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Scientific Investigations Report 2006–5101–D

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5101–D

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Table A1. Sources of geographical information system (GIS) and digital data used to derive study basins in the Willamette Valley ecoregion, Oregon and Washington.

Basin
characteristics
GIS data theme Data theme source Reference or data source
Data used to delineate basins
Watershed boundaries National Elevation Dataset (NED) U.S. Geological Survey U.S. Geological Survey, 1999, and U.S. Geological Survey Seamless Data Distribution System web site: http://seamless.usgs.gov; data extracted, 2002 and 2003.
Digital Raster Graphics (DRG) U.S. Geological Survey and 
Regional Ecosystem Office Regional Ecosystem Office (REO) geographical information system (GIS) Data web site: http://www.reo.gov/gis/data/DRG_Files/northwest.asp; data extracted, 2002–05.
National Hydrography Dataset (NHD) U.S. Geological Survey U.S. Geological Survey National Hydrography Dataset web site: http://nhd.usgs.gov/; data extracted 2005.
Data used as geographical information system (GIS) variables
Demography Census Blocks and Block Groups 2000, short (SF1) and long forms (SF3) U.S. Census Bureau Geolytics Census 2000 Blocks short form CD and Census CD/DVD 2000 long form.
Infrastructure Census 2000 Topologically Integrated Geographic Encoding and Referencing system (TIGER) Line® files U.S. Census Bureau Census TIGER web site: http://www.census.gov/geo/www/tiger/
National Pollutant Discharge Elimination System (NPDES) U.S. Environmental 
Protection Agency U.S. Environmental Protection Agency Envirofacts web site: http://www.epa.gov/enviro/index_java.html; data extracted, 2002.
Toxics Release Inventory U.S. Environmental 
Protection Agency U.S. Environmental Protection Agency Envirofacts web site: http://www.epa.gov/enviro/index_java.html; data extracted, 2002.
Land use/land cover, 
including riparian buffer National Land Cover Dataset (NLCD) 2001 U.S. Geological Survey U.S. Geological Survey, 2005; web site: http://www.mrlc.gov/mrlc2k_nlcd.asp; data extracted, 2005.
National Hydrography Dataset (NHD) U.S. Geological Survey U.S. Geological Survey National Hydrography Dataset web site: http://nhd.usgs.gov/; data extracted 2005.
Soil State Soils Geographic (STATSGO) database Natural Resources 
Conservation Service National Resources Conservation Service web site: http://www.ncgc.nrcs.usda.gov/products/datasets/statsgo/; data extracted, 2002.
Hydrologic soil groups Natural Resources 
Conservation Service National Resources Conservation Service web site: http://www.ncgc.nrcs.usda.gov/products/datasets/statsgo/; data extracted, 2002.
Hydrologic landscape regions Hydrologic landscape regions U.S. Geological Survey U.S. Geological Survey web site: http://water.usgs.gov/GIS/metadata/usgswrd/XML/hlrus.xml; data extracted, 2002.
Ecoregion Ecoregions U.S. Environmental 
Protection Agency U.S. Environmental Protection Agency web site: http://www.epa.gov/wed/pages/ecoregions/level_iii.htm and http://www.epa.gov/wed/pages/ecoregions/level_iv.htm; data extracted, 2002 and 2005; Omernik (1987).
Topography National Elevation Dataset (NED) U.S. Geological Survey U.S. Geological Survey, 1999, and U.S. Geological Survey Seamless Data Distribution System web site: http://seamless.usgs.gov; data extracted, 2002 and 2005.
Climate Daymet Climatological Summaries for the Conterminous United States, 1980-97 University of Montana, Numerical Terradynamic Simulation Group and National Center for Atmospheric Research (NCAR) Daymet web site: http://daymet.ntsg.umt.edu/data/data.htm; data extracted, 2005.
FRAGSTATS National Land Cover Dataset (NLCD) 2001 U.S. Geological Survey and 
National Oceanic and Atmospheric Administration McGarigal, Kevin, and Marks, B.J., 1995, FRAGSTATS web site: http://www.umass.edu/landeco/research/fragstats/fragstats.html; data extracted, 2005. Coastal Change and Analysis Program (C-CAP), 2006, web site: http://www.csc.noaa.gov/crs/lca/pacificcoast.html.

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