Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: STATSGO Soil Characteristics

This tabular data set represents estimated soil variables compiled for every MRB_E2RF1
catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The variables
included are cation exchange capacity, percent calcium carbonate, slope, water-table depth,
soil thickness, hydrologic soil group, soil erodibility (k-factor), permeability, average water
capacity, bulk density, percent organic material, percent clay, percent sand, and percent silt.
The source data set is the State Soil ( STATSGO ) Geographic Database (Wolock, 1997).

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).