Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Mean Annual R-factor, 1971-2000
This data set represents the average annual R-factor, rainfall-runoff erosivity measure, 
compiled for every catchment of NHDPlus for the conterminous United States. The 
source data are from Christopher Daly of the Spatial Climate Analysis Service, Oregon 
State University, and George Taylor of the Oregon Climate …