Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 6
Articles | Volume 30, issue 6
https://doi.org/10.5194/hess-30-1607-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-1607-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 6
Research article
 | 
27 Mar 2026
Research article |  | 27 Mar 2026

Baseflow in karst regions is significantly higher than the global average and exhibits spatial variability

Ze Yuan, Qiuwen Zhou, Yuan Li, Yuluan Zhao, and Shengtian Yang

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Short summary
This study explores how underground water supports river flow in landscapes with soluble rock and caves. We examined 1375 river basins worldwide and found that, on average, 78 % of river flow in these areas comes from stored groundwater, compared with 60 % globally. We also found strong regional differences linked to vegetation and environmental conditions, and this share has increased in recent decades. These results can support better water management.
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