{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "John W Brakebill", "hasEmail": "mailto:jwbrakeb@usgs.gov"}, "description": "A digital hydrologic network was developed to support SPAtially Referenced Regression on Watershed \nattributes (SPARROW) models within selected regions of the United States. These regions correspond \nwith the U.S. Geological Survey's National Water Quality Assessment (NAWQA) Program Major River \nBasin (MRB) study units 2, 3, 4, 5, and 7 (Preston and others, 2009).  MRB2, covers the South \nAtlantic-Gulf and Tennessee River basins.  MRB3, covers the Great Lakes, Ohio, Upper Mississippi, \nand Souris-Red-Rainy River basins.  MRB4, covers the Missouri River basins.  MRB5, covers the \nLower Mississippi, Arkansas-White-Red, and Texas-Gulf River basins.  MRB7, covers the Pacific \nNorthwest River basins. \n\t\t\nThe digital hydrologic network described here represents surface-water pathways (MRB_E2RF1) \nand associated catchments (MRB_E2RF1WS). It serves as the fundamental framework to spatially \nreference and summarize explanatory information supporting nutrient SPARROW models (Brakebill \nand others, 2011; Wieczorek and LaMotte, 2011). The principal geospatial dataset used to support \nthis regional effort was based on an enhanced version of a 1:500,000 scale digital stream-reach \nnetwork (ERF1_2) (Nolan et al., 2002). Enhancements included associating over 3,500 water-quality \nmonitoring sites to the reach network, improving physical locations of stream reaches at or near \nmonitoring locations, and generating drainage catchments based on 100m elevation data.\n\t\t\nA unique number (MRB_ID) identifies each reach as a single unit. This unique number is also shared \nby the catchment area drained by the reach, thus spatially linking the hydrologically connected \nstreams and the respective drainage area characteristics. In addition, other relevant physical, \nenvironmental, and monitoring information can be associated to the common network and accessed \nusing the unique identification number.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9EQBCK0", "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.c85f91fe-2d12-4278-a7be-3ed19f5cd881.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_c85f91fe-2d12-4278-a7be-3ed19f5cd881", "keyword": ["Conterminous United States", "MRB", "MRB2", "MRB3", "MRB4", "MRB5", "MRB7", "Major River Basin", "NAWQA", "RF1", "SPARROW", "USGS:c85f91fe-2d12-4278-a7be-3ed19f5cd881", "environment", "geoscientificInformation", "inlandWaters", "network", "reach", "reservoir", "river", "stream", "water quality"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-128.290499, 23.033207, -64.959844, 52.450082", "theme": ["geospatial"], "title": "A Digital Hydrologic Network Supporting NAWQA MRB SPARROW Modeling--MRB_E2RF1WS"}