Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 8
Articles | Volume 30, issue 8
https://doi.org/10.5194/hess-30-2433-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-2433-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 8
Research article
 | 
28 Apr 2026
Research article |  | 28 Apr 2026

Climate change and irrigation expansion reshape the water pressure and upstream–downstream interactions in the Lancang–Mekong River Basin

Hongling Zhao, Zilong Zhao, Khosro Morovati, Dongsheng Zhang, and Fuqiang Tian

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Short summary
This study quantifies irrigation water pressure and upstream–downstream interactions in the Lancang–Mekong Basin under climate change. Results show increasing irrigation pressure, with dry-season demand reaching 59 % of available water by 2040. Key subregions exhibit a structural shift from internally to externally driven pressures, highlighting spatial heterogeneity and nonlinear dynamics. Findings inform vulnerable components, transboundary responsibility, and differentiated water governance.
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