articleNature CommunicationsJan 16, 2025GOLD OA

Hydroclimatic extremes threaten groundwater quality and stability

SASimon Andreas SchroeterAMAlice May OrmeKLKatharina LehmannRLRobert LehmannNMNarendrakumar M. Chaudhari

Max Planck Institute for Biogeochemistry · Friedrich Schiller University Jena · +2 more institutions

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Abstract

Heavy precipitation, drought, and other hydroclimatic extremes occur more frequently than in the past climate reference period (1961-1990). Given their strong effect on groundwater recharge dynamics, these phenomena increase the vulnerability of groundwater quantity and quality. Over the course of the past decade, we have documented changes in the composition of dissolved organic matter in groundwater. We show that fractions of ingressing surface-derived organic molecules increased significantly as groundwater levels declined, whereas concentrations of dissolved organic carbon remained constant. Molecular composition changeover was accelerated following 2018's extreme summer drought. These findings demonstrate…

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Topics
Keywords
  • Groundwater
  • Quality (philosophy)
  • Environmental science
  • Stability (learning theory)
  • Water resource management
  • Geology
  • Computer science
  • Geotechnical engineering
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