Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Estimated 30-Year (1971-2000) Average Annual Runoff Based on Flow Measured at Streamgages, Millimeters per Year
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This tabular data set represents estimated 30-year (1971-2000) average annual runoff in millimeters per year compiled for two spatial components of the NHDPlus...



