Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 19
Articles | Volume 30, issue 19
https://doi.org/10.5194/hess-30-6115-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-6115-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 19
Research article
 | 
30 Sep 2026
Research article |  | 30 Sep 2026

Divergent responses of streamflow reanalysis errors to precipitation reanalysis errors modulated by catchment heterogeneity

Qiang Li, Tongtiegang Zhao, Zexin Chen, and Zeqing Huang

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Short summary
This paper explores how streamflow reanalysis responds to precipitation forcing errors across 671 catchments in the United States. For the Global Flood Awareness System v4.0 driven by European Centre for Medium-Range Weather Forecasts Reanalysis v5, each 1 mm increase in precipitation error causes a mean increase of 0.51 mm streamflow error. This response varies by catchments as humid regions amplify the increased errors up to 2.5 mm, but arid and snowy regions dampen or delay them by storage.
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