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Filters Date Range Past year (2) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Citation (1) Contacts Matthew P Miller Water Resources Douglas A Burns Sydney S Foks Integrated Modeling & Prediction Division More... Categories Data (4) Tag Types Place (8) Theme (8) USGS Scientific Topic Keyword (7) Harvest Set (8) Tag Schemes Geopolitical Entities, Names, and Codes (GENC) (1) None (8) USGS Thesaurus (8) Common geographic areas (7) ISO 19115 Topic Category (2) Marine Realms Information Bank (MRIB) keywords (4) View Results as: JSON ATOM CSV

Estimates of atmospheric inorganic nitrogen deposition to the Chesapeake Bay watershed, 1950-2050 Reactive nitrogen is transported from the atmosphere to the landscape as wet and dry deposition that contributes to annual nitrogen loads to the Chesapeake Bay. Estimates of atmospheric inorganic nitrogen deposition to the Chesapeake Bay watershed during 1950 to 2050 are presented, and are based on field measurements, model simulations, statistical relations, and surrogate constituents used for estimates. Wet atmospheric nitrogen deposition has generally been quantified from weekly precipitation sample collections, whereas dry atmospheric nitrogen deposition has been simulated by a model at an hourly time step. Tags: Chesapeake, Chesapeake Bay watershed, Delaware, District of Columbia, Environmental Health, All tags... Geochemistry, Hydrology, Land Use Change, Lower Chesapeake Bay, Maryland, New York, Pennsylvania, USGS Science Data Catalog (SDC), Upper Chesapeake Bay, Virginia, Water Quality, West Virginia, ammonia, ammonium, atmospheric and climatic processes, atmospheric deposition (chemical & particulate), atmospheric properties, direct atmospheric deposition, estuary, inorganic, nitrate, nitric acid, nitric oxide, nitrogen, oxides, precipitation (atmospheric), reduced, water quality, watershed, watershed management, Fewer tags Monthly estimates of natural baseflow for 15,866 stream reaches, defined by the National Hydrography Dataset Plus Version 2.0 (NHDPlusV2), in the Delaware River Basin for the period 1950-2015 This metadata record describes monthly estimates of natural baseflow for 15,866 stream reaches, defined by the National Hydrography Dataset Plus Version 2.0 (NHDPlusV2), in the Delaware River Basin for the period 1950-2015. A statistical machine learning technique - random forest modeling (Liaw and Wiener, 2018; R Core Team, 2020) - was applied to estimate natural flows using about 150 potential predictor variables (Miller and others, 2018). Calibration data used for the random forest model are available from (Foks and others, 2020). Each model was run twice, first using all potential predictor variables, which represents a "full" model run, and a second time using the top 20 predictors from the original run, which... Categories: Data; Tags: Delaware, Delaware River Basin, Hydrology, National Hydrography Dataset Plus Version 2.0, New Jersey, All tags... New York, Pennsylvania, USGS Science Data Catalog (SDC), anthropogenic modification, baseflow, environmental impacts, geochemistry, geoscientificInformation, groundwater, hydrology, inlandWaters, natural flows, random forest modeling, random forests, river reaches, rivers/streams, streamflow, surface water hydrology, water resources, Fewer tags Data and equations used to reconstruct historical daily streamflows in northern New Jersey and southeastern New York, water years 1922-2010 This U.S. Geological Survey (USGS) data release provides daily reconstructed streamflows at 53 sites in selected subbasins in northern New Jersey and southeastern New York for water years 1922-2010; data and equations used to determine the reconstructed flows are included. These subbasins contain one or more surface-water diversions that are currently operated or have been operated in the past by water purveyors or the New Jersey Department of Environmental Protection (NJDEP). The streams include the Passaic and Hackensack Rivers and some adjacent streams. Reconstructed streamflows are estimates of those streamflows that would have occurred without the effects of changes in reservoir storage or surface-water diversions... Types: Citation; Tags: Hackensack River Basin, New Jersey, New York, Passaic River Basin, Reconstructed flows, All tags... USGS Science Data Catalog (SDC), northern New Jersey, reservoir storage, southeastern New York, streamflow, surface water, surface-water diversion, water-supply planning, Fewer tags Datasets and scripts used for estimating