Data in support of regression equations for estimating the magnitude and frequency of floods in urban areas in Tennessee and parts of Alabama, Georgia, Mississippi, North Carolina, and South Carolina

The Lower Mississippi-Gulf Water Science Center of the U.S. Geological Survey (USGS), in cooperation with the Tennessee Department of Transportation, computed at-site flood-frequency for 139 urban streamgages operated by the USGS in Tennessee and parts of Alabama, Georgia, Mississippi, North Carolina, and South Carolina. Urban imperviousness in the basins, based on the 2011 National Land Cover Database, was at least 10 percent (Homer and others, 2015). Drainage areas of the streamgage basins ranged from 0.15 - 161 square miles. Annual peak-flow data from the 1947 - 2022 water years were used in the study (U.S. Geological Survey, 2024). Peak-flow records used were unaffected by regulation. Flood quantiles estimated in the at-site [...]