U.S. Geological Survey
Open-File Report 03–263
Base-Flow Index Grid for the Conterminous United States
By David M. Wolock
This 1-kilometer raster (grid) dataset for the conterminous United States
was created by interpolating base-flow index (BFI) values estimated at U.S.
Geological Survey (USGS) streamgages. Base flow is the component of streamflow
that can be attributed to ground-water discharge into streams.
Wolock, D.M., 2003, Base-flow index grid for the conterminous United
States: U.S. Geological Survey Open-File Report 03–263, digital data
set, available on World Wide Web at URL
http://water.usgs.gov/lookup/getspatial?bfi48grd
For additional information about watershed processes and modeling, visit:
http://ks.water.usgs.gov/pages/49-Watershed-Processes
For additional information contact:
David Wolock
U.S. Geological Survey
4821 Quail Crest Place
Lawrence, KS 66049-3839
Telephone: (785) 832-3528
Fax: (785) 832-3500
Email: dwolock@usgs.gov
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