Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Basin Characteristics, 2002

This tabular data set represents basin characteristics for the year 2002 compiled for every MRB_E2RF1
catchment of selected Major River Basins (MRBs, Crawford and others, 2006). These characteristics
are reach catchment shape index, stream density, sinuosity, mean elevation, mean slope and number
of road-stream crossings. The source data sets are based on a modified version of the U.S. Environmental
Protection Agency's (USEPA) RF1_2 and include enhancements to support national and regional-scale
surface-water quality modeling (Nolan and others, 2002; Brakebill and others, 2011) and the U.S. Census
Bureau's TIGER/Line Files (U.S. Census Bureau,2006).

The MRB_E2RF1 catchments are based on a modified version of the U.S. Environmental Protection
Agency's (USEPA) ERF1_2 and include enhancements to support national and regional-scale
surface-water quality modeling (Nolan and others, 2002; Brakebill and others, 2011).

Data were compiled for every MRB_E2RF1 catchment for the conterminous United States covering
New England and Mid-Atlantic (MRB1), South Atlantic-Gulf and Tennessee (MRB2), the Great Lakes,
Ohio, Upper Mississippi, and Souris-Red-Rainy (MRB3), the Missouri (MRB4), the Lower Mississippi,
Arkansas-White-Red, and Texas-Gulf (MRB5), the Rio Grande, Colorado, and the Great basin (MRB6),
the Pacific Northwest (MRB7) river basins, and California (MRB8).