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Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for slope (gwava-s_slop) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents soil surface slope, in percent times 1000, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in shallow ground water. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear approach to national-scale Ground-WAter Vulnerability Assessment (GWAVA)... Tags: Conterminous United States, Ground water, Ground water contamination, Ground water pollution, Ground water susceptibility, All tags... NAWQA, NSDI, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, Slope, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Input Files and WRTDS Model Output for the two major tributaries of Lake Koocanusa: Mass Removal Canadian discrete water quality data and daily streamflow records were evaluated using the Weighted Regression on Time, Discharge, and Seasons (WRTDS) model implemented with the EGRET R package (Hirsch et al. 2010, Hirsch and De Cicco 2015). Models were used to estimate loads of solutes and evaluate trends for three constituents of interest (selenium, nitrate, and sulfate). Six models were generated; one model for each of the three constituents of interest, in each of the two major tributaries to Lake Koocanusa: the Kootenay River at Fenwick (BC08NG0009), and the Elk River above Highway 93 Near Elko (BC08NK0003). Data were obtained by downloading data from the British Columbia Water Tool (https://kwt.bcwatertool.ca/surface-water-quality,... Categories: Data; Tags: British Columbia, Canada, Coal Mining, Elk River, Koocanusa Reservoir, All tags... Kootenai River, Kootenay Boundary, Lake Koocanusa, Lake Koocanusa, Nitrate, Selenium, Sulfate, Transboundary, Upper Kootenai, Water Quality, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for carbonate rocks (gwava-s_crox) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the presence or absence of Valley and Ridge carbonate rocks in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in shallow ground water. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear approach to national-scale Ground-WAter Vulnerability... Tags: Carbonate rocks, Conterminous United States, Ground water, Ground water contamination, Ground water pollution, All tags... Ground water susceptibility, NAWQA, NSDI, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water - Model output data set (gwava-s_out) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents predicted nitrate concentration in shallow, recently recharged ground water, in milligrams per liter, in the conterminous United States, and was generated by a national nonlinear regression model based on 16 input parameters. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear approach to national-scale Ground-WAter Vulnerability... Tags: Conterminous United States, Ground water, Ground water contamination, Ground water pollution, Ground water susceptibility, All tags... NAWQA, NSDI, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for irrigation tailwater recovery (gwava-s_twre) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the area of National Resources Inventory irrigation system, tailwater recovery conservation practice, in square kilometers, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in shallow ground water. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate.... Tags: Conterminous United States, Ground water, Ground water contamination, Ground water pollution, Ground water susceptibility, All tags... Irrigation tailwater recovery, NAWQA, NRI, NSDI, National Land Cover Data, National Resources Inventory, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for fresh surface water withdrawal (gwava-s_swus) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the amount of fresh surface water withdrawal for irrigation, in megaliters per day, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in shallow ground water. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear approach to national-scale... Tags: Conterminous United States, Fresh surface water withdrawal, Ground water, Ground water contamination, Ground water pollution, All tags... Ground water susceptibility, Irrigation water use, NAWQA, NSDI, National Land Cover Data, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Raster dataset showing the probability of detecting atrazine/desethyl-atrazine in ground water in Colorado, hydrogeomorphic regions and atrazine use estimates included. These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This dataset is one of eight datasets produced by this study. Four of the datasets predict the probability of detecting atrazine and(or) desethyl-atrazine (a breakdown product of atrazine) in ground water in Colorado; the other four predict the probability of detecting elevated concentrations of nitrate in ground water in Colorado. The four datasets that predict the probability of atrazine and(or) desethyl-atrazine (atrazine/DEA)... Tags: Atrazine, Colorado, Desethyl-atrazine, Ground water, Ground-water contamination, All tags... Ground-water probability, Ground-water quality, Ground-water susceptibility, Ground-water vulnerability, NSDI, Nitrate, Probability, Probability of ground-water contamination, Susceptibility, USGS Science Data Catalog (SDC), Vulnerability, environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Raster dataset showing the probability of detecting atrazine/desethyl-atrazine in ground water in Colorado, hydrogeomorphic regions not included and atrazine use estimates included. These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This dataset is one of eight datasets produced by this study. Four of the datasets predict the probability of detecting atrazine and(or) desethyl-atrazine (a breakdown product of atrazine) in ground water in Colorado; the other four predict the probability of detecting elevated concentrations of nitrate in ground water in Colorado. The four datasets that predict the probability of atrazine and(or) desethyl-atrazine (atrazine/DEA)... Tags: Atrazine, Colorado, Desethyl-atrazine, Ground water, Ground-water contamination, All tags... Ground-water probability, Ground-water quality, Ground-water susceptibility, Ground-water vulnerability, NSDI, Nitrate, Probability, Probability of ground-water contamination, Susceptibility, USGS Science Data Catalog (SDC), Vulnerability, environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Raster dataset showing the probability of elevated concentrations of nitrate in ground water in Colorado, hydrogeomorphic regions and fertilizer use estimates included. These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This dataset is one of eight datasets produced by this study. Four of the datasets predict the probability of detecting atrazine and(or) desethyl-atrazine (a breakdown product of atrazine) in ground water in Colorado; the other four predict the probability of detecting elevated concentrations of nitrate in ground water in Colorado. The four datasets that predict the probability of atrazine and(or) desethyl-atrazine (atrazine/DEA)... Tags: Atrazine, Colorado, Desethyl-atrazine, Ground water, Ground-water contamination, All tags... Ground-water probability, Ground-water quality, Ground-water susceptibility, Ground-water vulnerability, NSDI, Nitrate, Probability, Probability of ground-water contamination, Susceptibility, USGS Science Data Catalog (SDC), Vulnerability, elevation, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for semiconsolidated sand aquifers (gwava-dw_semc) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the presence or absence of semiconsolidated sand aquifers in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in ground water used for drinking. