Biogeosciences
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Articles | Volume 23, issue 5
Articles | Volume 23, issue 5
https://doi.org/10.5194/bg-23-2045-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-2045-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 5
Research article
 | 
18 Mar 2026
Research article |  | 18 Mar 2026

Hydraulic Redistribution Decreases with Precipitation Magnitude and Frequency in a Dryland Ecosystem: A Data-Model Fusion Approach

Aneesh Kumar Chandel, Mitra Cattry, Yu Zhou, Hang Duong, Marcy E. Litvak, William T. Pockman, and Yiqi Luo

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Short summary
Hydraulic redistribution (HR) is a passive process in which water can move between wet and dry regions in the root zone by flowing through plant root systems. In this modeling study, we showed that adding HR to a process-based model improved soil moisture predictions, particularly in the top 30 cm. HR rates declined with increasing rainfall magnitude and frequency, but HR rates were also influenced by the length of dry spells between rainfall events.
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