20210719 14564600 1.0 TRUE Change in River Flood Frequency This figure shows changes in the frequency of flooding events in rivers and streams in the Chesapeake Bay watershed between 1965 and 2015. Blue upward-pointing symbols show locations where floods have become more frequent; dark blue downward-pointing symbols show locations where floods have become less frequent. Data were analyzed by Louise Slater and Gabriele Villarini at the University of Iowa. For more information: www.epa.gov/climatechange/science/indicators EPA