{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Michael E. Wieczorek", "hasEmail": "mailto:mewieczo@usgs.gov"}, "description": "This data set represents the average normalized atmospheric (wet) deposition, in kilograms, of \nAmmonium (NH4) for the year 2002 compiled for every catchment of NHDPlus for the conterminous \nUnited States. Estimates of NH4 deposition are based on National Atmospheric Deposition Program \n(NADP) measurements (B. Larsen, U.S. Geological Survey, written commun., 2007). De-trending \nmethods applied to the year 2002 are described in Alexander and others, 2001. NADP site selection \nmet the following criteria: stations must have records from 1995 to 2002 and have a minimum of 30 \nobservations.\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 Agency \n(USEPA), and contractors, found that this method produces the best quality NHD catchments \nusing an automated process (USEPA, 2007). The NHDPlus dataset is organized by 18 \nProduction Units that cover the conterminous United States.\n\t\t\nThe NHDPlus version 1.1 data are grouped by the U.S. Geologic Survey's  Major River Basins \n(MRBs, Crawford and others, 2006).  MRB1, covering the New England and Mid-Atlantic River \nbasins, contains NHDPlus Production Units 1 and 2.  MRB2, covering the South Atlantic-Gulf \nand Tennessee River basins, contains NHDPlus Production Units 3 and 6.  MRB3, covering the \nGreat Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy River basins, contains NHDPlus \nProduction Units 4, 5, 7 and 9.  MRB4, covering the Missouri River basins, contains NHDPlus \nProduction Units 10-lower and 10-upper.  MRB5, covering the Lower Mississippi, \nArkansas-White-Red, and Texas-Gulf River basins, contains NHDPlus Production Units 8, 11 \nand 12.  MRB6, covering the Rio Grande, Colorado and Great Basin River basins, contains \nNHDPlus Production Units 13, 14, 15 and 16.  MRB7, covering the Pacific Northwest River basins, \ncontains NHDPlus Production Unit 17.  MRB8, covering California River basins, contains NHDPlus \nProduction Unit 18.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9Y0FDV0", "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.a84f603a-293a-4dbb-a90e-fca36fbb5efb.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_a84f603a-293a-4dbb-a90e-fca36fbb5efb", "keyword": ["Pacific Northwest", "inlandWaters", "CALI", "MRB7", "MRB8", "Conterminous United States", "Ammonium (NH4)", "NHDPlus", "South Atlantic-Gulf and Tennessee", "GLMR", "NAWQA", "NEMA", "USGS:a84f603a-293a-4dbb-a90e-fca36fbb5efb", "Major River Basin", "MRB5", "Catchment", "MRB6", "MORI", "MRB3", "MRB4", "MRB1", "MRB2", "environment", "Missouri", "SPARROW", "Great Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy", "PANW", "SAGT", "Inlandwaters", "COGB", "MRB", "New England and Mid-Atlantic", "geoscientificInformation", "California", "Lower Mississippi, Arkansas-White-Red, and Texas-Gulf", "LMTG", "Rio Grande, Colorado, and Great Basin"], "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) for the Conterminous United States: Normalized Atmospheric Deposition for 2002, Ammonium (NH4)"}