Coastal groundwater, a crucial freshwater resource, faces threats from overabstraction and sea-level rise, yet global patterns of groundwater level changes and seawater intrusion susceptibility are not well understood. Here the authors conduct a global assessment using data from ~480,000 coastal sites, revealing notable trends and highlighting areas for urgent monitoring and management to prevent salinization.
- Annika Nolte
- Steffen Bender
- Robert Reinecke
