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What is seawater intrusion? A hydrogeologist explains the shifting balance between fresh and salt water at the coast

  • Written by Holly Michael, Director, Delaware Environmental Institute, and Professor of Earth Sciences and Civil and Environmental Engineering, University of Delaware
What is seawater intrusion? A hydrogeologist explains the shifting balance between fresh and salt water at the coastIn 2022, California built an emergency drought barrier across the West False River near Oakley to protect against saltwater intrusion. AP Photo/Terry Chea

Seawater intrusion is the movement of saline water from the ocean or estuaries into freshwater systems. The seawater that has crept up the Mississippi River in the summer and early fall of 2023...

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