U.S. Geological Survey
Open-File Report 03–264
Saturated Overland Flow Estimated from TOPMODEL for the Conterminous
United States
By David M. Wolock
This 5-kilometer resolution raster (grid) dataset for the conterminous United
States represents the average percentage of saturation overland flow in
total streamflow estimated by the watershed model TOPMODEL. Saturation overland
flow is simulated in TOPMODEL as precipitation that falls on saturated land-surface
areas and enters the stream channel.
TOPMODEL was applied to 5- by 5-kilometer areas across the conterminous
United States using national climate, soils, and terrain GIS datasets. The
model was run for 1,000 days for each 5- by 5-kilometer area. The average
percentage of saturation overland flow in total streamflow was computed
for the 1,000-day simulation in each grid cell.
Wolock, D.M., 2003, Saturation overland flow estimated by TOPMODEL
for the conterminous United States: U.S. Geological Survey Open-File Report
03–264, digital data set, available on World Wide Web at URL
http://water.usgs.gov/lookup/getspatial?satof48
For additional information about watershed processes and modeling, visit:
http://ks.water.usgs.gov/studies/watershed/
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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