streamflow and base flow within the nontidal Chesapeake Bay riverine system, water years 2006-15 This U.S. Geological Survey (USGS) data release contains estimated daily streamflow and base flow for HUC12 in the nontidal areas of the Chesapeake Bay watershed, monthly average streamflow and base flow, flow statistics, MATLAB scripts, and a document that describes how to create similar datasets in other watersheds. Daily streamflow was estimated for all the nontidal parts of the Chesapeake Bay watershed with the program "Unit Flows in Networks of Channels" (UFINCH; Holtschlag, 2016), together with the observations of measured streamflow at gages at the downstream ends of major rivers. The estimated streamflow was aggregated at the HUC12 level and reformatted as an Optimal Hydrograph Separation (OHS) input file... Categories: Data; Tags: Chesapeake Bay watershed, Delaware, Maryland, Pennsylvania, USGS Science Data Catalog (SDC), All tags... Virginia, Washington, DC, Water Quality, West Virginia, base flow, baseflow, datasets, geospatial datasets, groundwater, hydrograph separation, stream-gage measurement, streamflow, surface water (non-marine), Fewer tags Daily-timestep and monthly-timestep estimates of baseflow at 49 reference stream gages located within 25 miles of the Delaware River basin watershed boundary for the years 1950 through 2015 This USGS data release contains daily-timestep and monthly-timestep estimates of baseflow at 49 reference stream gages located within 25 miles of the Delaware River basin watershed boundary. Estimates are provided for the available period of record of streamflow data at each site between 1950 and 2015. A two-parameter recursive digital filter was used to estimate baseflow at the selected stream gaging stations using U.S. Geological Survey Groundwater Toolbox (Barlow and others, 2017; Eckhardt, 2005). References cited: Barlow, P.M., Cunningham, W.L., Zhai, T., and Gray, M., 2017, U.S. Geological Survey Groundwater Toolbox version 1.3.1, a graphical and mapping interface for analysis of hydrologic data: U.S. Geological... Tags: Delaware, Delaware River basin, Hydrology, New Jersey, New York, All tags... Pennsylvania, USGS Science Data Catalog (SDC), Water Quality, Water Resources, baseflow, estuary, hydrology, river reaches, streamflow, water resources, watershed, Fewer tags Nitrogen sources to and export from the Chesapeake Bay watershed, 1950 to 2050 This U.S. Geological Survey data release contains datasets that combine past data with future projections of nitrogen sources and nitrogen export to the Chesapeake Bay watershed for the years 1950-2050. To help understand the effect of human and environmental changes over this time period, data for nitrogen sources from wastewater, agricultural fertilizer and manure, and atmospheric deposition are combined with datasets of population and land use. These datasets were used in conjunction with a previously calibrated SPAtially Referenced Regression On Watershed attributes (SPARROW) modeling tool to estimate the mean annual loads of total nitrogen to the Chesapeake Bay and nontidal stream reaches in the watershed at... Tags: Chesapeake, Chesapeake Bay watershed, Delaware, District of Columbia, Environmental Health, All tags... Geochemistry, Hydrology, Land Use Change, Lower Chesapeake Bay, Maryland, New York, Pennsylvania, TMDL, USGS Science Data Catalog (SDC), Upper Chesapeake Bay, Virginia, Water Quality, West Virginia, agriculture, baseflow, climate change, effects of climate change, estuary, eutrophication, evaporation, fertilizer, groundwater, groundwater and surface-water interaction, groundwater quality, land cover change, land use change, manure, mathematical modeling, nitrate, nitrogen, point sources, runoff, stormwater, streamflow, surface water, surface water (non-marine), surface water quality, transpiration, urban areas, wastewater discharge, water quality, watershed, watershed management, Fewer tags Yale stocks and flows database (YSTAFDB) describing anthropogenic materials cycles, recycling, and criticality for 102 materials on spatial scales ranging from suburbs to global and timescales from the early 1800s to circa 2013 This data release presents the Yale stocks and flows database (YSTAFDB). Its data describe the use of 102 materials from the early 1800s to circa 2013 through anthropogenic cycles, their recycling and criticality properties, and on spatial scales ranging from suburbs to global. This data collection was previously scattered across multiple non-uniformly formatted files such as journal