Yang et al. (2026) Impacts of Temporally Compounding Hot-Dry Events on Agricultural Droughts via Vegetation in the Yangtze River Basin

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Identification

• Journal: Journal of Hydrologic Engineering
• Year: 2026
• Date: 2026-09-23
• Authors: Ruitong Yang, Zengchao Hao, Xueyin Di, Yitong Zhang
• DOI: 10.1061/jhyeff.heeng-6976

Research Groups

• Institute of Hydrology and Water Resources, Sichuan University
• Key Laboratory of Mountain Hazards and Environment, Sichuan Province
• State Key Laboratory of Hydroscience and Engineering, Tsinghua University

Short Summary

This study investigates the impact of temporally compounding hot-dry events on agricultural droughts in the Yangtze River Basin, highlighting the role of preseason vegetation greening in driving summer soil moisture deficits.

Objective

• Investigate the combined effects of antecedent vegetation conditions and subsequent meteorological droughts on agricultural droughts in the Yangtze River Basin.

Study Configuration

• Spatial Scale: The study focuses on the Yangtze River Basin (YZRB) in China.
• Temporal Scale: The study period spans from 2000 to 2022, with a focus on three specific years: 2013, 2018, and 2022.

Methodology and Data

• Models used: Not specified.
• Data sources: Satellite data (NDVI) and reanalysis data for precipitation and evaporation.

Main Results

• Preseason vegetation greening can cause summer soil moisture deficits in the YZRB.
• Temporally compounding hot-dry events have a significant impact on agricultural droughts, with lower soil moisture levels observed during these events compared to dry summer conditions only.
• The contribution from preseason vegetation to summer soil moisture deficits is quantified using multiple linear regression.

Contributions

• This study provides new insights into the climate extreme-vegetation relationship under a greening Earth, highlighting the importance of considering both antecedent vegetation conditions and subsequent meteorological droughts in understanding agricultural droughts.
• The findings can inform strategies for mitigating agricultural droughts in the YZRB and other regions with similar hydroclimatic conditions.

Funding

• National Natural Science Foundation of China (Grant No. 51879214)
• Sichuan Province Science and Technology Program (Grant No. 2020YJ0034)

Citation

@article{Yang2026Impacts,
  author = {Yang, Ruitong and Hao, Zengchao and Di, Xueyin and Zhang, Yitong},
  title = {Impacts of Temporally Compounding Hot-Dry Events on Agricultural Droughts via Vegetation in the Yangtze River Basin},
  journal = {Journal of Hydrologic Engineering},
  year = {2026},
  doi = {10.1061/jhyeff.heeng-6976},
  url = {https://doi.org/10.1061/jhyeff.heeng-6976}
}