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  • May. 13, 2025

Arid Land Geography ›› 2025, Vol. 48 ›› Issue (4): 599-611.doi: 10.12118/j.issn.1000-6060.2024.520

• The Third Xinjiang Scientific Expedition • Previous Articles     Next Articles

Geological disaster hazard assessment and prediction in the Ili River Basin based on CMIP6 future scenarios

CHEN Shilong1,2(), MENG Qingkai1(), DAI Yong1,3, YANG Liqiang4, WU Han1   

  1. 1. State Key Laboratory of Mountain Hazards and Engineering Resilience, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, Sichuan, China
    2. College of Geophysics, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    3. College of Civil Engineering and Water Resources, Qinghai University, Xining 810016, Qinghai, China
    4. College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
  • Received:2024-09-02 Revised:2024-09-23 Online:2025-04-25 Published:2025-04-18
  • Contact: MENG Qingkai E-mail:slslug@163.com;mengqingkai@imde.ac.cn

Abstract:

To assess the impact of future climate change on geological hazard zoning in the Ili River Basin, Xinjiang, China, climate data from different scenarios of the Coupled Model Intercomparison Project Phase 6 (CMIP6) were selected to analyze climate change characteristics under various shared socioeconomic pathway (SSP) scenarios from 2021 to 2040. The information quantity-random forest model was employed to conduct the geological hazard assessment and generate a prediction map. The results indicate that: (1) High and extremely high hazard areas are primarily concentrated in northern Yining County, southern Nilka County, and northern Xinyuan County in the middle mountainous hilly regions; debris flow hazard areas are mainly located in southern Zhaosu County, the northern region of Keguqin Mountain in Huocheng County, Hejing County, and the middle-to-high mountainous areas in eastern Nilka County. (2) From 2021 to 2040, the Ili River Basin is projected to experience a general increase in temperature and precipitation, with a maximum annual average temperature rise of approximately 1.53 ℃ and a maximum precipitation increase of about 19.3 mm. (3) Under future SSP126, SSP245, SSP370, and SSP585 scenarios, high-hazard areas for landslides and rockfalls are expected to expand. The severity of landslides in southern Yining County, northern Xinyuan County, and southwestern Nilka County, as well as debris flows in northern Khorgas City and Yining County, is anticipated to worsen, with maximum increases of 17.31% and 8.77%, respectively. The findings of this study provide valuable insights for future disaster prevention and mitigation efforts in the Ili River Basin.

Key words: CMIP6, geological disasters, hazard assessment prediction, climate change, Ili River Basin