Compound Flooding: A Phenomenon
Flooding has always been one of the most common natural disasters in the United States. However, the flood risk for coastal cities has significantly increased over the past century. Roughly 40% of the U.S. population lives in the country's coastal areas. According to a new study published in Nature Climate Change , these coastal cities are facing an increased risk of severe flooding due to a phenomenon known as compound flooding. What is Compound Flooding? Compound flooding occurs when storm surge and heavy rainfall occur at the same time. This phenomenon exacerbates the level of flooding that normally would have occurred if just one of these events had happened alone. These flooding events usually happen in one of two ways: Heavy rainfall on land can severely add to the depth and size of storm surge that forces its way up and over the shoreline. Storm surge can elevate sea water to a level where the gravity-driven flow of stormwater systems is greatly slowed down ...