Algorithm finds that thousands of artificial levees are missing from US database
Levees are constructed to protect riverside towns from flooding, but they can also prevent natural processes important to river health. Credit: Infrogmation of New Orleans/Wikimedia, CC BY-SA 2.0
Over the past 300 years, humans have dramatically altered rivers through mining, draining, dredging, levee construction, and other activities. Artificial levees, for instance, provide a barrier between rivers and their floodplains to…