Wickham James wickham.james@epa.gov 2019 A United States national database of stream confluence landscape characteristics dataset https://doi.org/10.1594/PANGAEA.909230 2019-11-29T09:17:43 Although rarely studied, stream confluences may be biological hotspots within fluvial networks and the surrounding landscape. To invigorate study of the ecological value and role of stream confluences in fluvial networks, we have produced a database of stream confluences and their associated watershed attributes for the conterminous United States. The database includes 1,085,629 stream confluences and 383 attributes for each confluence that are organized into 15 database tables for both tributary and mainstem upstream catchments ("local" watersheds) and watersheds. Themes represented by the database tables include hydrology (e.g., headwater or not), land cover and land cover change, geology (e.g., sodium content of underlying lithosphere), physical condition (e.g., elevation), measures of ecological integrity, and stressors (e.g., impaired streams). We also used the measures of ecological integrity to assess the condition of the stream confluences. Aside from a generally positive east-to-west gradient in ecological condition, we found that approximately one-third of the confluences have markedly contrasting ecological conditions between mainstem and tributary, catchment and watershed, or both. -123.8 -80.8 27.7 48.2 -102.3 37.95 not specified USA_cont 48.2 -123.8 United States of America 27.7 -80.8 68 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ File name File name Wickham James wickham.james@epa.gov File name File format File format Wickham James wickham.james@epa.gov File format File size File size kByte size http://purl.obolibrary.org/obo/PATO_0000117 Wickham James wickham.james@epa.gov File size [kByte] Uniform resource locator/link to file URL file Wickham James wickham.james@epa.gov URL file citable EnviroAltas fluvial networks NLCD StreamCat author72631 event2848451 geocode1600 geocode1601 license21 param16143 param16144 param25541 param54251 pi72631 term1073204 term23894 term51675 term51676 term51677 term51678 topotype1