Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Base-Flow Index
This tabular data set represents the mean base-flow index expressed as a percent, 
compiled for every catchment in NHDPlus for the conterminous United States. Base 
flow is the component of streamflow that can be attributed to ground-water discharge 
into streams. The source data set is Base-Flow Index for the …