Barriers designed to prevent saltwater intrusion may worsen inland flooding

As Earth continues to warm, sea levels have risen at an accelerating rate—from 1.4 millimeters a year to 3.6 millimeters a year between 2000 and 2015. Flooding will inevitably worsen, particularly in low-lying coastal regions, where more than a billion people are estimated to live. Solutions are needed to protect homes, property and groundwater from flooding and the intrusion of saltwater.