Groundwater Geochemistry and Hydrological Processes

Summary

Groundwater geochemistry examines the chemical composition of subsurface waters and the reactions that govern solute distribution, while hydrological processes describe the movement of water through recharge, storage and discharge. Together, they underpin water‐resource assessments, ecosystem resilience and contaminant transport. Chemical tracers such as major ions, stable isotopes and trace elements reveal water–rock interactions, weathering pathways and residence times. Hydrological dynamics—from diffuse infiltration in recharge zones to focused discharge at springs or wells—are controlled by geological heterogeneity, climatic variability and anthropogenic withdrawal. Recent advances integrate geochemical data with numerical flow models and remote‐sensing observations to quantify water budgets, forecast aquifer response to pumping and evaluate vulnerability to contamination. This interdisciplinary framework informs sustainable management by linking recharge estimates, aquifer connectivity and biogeochemical cycling. A global perspective highlights transboundary systems and climate‐sensitive wetlands where groundwater sustains biodiversity and human livelihood. Ongoing challenges include reducing uncertainty in conceptual models, scaling point measurements to regional aquifers and anticipating the impact of land‐use change on groundwater quality and quantity.

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Groundwater Geochemistry and Hydrological Processes publication trend

The graph below shows the total number of articles in groundwater geochemistry and hydrological processes across all publications each year (not limited to Nature Index journals).

Technical terms

Aquifer: A permeable geological formation that transmits and stores groundwater.

Recharge: The process by which water infiltrates the ground to replenish an aquifer.

Discharge: The outflow of groundwater to springs, rivers or wells.

Stable isotope tracers: Non-radioactive isotope ratios (e.g. δ18O, δ2H) used to identify water sources and flow paths.

Hydrochemical facies: Classification of groundwater based on dominant dissolved ions and chemical signatures.

Residence time: The average time water spends within an aquifer before discharge.

References

  1. Long-term spatiotemporal variability in high Andean wetlands in northern Chile. The Science of The Total Environment (2020).
  2. Regional Groundwater Modeling of the Guarani Aquifer System. Water (2020).

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