What does this research mean for the field?

Storm-runoff threshold behavior across diverse global catchments is best explained by a connectivity-based framework where rainfall forcing interacts with catchment wetness states and structural constraints to activate runoff pathways. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Synthesize reported storm-runoff thresholds, dominant runoff generation mechanisms, wetness-dependent transitions, and associated catchment characteristics across experimental catchments globally.

August 22, 2026Hydrology and earth system sciencesOpen Access

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

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Authors

ZCZhen CuiMinistry of Water Resources of the People's Republic of China FTFuqiang TianState Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering

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Implication

Global synthesis reveals wetness-driven shifts in storm-runoff mechanisms across 138 catchments, highlighting structural and hydrological connectivity controls.

Key Points

Synthesize reported storm-runoff thresholds, dominant runoff generation mechanisms, wetness-dependent transitions, and associated catchment characteristics across experimental catchments globally.
Reviewed and synthesized hydrological data from 138 experimental catchments worldwide spanning diverse climates and landscape settings.
Evaluated reported threshold metrics (rainfall, hydrological-state, and composite indicators) and analyzed associations between runoff mechanisms and soil-geology-hydrogeology descriptors using co-occurrence analysis.
Hydrological-state indicators (e.g., antecedent soil moisture, storage, groundwater level) and composite rainfall–state metrics were reported more frequently than rainfall-only metrics.
Subsurface- and saturation-related mechanisms predominated in humid catchments, with increasing wetness driving transitions from surface-dominated responses toward saturation- or groundwater-influenced pathways.
Runoff generation mechanisms co-occurred consistently with soil depth, texture, permeability, lithology, and hydrogeology, supporting a connectivity-based runoff activation framework.

Cite This Study

Cui et al. (2026) studied this question.

synapsesocial.com/papers/6a895f53ca7ade938187ddf9 https://doi.org/10.5194/hess-30-5281-2026

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Implication

Global synthesis reveals wetness-driven shifts in storm-runoff mechanisms across 138 catchments, highlighting structural and hydrological connectivity controls.

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

Discussion

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Implication

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Cite This Study

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

Discussion

Member takes

Implication

Key Points

Cite This Study

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