papers, reports, and unpublished spreadsheets. These data have been synthesized into YSTAFDB, which is presented as individual comma-separated text files and also in MySQL and PostgreSQL database formats. Consolidation of these data into a single database can increase their accessibility and reusability, which is relevant to diverse... Categories: Data; Tags: AFGHANISTAN, ALBANIA, ALGERIA, ANDORRA, ANGOLA, All tags... ANGUILLA, ANTIGUA AND BARBUDA, ARGENTINA, ARMENIA, ARUBA, AUSTRALIA, AUSTRIA, AZERBAIJAN, Africa, Asia, BAHAMAS, THE, BAHRAIN, BANGLADESH, BARBADOS, BELARUS, BELGIUM, BELIZE, BENIN, BHUTAN, BOLIVIA, BOSNIA AND HERZEGOVINA, BOTSWANA, BRAZIL, BRUNEI, BULGARIA, BURKINA FASO, BURMA, BURUNDI, CAMBODIA, CAMEROON, CANADA, CENTRAL AFRICAN REPUBLIC, CHAD, CHILE, CHINA, COLOMBIA, COMOROS, COSTA RICA, CROATIA, CUBA, CURACAO, CYPRUS, CZECH REPUBLIC, Cape Verde, Caribbean, Central America, Central Europe, Commonwealth of Independent States, Congo (Democratic Republic of the), Congo (Republic of the), DENMARK, DJIBOUTI, DOMINICA, DOMINICAN REPUBLIC, ECUADOR, EGYPT, EL SALVADOR, EQUATORIAL GUINEA, ERITREA, ESTONIA, ETHIOPIA, East Asia, Eastern Europe, Energy Resources, Environmental Health, Europe, European Union, FIJI, FINLAND, FRANCE, FRENCH GUIANA, FRENCH POLYNESIA, GABON, GAMBIA, THE, GEORGIA, GERMANY, GHANA, GIBRALTAR, GREECE, GREENLAND, GRENADA, GUADELOUPE, GUAM, GUATEMALA, GUINEA, GUINEA-BISSAU, GUYANA, HAITI, HONDURAS, HONG KONG, HUNGARY, ICELAND, INDIA, INDONESIA, IRAN, IRAQ, IRELAND, ISRAEL, ITALY, IVORY COAST (COTE D’IVOIRE), JAMAICA, JAPAN, JORDAN, KAZAKHSTAN, KENYA, KOREA, NORTH, KOREA, SOUTH, KUWAIT, KYRGYZSTAN, LAOS, LATVIA, LEBANON, LESOTHO, LIBERIA, LIBYA, LITHUANIA, LUXEMBOURG, Latin America, MACEDONIA, MADAGASCAR, MALAWI, MALAYSIA, MALI, MARTINIQUE, MAURITANIA, MAURITIUS, MEXICO, MOLDOVA, MONGOLIA, MONTENEGRO, MOROCCO, MOZAMBIQUE, Middle East, Mineralogy, NAMIBIA, NEPAL, NETHERLANDS, NEW CALEDONIA, NEW ZEALAND, NICARAGUA, NIGER, NIGERIA, NORWAY, North America, Northern Europe, OMAN, Oceania, PAKISTAN, PANAMA, PAPUA NEW GUINEA, PARAGUAY, PERU, PHILIPPINES, POLAND, PORTUGAL, PUERTO RICO, QATAR, REUNION, ROMANIA, RUSSIA, RWANDA, SAO TOME AND PRINCIPE, SAUDI ARABIA, SENEGAL, SERBIA, SEYCHELLES, SIERRA LEONE, SINGAPORE, SLOVAKIA, SLOVENIA, SOMALIA, SOUTH AFRICA, SOUTH SUDAN, SPAIN, SRI LANKA, SUDAN, SURINAME, SWAZILAND, SWEDEN, SWITZERLAND, SYRIA, South America, TAIWAN, TAJIKISTAN, TANZANIA, THAILAND, TIMOR-LESTE, TOGO, TONGA, TRINIDAD AND TOBAGO, TUNISIA, TURKEY, TURKMENISTAN, UGANDA, UKRAINE, UNITED ARAB EMIRATES, UNITED KINGDOM, UNITED STATES, URUGUAY, USGS Science Data Catalog (SDC), UZBEKISTAN, VENEZUELA, VIETNAM, WESTERN SAHARA, Western Europe, YEMEN, ZAMBIA, ZIMBABWE, circular economy, economy, environment, geoscientificInformation, industrial ecology, location, material flows, material life cycles, materials flow (commodities), metallic mineral resources, mineral deposits, nonmetallic mineral resources, society, Fewer tags Borehole hydrogeologic-unit top-surface altitudes, aquifer hydraulic properties, and groundwater-sample chloride-concentration data from 1906 through 2016 for the Virginia Eastern Shore A hydrogeologic framework was developed by USGS during 2016-19 to describe the groundwater system on the Virginia Eastern Shore. This USGS data release contains text files of (1) interpreted borehole hydrogeologic-unit top-surface altitudes, (2) summary values of previously documented estimates of aquifer hydraulic properties, and (3) groundwater-sample chloride concentrations and well summary statistics. In addition are shapefiles of altitude contours for 10 hydrogeologic-unit top surfaces, and for the groundwater 250 milligrams per liter chloride-concentration surface. This data release supports the following publication: McFarland, E.R., and Beach, T.A., 2019, Hydrogeologic framework of the Virginia Eastern... Categories: Data; Tags: Accomack County, Virginia, Atlantic Coastal Plain Physiographic Province, Delaware, Delmarva peninsula, Geophysics, All tags... Hydrology, Maryland, Northampton County, Virginia, Saint Marys confining unit, Stratigraphy, USGS Science Data Catalog (SDC), Virginia, Virginia Eastern Shore, Washington DC, Water Quality, Water Resources, Yorktown-Eastover aquifer system, aquifers, chloride, confining units, groundwater, groundwater flow, hydraulic properties, hydrogeologic framework, paleochannels, saltwater intrusion, saltwater movement, storativity, transmissivity, water supply, water supply and demand, water-resource management, Fewer tags