Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: NLCD 2001 Imperviousness
This tabular data set represents the mean percent impervious surface from the Imperviousness 
Layer of the National Land Cover Dataset 2001,  (LaMotte and Wieczorek, 2010), compiled for 
every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). 
The source data set represents …