344 datasets found
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Federal
Data for Arsenic Variability and Groundwater Age in Three Water-Supply Wells in Southeast New Hampshire
Department of the Interior —
Three wells in New Hampshire were sampled bimonthly over three years to evaluate the temporal variability of arsenic concentrations and groundwater age. All samples... -
Federal
National Water-Quality Assessment (NAWQA) Study-Unit Investigations in the conterminous United States 1991-2001
Department of the Interior —
This is a coverage of the boundaries and codes used for the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program Study-Unit investigations in... -
Federal
Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA: Table 2. Detailed information on the calibration of dissolved gas models to dissolved gas concentrations (neon, argon, krypton, xenon, and nitrogen).
Department of the Interior —
High radium (Ra) concentrations in potable portions of the Cambrian-Ordovician (C-O) aquifer system were investigated using water-quality data and environmental... -
Federal
Application of nitrogen generated by cattle at dairies and feedlots to farm land in the United States Pacific Northwest for 2002
Department of the Interior —
This spatial data set was created by the U.S. Geological Survey (USGS) to represent the amount of nitrogen generated at confined cattle operations that was applied to... -
Federal
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 population density (gwava-dw_popd)
Department of the Interior —
This data set represents 1990 block group population density, in people per square kilometer, in the conterminous United States. This data set represents The data set... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Average Annual Daily Minimum Temperature, 2002
Department of the Interior —
This data set represents the average monthly minimum temperature in Celsius multiplied by 100 for 2002 compiled for every catchment of NHDPlus for the conterminous... -
Federal
1992 County Pesticide Use Estimates for 200 Compounds
Department of the Interior —
This dataset includes information for 200 pesticides on the average amount (pounds) applied to 87 agricultural crops and the acres of crops treated for counties... -
Federal
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 Hortonian overland flow (gwava-dw_hor)
Department of the Interior —
This data set represents infiltration excess overland flow estimated by TOPMODEL, in percent of streamflow, in the conterminous United States. The data set was used... -
Federal
Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Mean-Annual Actual Evapotranspiration, Estimated Using Regression Equation of Sanford and Selnick (2013)
Department of the Interior —
This tabular data set represents mean-annual actual evapotranspiration, estimated using the regression equation of Sanford and Selnick (2013) compiled for two spatial... -
Federal
Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: 30 Year (1971 - 2000) Mean Annual Maximum Temperature (Celsius) from 800m PRISM data
Department of the Interior —
This tabular data set represents 30 year (1971 - 2000) mean annual maximum temperature (Celsius) from 800m PRISM data compiled for two spatial components of the... -
Federal
Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Estimated Area of Subsurface Drainage on Agricultural Land, 1992
Department of the Interior —
This tabular data set represents the estimated percent area of subsurface drainage for the year 1992 compiled for two spatial components of the NHDPlus version 2 data... -
Federal
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)
Department of the Interior —
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... -
Federal
Data for Fluoride Occurrence in United States Groundwater
Department of the Interior —
Data from 38,105 wells were used to characterize fluoride occurrence in untreated United States groundwater. The data were retrieved from the U.S. Geological Survey... -
Federal
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Average Daily Maximum Temperature, 2002
Department of the Interior —
This tabular data set represents the average daily maximum temperature in Celsius multiplied by 100 for 2002, compiled for every MRB_E2RF1 catchment of selected Major... -
Federal
Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: STATSGO Soil Characteristics, Text Attributes
Department of the Interior —
This tabular data set represents the STATSGO Soil texture Attributes compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the... -
Federal
Data from Decadal Change in Groundwater Quality Web Site, 1988-2020
Department of the Interior —
Evaluating Decadal Changes in Groundwater Quality: Groundwater-quality data were collected from 5,000 wells between 1988-2001 (first decadal sampling event) by the... -
Federal
Data for Elevated Manganese Concentrations in United States Groundwater, Role of Land Surface-Soil-Aquifer Connections
Department of the Interior —
Chemical data from 43,334 wells were used to examine the role of land surface-soil-aquifer connections in producing elevated manganese concentrations (>300 µg/L)... -
Federal
Point data for four case studies related to testing of multi-order hydrologic position
Department of the Interior —
The location of a point (or pixel) within the conterminous U.S. can be assigned based on its position relative to the Nation’s stream network. Two metrics are... -
Federal
Attributes for NHDPlus Version 2.1 Flowlines for the Conterminous United States: Percent of Agriculture Land Subject to Select National Resource Inventory Conservation Practices, 2000-2012
Department of the Interior —
This metadata record describes 24 tabular data sets that estimate the percent of agricultural land that may be subject to select conservation practices for each year... -
Federal
Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Estimated Rate of Toxicity Weighted Use on Agricultural Land, 2009
Department of the Interior —
This tabular data set represents the estimated toxicity weighted use of pesticides on fish, benthic invertebrates and cladocerans on agricultural land in kilograms...
344 datasets found