Kallon et al. (2026) Estimating Baseflow Dynamics and Influencing Factors Using WHAT in the Wei River Basin, China

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Identification

• Journal: Hydrological Processes
• Year: 2026
• Date: 2026-09-01
• Authors: Hadji Ds Kallon, Peiyue Li, Stefanos Xenarios
• DOI: 10.1002/hyp.70698

Research Groups

• Institute of Hydrology and Water Resources, China University of Geosciences (Beijing)
• State Key Laboratory of Water Environment Simulation, Beijing Normal University

Short Summary

This study estimates annual baseflow in the Wei River Basin using the Web-based Hydrograph Analysis Tool (WHAT) and analyzes its relationship with groundwater levels and land use/land cover changes.

Objective

• Investigate the spatial and temporal variability of baseflow in the Wei River Basin and its interaction with groundwater levels

Study Configuration

• Spatial Scale: The study focuses on the Wei River Basin, a semi-humid region in China.
• Temporal Scale: The analysis covers a 10-year period (2010-2019) with daily streamflow records.

Methodology and Data

• Models used: Two-parameter recursive digital filter method within the WHAT programme
• Data sources: Streamflow data from five gauged watershed stations, groundwater-level monitoring data from 2010 to 2015

Main Results

• The total annual baseflow measured between 2010 and 2019 ranged from 29574.74 to 910078.73 m^3/s.
• The baseflow index (BFI) varied from 0.56 to 0.67, with an average BFI of 0.63 indicating that baseflow contributed approximately 64% of the long-term runoff in the examined watersheds.

Contributions

• This study provides a robust estimate of annual baseflow in the Wei River Basin and highlights the importance of considering land use/land cover changes in baseflow analysis.
• The results also reveal the dominant role of climate variability in driving decadal baseflow variation, while human-induced factors modulate this variability.

Funding

• National Natural Science Foundation of China (Grant No. 51879218)
• Beijing Municipal Science & Technology Commission (Grant No. Z191100001119000)

Citation

@article{Kallon2026Estimating,
  author = {Kallon, Hadji Ds and Li, Peiyue and Xenarios, Stefanos},
  title = {Estimating Baseflow Dynamics and Influencing Factors Using WHAT in the Wei River Basin, China},
  journal = {Hydrological Processes},
  year = {2026},
  doi = {10.1002/hyp.70698},
  url = {https://doi.org/10.1002/hyp.70698}
}