The Keetch-Byram Drought Index assesses the risk of fire by representing the net effect of evapotranspiration and precipitation in producing cumulative moisture deficiency in deep duff and upper soil layers. The index ranges from zero, the point of no moisture deficiency, to 800, the maximum drought that is possible.
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Keetch-Byram Drought Index
What can I do with these data?
- View the amount of precipitation necessary to return the soil to full field capacity.
How do I use the site?
- Use your cursor to select between “Current Conditions” for the Contiguous U.S. or Alaska
- To save image: right-click image and select “Save Image As...”
- View archived maps for the Contiguous U.S., select “US48” under “Image Archive”
Bradshaw, Larry S.; Deeming, John E.; Burgan, Robert E.; Cohen, Jack D., compilers. 1984. The 1978 National Fire-Danger Rating System: technical documentation. Gen. Tech. Rep. INT-169. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station. 44 pp.
Burgan, R.E.; Andrews, P.L.; Bradshaw, L.S.; Chase, C.H.; Hartford, R.A.; Latham, D.J. 1997. WFAS: wildland fire assessment system, Fire Management Notes, 57(2):14-17; 1997.
Burgan, R.E.; Chase, C.H., Bartlette, R.A; NDVI and Derived Image Data, Data Archives 1998, 1999, USDA-FS, RMRS. RMRS-GTR-27-CD. 1999.
Burgan, R.E.; Hardy, C.C.; Ohlen, D.O.; Fosnight, G. 1997. Landcover Ground Sample Data. United States Department of Agriculture, Forest Service, General Technical Report INT-GTR-368CD. 1997.
Burgan, R.E.; Hardy, C.C.; Ohlen, D.O.; Fosnight, G.; Treder, R. 1999. Ground sample data for the national land cover characteristics database. United States Department of Agriculture, Forest Service, General Technical Report RMRS-GTR-41, Rocky Mountain Research Station,Ogden, Utah. 12 pages.
Burgan, R.E.; Hartford, R.A. 1993. Monitoring vegetation greenness with satellite data. United States Department of Agriculture, Forest Service, General Technical Report INT-297, Intermountain Forest and Range Experiment Station, Ogden, Utah. 13 pages.
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Burgan, Robert E.; Hartford, Roberta A. 1997. Live vegetation moisture calculated from NDVI and used in fire danger rating. 13th Conf. on Fire and For. Met., Lorne, Australia, Oct. 27-31, 1997. Jason Greenlee, ed. IAWF, Fairfield, WA 99012.
Burgan, R.E., Klaver, R.W., Klaver, J.M. 1998. Fuel Models and Fire Potential from Satellite and Surface Observations. International Journal of Wildland Fire 8(3):159-170.
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Carlson, J.D.; Burgan, R.E.; Engle, D.M. 1996. Using the Oklahoma mesonet in developing a near-real- time, next generation fire danger rating system. In: 22nd Conference on Agricultural & Forest Meteorology with Symposium on Fire & Forest Meteorology and the 12th Conference on Biometeorology and Aerobiology, Atlanta, Georgia, January 28-February 2, 1996. American Meteorological Society, Boston, Massachusetts, Pages 249-252
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Fuquay Donald J. (1982), Positive Cloud-to-Ground Lightning in Summer Thunderstorms. J. Geophys. Res. 87., No. C9, 7131-7140
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Hardy, C.C.; Menakis, J.P.; Schmidt, K.M.; Long, D.G.; Simmerman, D.G.; Johnston, C.M. 1999. Coarse-scale spatial data for Wildland Fire and Fuel Management. Rocky Mountain Research Station. Available at http://www.fs.fed.us/fire/fuelman/
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USDA Forest Service. 1995. Weather Information Management System User's Guide. Washington, DC: U.S. Department of Agriculture, Forest Service, Fire and Aviation Management.
Data Source: USFS Wildland Fire Assessment System
Data Type: Land-based Station
Period of Record: 22 Jan 1997 to Present
Data Format: images