{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Mackenzie Keith", "hasEmail": "mailto:mkeith@usgs.gov"}, "description": "The Tillamook Bay subbasins and Nehalem River basins encompass 1,369 and 2,207 respective square \nkilometers of northwestern Oregon and drain to the Pacific Ocean. The Tillamook, Trask, Wilson, Kilchis, \nand Miami Rivers flow into Tillamook Bay near the towns of Tillamook and Garibaldi. The Wilson and Trask \nRiver basins cover the largest areas (500 and 451 square kilometers, respectively) whereas the Tillamook \nand Kilchis Rivers encompass similar sized areas (156 and 169 square kilometers, respectively) and the \nMiami River the smallest area (94 square kilometers). In cooperation with the U.S. Army Corps of Engineers, \nthe U.S. Geological Survey completed a reconnaissance-level assessment of channel condition and \nbed-material transport relevant to the permitting of in-stream gravel extraction along the the major alluvial \nportions of six river systems, including the lowermost 14.1 km of the Tillamook River, 16.3 km of the \nTrask River, 15.2 km of the Wilson River, 7.8 km of the Kilchis River, 11.6 km of the Miami River, and \n31.4 km of the Nehalem River. To support these analyses, digital channel maps were produced to depict \nchannel and floodplain conditions in the Tillamook Bay sub-basins and Nehalem River basin from different \ntime periods. GIS layers defining the wetted channel and bar features and channel centerline in the study \narea were developed for four time periods: 1939, 1967, 2005, and 2009. For this project, the active channel \nwas defined as area typically inundated during annual high flows, and includes the low-flow channel as \nwell as side channels, islands, and channel-flanking gravel bars. The wetted channel and bar feature \ndatasets were developed by digitizing from aerial photographs. Aerial photographs from 1939 and 1967 \nwere scanned, rectified, and mosaicked for this project (See metadata for each photograph set for more \ninformation on the rectification process and resolution of each dataset). Digital orthophotographs from 2005 \nand 2009 are publicly available.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9X1VN8O", "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.397018ba-cbad-4869-b5ca-f4bb0abcbc40.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_397018ba-cbad-4869-b5ca-f4bb0abcbc40", "keyword": ["Kilchis River", "Miami River", "Nehalem Bay", "Nehalem River", "Oregon Coast Range", "Tillamook Bay", "Tillamook County", "Tillamook River", "Trask River", "USGS:397018ba-cbad-4869-b5ca-f4bb0abcbc40", "Wilson River", "channel stability", "environment", "fluvial geomorphology", "geoscientificInformation", "historical channel change", "inlandWaters", "sediment transport"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-123.945714, 45.655002, -123.751669, 45.733618", "theme": ["geospatial"], "title": "Wetted channel and bar features for the Nehalem River, Oregon in 1939"}