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Federal
National Hydrography Dataset Plus - NHDPlus
U.S. Environmental Protection Agency —
This high-level metadata data document will be supplemented with detailed regional metadata at a later date. The NHDPlusV2 is an integrated suite of application-ready... -
Federal
Attributes for NHDplus Catchments (Version 1.1) for the Conterminous United States: Population Density, 2000
Department of the Interior —
This data set represents the average population density, in number of people per square kilometer multiplied by 10 for the year 2000, compiled for every catchment of... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: 30-Year Average Annual Minimum Temperature, 1971-2000
Department of the Interior —
This data set represents the 30-year (1971-2000) average annual minimum temperature in Celsius multiplied by 100 compiled for every catchment of NHDPlus for the... -
Federal
Russian River Integrated Hydrologic Model (RRIHM): Watershed Digital Elevation Model
Department of the Interior —
This is a 1/3 arc-second (approx. 10 meters) National Elevation Dataset (NED) digital elevation model (DEM) covering the Russian River watershed. All elevation values... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) in the Conterminous United States: Artificial Drainage (1992) and Irrigation Types (1997)
Department of the Interior —
This tabular dataset represents the estimated area of artificial drainage for the year 1992 and irrigation types for the year 1997 compiled for every catchment of... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Nutrient Inputs from Fertilizer and Manure, Nitrogen and Phosphorus (N&P), 2002
Department of the Interior —
This data set represents the estimated amount of nitrogen and phosphorus in kilograms for the year 2002, compiled for every catchment of NHDPlus for the conterminous... -
Federal
Attributes for NHDPlus Catchments (Version 1.1)for the Conterminous United States: Contact Time, 2002
Department of the Interior —
This data set represents the average contact time, in units of days, compiled for every catchment of NHDPlus for the conterminous United States. Contact time, as... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: STATSGO Soil Characteristics
Department of the Interior —
This data set represents estimated soil variables compiled for every catchment of NHDPlus for the conterminous United States. The variables included are cation... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Level 3 Ecoregions
Department of the Interior —
This data set represents the estimated area of level 3 ecological landscape regions (ecoregions), as defined by Omernik (1987), compiled for every catchment of... -
Federal
Potential Explanatory Variables for Groundwater Quality in the Redding-Red Bluff Shallow Aquifer Assessment Study Unit, 2018-2019: California GAMA Priority Basin Project
Department of the Interior —
This data release codifies and attributes explanatory variables that could potentially influence groundwater quality at 50 groundwater wells used for domestic water... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: NLCD 2001 Land Use and Land Cover
Department of the Interior —
This data set represents the estimated area of land use and land cover from the National Land Cover Dataset 2001 (LaMotte, 2008), compiled for every catchment of... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: 30-Year Average Annual Precipitation, 1971-2000
Department of the Interior —
This data set represents the 30-year (1971-2000) average annual precipitation in millimeters multiplied by 100 compiled for every catchment of NHDPlus for the... -
Federal
Attributes for NHDPlus Catchments (Version 1.1): Level 3 Nutrient Ecoregions, 2002
Department of the Interior —
This data set represents the area of each level 3 nutrient ecoregion in square meters, compiled for every catchment of NHDPlus for the conterminous United States. The... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: NLCD 2001 Tree Canopy
Department of the Interior —
This data set represents the mean percentage of tree canopy from the Canopy Layer of the National Land Cover Dataset 2001, (LaMotte and Wieczorek, 2010), compiled for... -
Federal
Potential Explanatory Factors for Groundwater Quality in the Northern Sierra Nevada Foothills Domestic-Aquifer Assessment Study Units, 2015-2017: California GAMA Priority Basin Project
Department of the Interior —
This data release codifies and attributes explanatory factors that could potentially impact groundwater quality at 142 groundwater sites (wells or developed springs)... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Surficial Geology
Department of the Interior —
This data set represents the area of surficial geology types in square meters compiled for every catchment of NHDPlus for the conterminous United States. The source... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Average Saturation Excess-Overland Flow, 2002
Department of the Interior —
This data set represents the average value of saturation overland flow, in percent of total streamflow, compiled for every catchment of NHDPlus for the conterminous... -
Federal
Attributes for NHDPlus Catchments (Version 1.1): Basin Characteristics, 2002
Department of the Interior —
This data set represents basin characteristics, compiled for every catchment in NHDPlus for the conterminous United States. These characteristics are basin shape... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Normalized Atmospheric Deposition for 2002, Total Inorganic Nitrogen
Department of the Interior —
This data set represents the average normalized atmospheric (wet) deposition, in kilograms, of Total Inorganic Nitrogen for the year 2002 compiled for every catchment... -
Federal
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: NLCD 2001 Imperviousness
Department of the Interior —
This data set represents the mean percent impervious surface from the Imperviousness Layer of the National Land Cover Dataset 2001 (LaMotte and Wieczorek, 2010),...