Attributes for MRB_E2RF1 Catchments in Selected Major River Basins of the Conterminous United States: Contact Time, 2002
This tabular data set represents the average contact time, in units of days, compiled for every 
MRB_E2RF1 catchment of Major River Basins (MRBs, Crawford and others, 2006). Contact time, 
as described in Vitvar and others (2002), is defined as the baseflow residence time in the subsurface. 
The source data set was …