assess topographic and landscape change, evaluate nesting habitats for wildlife, and for understanding coastal vulnerability and response to disturbance events. Products include three-dimensional (3D) point clouds and digital elevation models, and orthomosaic images (RGB-averaged products) created from aerial imagery surveys with precise Global Navigation Satellite System (GNSS) data. The products span the coast over both highly developed towns and... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Coastal, Delaware, Digital Elevation Models (DEMs), East Coast, Geography, All tags... Geomorphology, Orthoimagery, Remote Sensing, Structure from Motion, USGS Science Data Catalog (SDC), Fewer tags 30 Year (1990 - 2019) Annual Average Difference between Precipitation Potential Evapotranspiration This metadata record describes the 30 year (1990-2019) annual average difference between precipitation potential evapotranspiration in millimeters in geotiff format. The source data is based on the ClimGrid netcdf data for precipitation and temperature (Wieczorek and others, 2022). Units are millimeters. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Climatology, Conterminous United States, Geography, Hydrology, USGS Science Data Catalog (SDC), All tags... climate, climgrid, mean annual precipitation, potential evapotranspiration, precipitation, tif, Fewer tags Ephemeral channel heads and digital elevation models used to extract stream networks in Clarksburg, MD (ver. 2.0, October 2021) This dataset describes the location of channel heads survyed in two headwater watersheds in Clarksburg, Montgomery County, Maryland, and the digital elevation models derived from light detection and ranging (lidar) covering the two watersheds. The digital elevation models were used to derive topographic attributes used to delineate drainage networks that were then assessed for accuracy using the field-surveyed channel heads. First posted - January 21, 2021 (available from author) Revised - October 15, 2021 (version 2.0) Categories: Data, Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Maryland, USGS Science Data Catalog (SDC), drainage basins, land surveying, river systems, All tags... streams, Fewer tags Water bodies within 500 meters of poultry feeding operations on the Delmarva Peninsula in 2016 and 2017 Data release contains 1710 polygons representing small bodies of water within 500 meters of poultry feeding operations on the Delmarva Peninsula. Ponds were identified using the USDA's National Agriculture Imagery Program's 2016 and 2017 products. Poultry feeding operations were described in location by Soroka and Duren (2020). Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Avian Influenza, Chesapeake Bay, Chicken, Delaware, Delmarva, All tags... Eastern shore Maryland, Eastern shore Virginia, Ecology, Environmental Health, Hydrology, Land Use Change, Maryland, Ponds, Poultry, Poultry Houses, USGS Science Data Catalog (SDC), Virginia, Water Resources, Waterfowl, Wildlife Biology, Wildlife Disease, Wildlife Disease, farming, inlandWaters, Fewer tags Questions and responses to USGS-wide poll on quality assurance practices for timeseries data, 2021 This data record contains questions and responses to a USGS-wide survey conducted to identify issues and needs associated with quality assurance and quality control (QA/QC) of USGS timeseries data streams. This research was funded by the USGS Community for Data Integration as part of a project titled “From reactive- to condition-based maintenance: Artificial intelligence for anomaly predictions and operational decision-making”. The poll targeted monitoring network managers and technicians and asked questions about operational data streams and timeseries data collection in order to identity opportunities to streamline data access, expedite the response to data quality issues, improve QA/QC procedures, reduce operations... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquatic Biology, Hydrology, Information Sciences, Puerto Rico, USGS, All tags... USGS Science Data Catalog (SDC), United States, Water Quality, Water Resources, anomaly detection, biota, continuous monitoring, data review, environment, geoscientificInformation, inlandWaters, poll, quality assurance, quality control, survey, time series data, utilitiesCommunication, Fewer tags SPARROW model input datasets and predictions for predicting near-term effects of climate change on nitrogen transport to Chesapeake Bay This data release includes 5 files containing model inputs and resulting model predictions. A previously-calibrated spatially referenced regression (SPARROW) model was used to estimate effects of climate change on in-stream nitrogen (TN) loads in the Chesapeake Bay watershed between 1995 and 2025. Model scenarios were run using data for nitrogen sources and landscape characteristics from 2012, changing only temperature and runoff using climate change predictions to evaluate the change in climate on TN loads. Confidence intervals for model output predictions are also included. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Chesapeake Bay, Hydrology, USGS Science Data Catalog (SDC), Water Quality, Water Resources, All tags... atmospheric and climatic processes, biota, climate change, effects of climate change, hydrology, nitrogen, water quality, Fewer tags Discrete and high-frequency chloride (Cl) and specific conductance (SC) data sets and Cl-SC regression equations used for analysis of 93 USGS water quality monitoring stations in the eastern United States High frequency estimated chloride (Cl) and observed specific conductance (SC) data sets, along with response variables derived from those data sets, were used in an analysis to quantify the extent to which deicer applications in winter affect water quality in 93 U.S. Geological Survey water quality monitoring stations across the eastern United States. The analysis was documented in the following publication: Moore, J., Fanelli, R.M., and Sekellick, A.J., in review, high frequency data reveal deicing salts drive elevated conductivity and chloride along with pervasive and frequent exceedances of the EPA aquatic life criteria for chloride in urban streams. Submitted to Environmental Science and Technology. This data... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Chloride, Deicers, Environmental Health, Hydrology, Land Use Change, All tags... Road salt, Specific conductance, USGS Science Data Catalog (SDC), United States, Urbanization, Water Quality, Water Resources, Water quality, Wildlife Biology, environment, Fewer tags 1 2 »