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August 13, 2026International Journal of Climatology

A Multi‐Model Ensemble Reveals a Diverging Hydrological Cycle in the Upper and Lower Transboundary Brahmaputra River Basin

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Authors

PDPriyam DekaIndian Institute of Technology DelhiMSManabendra SahariaIndian Institute of Technology DelhiSJSharad JainIndian Institute of Technology Gandhinagar

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Implication

Randomized trial assesses hydrological cycle variations in transboundary Brahmaputra basin, indicating diverse impacts in upper and lower regions.

Key Points

  • This study aims to assess the trends and variability in water budget components of the Brahmaputra basin from 1981 to 2020.
  • Implemented a multi-model ensemble using Indian Land Data Assimilation System (ILDAS).
  • Analyzed components like precipitation, evapotranspiration, and runoff over 39 years.
  • Examined spatial divergence in hydrological cycles between the upper and lower basin areas.
  • No significant long-term trend in basin-averaged precipitation, ET, and runoff.
  • Upper basin shows increasing precipitation and ET, while lower basin experiences decreasing winter precipitation and runoff.
  • Trends in total water storage anomaly (TWSA) variability are linked to groundwater and river volumes.

Cite This Study

Deka et al. (2026) studied this question.

synapsesocial.com/papers/6a7d768a2b0e0cff3f63fe51https://doi.org/10.1002/joc.70549
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