Attributes for NHDPlus Catchments (Version 1.1): Basin Characteristics, 2002
This data set represents basin characteristics, compiled for every catchment in 
NHDPlus for the conterminous United States. These characteristics are basin 
shape index, stream density, sinuosity, mean elevation, mean slope, and number 
of road-stream crossings. The source data sets are the U.S. Environmental …