Wang et al. (2025) Simulation of Actual Evapotranspiration and Its Multiple-Timescale Attribution Analysis in the Upper Reaches of the Jinsha River, China

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Identification

• Journal: Water
• Year: 2025
• Date: 2025-11-23
• Authors: Jiaming Wang, Guangxing Ji
• DOI: 10.3390/w17233350

Research Groups

Not provided in the paper text.

Short Summary

This study quantified the contributions of climatic variation and anthropogenic activities to actual evapotranspiration (AET) at multiple timescales in the Upper Reaches of the Jinsha River (URJR), finding that both climate and human activities are dominant factors, with their relative importance varying by hydrological station.

Objective

• To quantify the contribution rates of climatic variation and anthropogenic activities on the actual evapotranspiration at multiple timescales in the Upper Reaches of the Jinsha River (URJR).

Study Configuration

• Spatial Scale: Upper Reaches of the Jinsha River (URJR).
• Temporal Scale: Monthly and quarterly; research period divided into base and variation periods based on runoff depth mutation years (e.g., 1987, 1988).

Methodology and Data

• Models used: BG mutation method, ABCD hydrological model, multiple-timescale Budyko model.
• Data sources: Monthly meteorological data, monthly hydrological data.

Main Results

• The mutation years of runoff depth were 1988 at Batang hydrological station and 1987 at Shigu hydrological station.
• Actual evapotranspiration at multiple timescales (quarterly and monthly) in the URJR showed a significant increase (p < 0.01), with growth rates ranging from 0.02 mm/a to 0.22 mm/a.
• Climatic variation was the dominant factor for actual evapotranspiration growth at multiple timescales (quarterly and monthly) at the Batang Hydrological Station, with a contribution ranging from 0.71 mm to 8.50 mm.
• Human activities were the dominant factors for actual evapotranspiration growth at multiple timescales (quarterly and monthly) at the Shigu hydrological station, with a contribution ranging from 0.60 mm to 9.62 mm.

Contributions

This study provides a quantitative assessment of the distinct impacts of climatic variation and anthropogenic activities on actual evapotranspiration at multiple timescales (monthly and quarterly) in the Upper Reaches of the Jinsha River, utilizing a combined approach of mutation analysis, hydrological modeling, and the Budyko framework.

Funding

Not provided in the paper text.

Citation

@article{Wang2025Simulation,
  author = {Wang, Jiaming and Ji, Guangxing},
  title = {Simulation of Actual Evapotranspiration and Its Multiple-Timescale Attribution Analysis in the Upper Reaches of the Jinsha River, China},
  journal = {Water},
  year = {2025},
  doi = {10.3390/w17233350},
  url = {https://doi.org/10.3390/w17233350}
}