/* DATA DESCRIPTION:
Citation:	Wickham, James (2019): A United States national database of stream confluence landscape characteristics [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.909230
Abstract:	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.
Keyword(s):	EnviroAltas; fluvial networks; NLCD; StreamCat
Coverage:	MEDIAN LATITUDE: 37.950000 * MEDIAN LONGITUDE: -102.300000 * SOUTH-BOUND LATITUDE: 27.700000 * WEST-BOUND LONGITUDE: -123.800000 * NORTH-BOUND LATITUDE: 48.200000 * EAST-BOUND LONGITUDE: -80.800000
Event(s):	USA_cont * LATITUDE START: 48.200000 * LONGITUDE START: -123.800000 * LATITUDE END: 27.700000 * LONGITUDE END: -80.800000 * LOCATION: United States of America
Parameter(s):	File name (File name) * PI: Wickham, James (wickham.james@epa.gov)
	File format (File format) * PI: Wickham, James (wickham.james@epa.gov)
	File size [kByte] (File size) * PI: Wickham, James (wickham.james@epa.gov)
	Uniform resource locator/link to file (URL file) * PI: Wickham, James (wickham.james@epa.gov)
License:	Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/)
Size:	68 data points
*/
File name	File format	File size [kByte]	URL file
Confluence_pts	shapefiles	38349.455	https://hs.pangaea.de/Maps/Wickham_2019/Confluence_pts.zip
Streams	shapefiles	1216418.740	https://hs.pangaea.de/Maps/Wickham_2019/Streams.zip
state_48	shapefiles	49296.136	https://hs.pangaea.de/Maps/Wickham_2019/state_48.zip
Ecology_CatWs_	DBF	174930.862	https://hs.pangaea.de/Maps/Wickham_2019/Ecology_CatWs_.dbf
Geology_Cat	DBF	230060.866	https://hs.pangaea.de/Maps/Wickham_2019/Geology_Cat.dbf
Geology_Ws	DBF	230060.866	https://hs.pangaea.de/Maps/Wickham_2019/Geology_Ws.dbf
Hydrology_CatWs	DBF	315935.879	https://hs.pangaea.de/Maps/Wickham_2019/Hydrology_CatWs.dbf
LC2001Cat	DBF	338199.974	https://hs.pangaea.de/Maps/Wickham_2019/LC2001Cat.dbf
LC2001Ws	DBF	338199.974	https://hs.pangaea.de/Maps/Wickham_2019/LC2001Ws.dbf
LC2011Cat	DBF	338199.974	https://hs.pangaea.de/Maps/Wickham_2019/LC2011Cat.dbf
LC2011Ws	DBF	338199.974	https://hs.pangaea.de/Maps/Wickham_2019/LC2011Ws.dbf
LncCvrChgWs	DBF	338199.974	https://hs.pangaea.de/Maps/Wickham_2019/LncCvrChgWs.dbf
LndCvrChgCat	DBF	338199.974	https://hs.pangaea.de/Maps/Wickham_2019/LndCvrChgCat.dbf
Physical_Cat	DBF	344560.894	https://hs.pangaea.de/Maps/Wickham_2019/Physical_Cat.dbf
Physical_Ws	DBF	306394.155	https://hs.pangaea.de/Maps/Wickham_2019/Physical_Ws.dbf
Stressor_Cat	DBF	204616.343	https://hs.pangaea.de/Maps/Wickham_2019/Stressor_Cat.dbf
Stressor_Ws	DBF	210977.356	https://hs.pangaea.de/Maps/Wickham_2019/Stressor_Ws.dbf