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear approach to national-scale Ground-WAter Vulnerability... Tags: Conterminous United States, Drinking water, Ground water, Ground water contamination, Ground water pollution, All tags... Ground water susceptibility, NAWQA, NSDI, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, Semiconsolidated sand aquifers, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for irrigation tailwater recovery (gwava-dw_twre) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the area of National Resources Inventory irrigation system, tailwater recovery conservation practice, in square kilometers, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in ground water used for drinking. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of... Tags: Conterminous United States, Drinking water, Ground water, Ground water contamination, Ground water pollution, All tags... Ground water susceptibility, Irrigation tailwater recovery, NAWQA, NRI, NSDI, National Land Cover Data, National Resources Inventory, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for histosols (gwava-s_hist) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the amount of histosols soil taxonomic order, in percent, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in shallow ground water. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear approach to national-scale Ground-WAter Vulnerability... Tags: Conterminous United States, Ground water, Ground water contamination, Ground water pollution, Ground water susceptibility, All tags... Histosols, NAWQA, NSDI, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for Dunne overland flow (gwava-dw_dun) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents saturation overland flow estimated by TOPMODEL, in percent of streamflow, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in ground water used for drinking. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear approach to national-scale... Tags: Conterminous United States, Drinking water, Dunne overland flow, Ground water, Ground water contamination, All tags... Ground water pollution, Ground water susceptibility, NAWQA, NSDI, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for water input (gwava-s_wtin) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents "water input," the ratio of the total area of irrigated land to precipitation, in square kilometers per centimeter, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in shallow ground water. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear... Tags: Conterminous United States, Ground water, Ground water contamination, Ground water pollution, Ground water susceptibility, All tags... Irrigated land, NAWQA, NSDI, National Land Cover Data, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, Precipitation, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for population density (gwava-s_popd) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents 1990 block group population density, in people per square kilometer, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in shallow ground water. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear approach to national-scale Ground-WAter Vulnerability... Tags: Conterminous United States, Ground water, Ground water contamination, Ground water pollution, Ground water susceptibility, All tags... NAWQA, NSDI, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, Population density, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for confined manure (gwava-dw_conf) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the average annual nitrogen input from confined animal manure, 1992 and 1997, in kilograms per hectare, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in ground water used for drinking. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear... Tags: Confined animal manure, Conterminous United States, Drinking water, Ground water, Ground water contamination, All tags... Ground water pollution, Ground water susceptibility, NAWQA, NSDI, National Land Cover Data, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for farm fertilizer (gwava-s_ffer) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the average annual nitrogen input from commercial fertilizer applied to agricultural lands, 1992-2001, in kilograms per hectare, in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in shallow ground water. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate.... Tags: Conterminous United States, Farm Fertilizer, Ground water, Ground water contamination, Ground water pollution, All tags... Ground water susceptibility, NAWQA, NSDI, National Land Cover Data, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Raster dataset showing the probability of elevated concentrations of nitrate in ground water in Colorado, hydrogeomorphic regions and fertilizer use estimates not included. These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This dataset is one of eight datasets produced by this study. Four of the datasets predict the probability of detecting atrazine and(or) desethyl-atrazine (a breakdown product of atrazine) in ground water in Colorado; the other four predict the probability of detecting elevated concentrations of nitrate in ground water in Colorado. The four datasets that predict the probability of atrazine and (or) desethyl-atrazine (atrazine/DEA)... Tags: Atrazine, Colorado, Desethyl-atrazine, Ground water, Ground-water contamination, All tags... Ground-water probability, Ground-water quality, Ground-water susceptibility, Ground-water vulnerability, NSDI, Nitrate, Probability, Probability of ground-water contamination, Susceptibility, USGS Science Data Catalog (SDC), Vulnerability, elevation, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Model output data set (gwava-dw_out) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents predicted nitrate concentration in ground water used for drinking, in milligrams per liter, in the conterminous United States, and was generated by a national nonlinear regression model based on 14 input parameters. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear approach to national-scale Ground-WAter Vulnerability... Tags: Conterminous United States, Drinking water, Ground water, Ground water contamination, Ground water pollution, All tags... Ground water susceptibility, NAWQA, NSDI, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for wetlands (gwava-s_wetl) These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the percent of woody wetlands and emergent herbaceous wetlands land cover in the conterminous United States. The data set was used as an input data layer for a national model to predict nitrate concentration in shallow ground water. Nolan and Hitt (2006) developed two national models to predict contamination of ground water by nonpoint sources of nitrate. The nonlinear approach to national-scale Ground-WAter... Tags: Conterminous United States, Ground water, Ground water contamination, Ground water pollution, Ground water susceptibility, All tags... NAWQA, NSDI, National Land Cover Data, National Water-Quality Assessment Program, Nitrate, Nitrate concentration, Nonlinear model, Nutrients, USGS Science Data Catalog (SDC), Wetlands, environment, geoscientificInformation, inlandWaters, inlandWaters, Fewer tags 1 2 3 »