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Change in the Magnitude of River Flooding in the United States, 1965-2015

Published by U.S. EPA Office of Air and Radiation (OAR) - Office of Atmospheric Programs (OAP) | U.S. Environmental Protection Agency | Catalog Last Checked: May 06, 2026 at 12:31 AM | Dataset Last Updated: August 02, 2016 at 12:00 AM
This figure shows changes in the size and frequency of flooding events in rivers and streams in the United States between 1965 and 2015. Blue upward-pointing symbols show locations where floods have become larger; brown downward-pointing symbols show locations where floods have become smaller. Data were analyzed by Louise Slater and Gabriele Villarini at the University of Iowa. For more information: www.epa.gov/climatechange/science/indicators

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