Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: 30-Year Average Annual Precipitation, 1971-2000

This tabular data set represents the 30-year (1971-2000) catchment-average total annual
precipitation in millimeters multiplied by 100 compiled for every MRB_E2RF1 catchment
of selected Major River Basins (MRBs, Crawford and others, 2006). The source data were
the United States Average Monthly or Annual Minimum Precipitation, 1971 - 2000 raster
data set produced by the PRISM Group at Oregon State University.

The MRB_E2RF1 catchments are based on a modified version of the 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).