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photo of Zheng Duan on Lund webpage

Zheng Duan

Senior lecturer

photo of Zheng Duan on Lund webpage

Advancing hydrological modeling through multivariate calibration of multi-layer soil moisture dynamics

Author

  • Yan He
  • Huihui Mao
  • Chen Wang
  • Jinghao Hu
  • Sarawut Ninsawat
  • Xianfeng Song
  • Guifei Jing
  • Runkui Li
  • Mingyu Wang
  • Zheng Duan

Summary, in English

Study region: The Meichuan Basin, China Study focus: Soil water processes are critical in hydrological modeling, yet most studies focus on surface moisture due to data limitations, which hampers accurate simulations of root zone soil moisture dynamics. To address this gap, we developed three calibration schemes: M1 and M2, two benchmarks that rely solely on traditional streamflow data and incorporate both streamflow data and top-layer soil moisture data, respectively. In contrast, M3 integrates both streamflow data and multi-layer soil moisture information from SMCI 1.0. These schemes aim to assess the added value of integrating multi-layer soil moisture data to enhance hydrological modeling performance. New hydrological insights for the region: The M3 scheme yielded the most accurate simulation of the spatial and temporal distribution of multi-layer soil moisture compared to M1 and M2 benchmarks. In this subtropical humid basin, the M3 model effectively captured the pronounced fluctuations in soil moisture driven by frequent and intense precipitation events, as well as the seasonal variability between wet and dry periods. M3 also improved the accuracy of evapotranspiration simulations across all subbasins, while maintaining acceptable streamflow simulations at gauge stations. These findings underscore the importance of using advanced multi-layer soil moisture data in models to regulate hydrological processes and control water distribution within the hydrological cycle.

Department/s

  • BECC: Biodiversity and Ecosystem services in a Changing Climate
  • Dept of Physical Geography and Ecosystem Science
  • MERGE: ModElling the Regional and Global Earth system

Publishing year

2025-02

Language

English

Publication/Series

Journal of Hydrology: Regional Studies

Volume

57

Document type

Journal article

Publisher

Elsevier

Topic

  • Oceanography, Hydrology and Water Resources

Keywords

  • Hydrological modeling
  • Multivariate calibration
  • Spatio-temporal multi-layer soil moisture data SMCI
  • Streamflow, evapotranspiration
  • Water balance

Status

Published

ISBN/ISSN/Other

  • ISSN: 2214-5818