Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 16
Articles | Volume 30, issue 16
https://doi.org/10.5194/hess-30-5281-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-5281-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 16
Research article
 | 
20 Aug 2026
Research article |  | 20 Aug 2026

Runoff thresholds, runoff generation mechanisms, and catchment characteristics: a global synthesis

Zhen Cui and Fuqiang Tian

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Short summary
This study synthesizes storm-runoff thresholds from 138 catchments worldwide to clarify why threshold behavior differs across environments. We show that runoff thresholds are often shaped by catchment wetness, storage, soils, geology, and flow-path connectivity, not rainfall alone. The results support a connectivity-based framework for interpreting runoff generation across diverse landscapes.
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