{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Michael E. Wieczorek", "hasEmail": "mailto:mewieczo@usgs.gov"}, "description": "This tabular dataset represents the estimated area of artificial drainage for the year 1992 \nand irrigation types for the year 1997 compiled for every catchment of NHDPlus for the \nconterminous United States. The source datasets were derived from tabular National \nResource Inventory (NRI) datasets created by the National Resources Conservation \nService (NRCS, U.S. Department of Agriculture, 1995, 1997).  Artificial drainage is \ndefined as subsurface drains and ditches.  Irrigation types are defined as gravity and \npressure.  Subsurface drains are described as conduits, such as corrugated plastic \ntubing, tile, or pipe, installed beneath the ground surface to collect and/or convey \ndrainage. Surface drainage field ditches are described as graded ditches for collecting \nexcess water.  Gravity irrigation source is described as irrigation delivered to the farm \nand/or field by canals or pipelines open to the atmosphere; and water is distributed by \nthe force of gravity down the field by:\n\t\t\t (1) A surface irrigation system (border, basin, furrow, corrugation, wild flooding, etc.) or\n\t\t\t (2) Sub-surface irrigation pipelines or ditches. Pressure irrigation source is described \nas irrigation delivered to the farm and/or field in pump or elevation-induced pressure pipelines, \nand water is distributed across the field by:\n\t\t\t  (1) Sprinkle irrigation (center pivot, linear move, traveling gun, side roll, hand move, \nbig gun, or fixed set sprinklers), or\n\t\t\t  (2) Micro irrigation (drip emitters, continuous tube bubblers, micro spray or micro sprinklers). \nNRI data do not include Federal lands and are thus excluded from this dataset.  The tabular data for \ndrainage were spatially apportioned to the National Land Cover Dataset (NLCD, Kerie Hitt, \nwritten commun., 2005) and the tabular data for irrigation were spatially apportioned to an enhanced \nversion of the National Land Cover Dataset (NLCDe, Nakagaki and others 2007)\n\t\t\nThe NHDPlus Version 1.1 is an integrated suite of application-ready geospatial datasets that \nincorporates many of the best features of the National Hydrography Dataset (NHD) and the \nNational Elevation Dataset (NED). The NHDPlus includes a stream network (based on the \n1:100,00-scale NHD), improved networking, naming, and value-added attributes (VAAs). \nNHDPlus also includes elevation-derived catchments (drainage areas) produced using a \ndrainage enforcement technique first widely used in New England, and thus referred to as \n\"the New England Method.\" This technique involves \"burning in\" the 1:100,000-scale NHD \nand when available building \"walls\" using the National Watershed Boundary Dataset (WBD). \nThe resulting modified digital elevation model (HydroDEM) is used to produce hydrologic \nderivatives that agree with the NHD and WBD. Over the past two years, an interdisciplinary \nteam from the U.S. Geological Survey (USGS), and the U.S. Environmental Protection \nAgency (USEPA), and contractors, found that this method produces the best quality NHD \ncatchments using an automated process (USEPA, 2007). The NHDPlus dataset is organized \nby 18 Production Units that cover the conterminous United States.\n\t\t\nThe NHDPlus version 1.1 data are grouped by the U.S. Geological Survey's  Major River \nBasins (MRBs, Crawford and others, 2006).  MRB1, covering the New England and Mid-Atlantic \nRiver basins, contains NHDPlus Production Units 1 and 2.  MRB2, covering the South \nAtlantic-Gulf and Tennessee River basins, contains NHDPlus Production Units 3 and 6.  \nMRB3, covering the Great Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy River \nbasins, contains NHDPlus Production Units 4, 5, 7 and 9.  MRB4, covering the Missouri \nRiver basins, contains NHDPlus Production Units 10-lower and 10-upper.  MRB5, covering \nthe Lower Mississippi, Arkansas-White-Red, and Texas-Gulf River basins, contains NHDPlus \nProduction Units 8, 11 and 12.  MRB6, covering the Rio Grande, Colorado and Great Basin \nRiver basins, contains NHDPlus Production Units 13, 14, 15 and 16.  MRB7, covering the \nPacific Northwest River basins, contains NHDPlus Production Unit 17.  MRB8, covering \nCalifornia River basins, contains NHDPlus Production Unit 18.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9YCU5XS", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.6f608721-c54a-4413-b1ae-04fc09527bf9.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_6f608721-c54a-4413-b1ae-04fc09527bf9", "keyword": ["Artificial Drainage", "CALI", "COGB", "California", "Catchment", "Conterminous United States", "GLMR", "Great Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy", "Inlandwaters", "Irrigation", "LMTG", "Lower Mississippi, Arkansas-White-Red, and Texas-Gulf", "MORI", "MRB", "MRB1", "MRB2", "MRB3", "MRB4", "MRB5", "MRB6", "MRB7", "MRB8", "Major River Basin", "Missouri", "NAWQA", "NEMA", "NHDPlus", "National Resource Inventory", "New England and Mid-Atlantic", "PANW", "Pacific Northwest", "Rio Grande, Colorado, and Great Basin", "SAGT", "SPARROW", "South Atlantic-Gulf and Tennessee", "Subsurface drains Drainage", "Tile drains", "USGS:6f608721-c54a-4413-b1ae-04fc09527bf9", "ditches", "environment", "geoscientificInformation", "inlandWaters"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-127.910792, 23.243486, -65.327751, 51.657387", "theme": ["geospatial"], "title": "Attributes for NHDPlus Catchments (Version 1.1) in the Conterminous United States: Artificial Drainage (1992) and Irrigation Types (1997)"}