Bulletin of Surveying and Mapping ›› 2025, Vol. 0 ›› Issue (1): 59-65.doi: 10.13474/j.cnki.11-2246.2025.0110

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Response of eco-environmental quality to climate change and its relationship with water and sediment changes in the Yellow River basin

LI Pengxuan1, WANG Tao2,3, WANG Deying4, DU Yibo5   

  1. 1. China Coal Aerial Survey and Remote Sensing Group Co.,Ltd., Xi'an 710100, China;
    2. College of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China;
    3. Institute of Territorial Space, Xi'an University of Science and Technology, Xi'an 710054, China;
    4. Xi'an Survey and Mapping Institute, Xi'an 710001,China;
    5. Shaanxi Guotu Information Technology Co., Ltd.,Xi'an 710001, China
  • Received:2024-05-22 Published:2025-02-09

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Abstract: The response of ecological environment quality to climate change and its relationship with water and sediment changes can provide scientific basis for ecological protection and high-quality development in the Yellow River basin. Based on the MODIS data products, temperature, precipitation, runoff and sediment transport data from 2000 to 2022, combined with the remote sensing ecological index (RSEI) of multiple indicators, the spatial and temporal variation characteristics of RSEI in the Yellow River basin and its response to temperature and precipitation, as well as its relationship with runoff and sediment transport are analyzed by linear regression and correlation analysis. The results show that: ①From 2000 to 2022, the RSEI of the Yellow River basin and the upper and middle reaches of the Yellow River basin showed an upward trend, while the lower reaches showed a downward trend. The middle reaches of the Yellow River basin had the fastest growth rate and the largest proportion of significantly increased area. ② The RSEI of the Yellow River basin is significantly positively correlated with annual average temperature and annual precipitation, with an area ratio of 17.29 % and 27.97 %, respectively, concentrated in the central Loess Plateau region. ③The annual runoff and annual sediment load in the upper and middle reaches of the Yellow River basin are significantly positively correlated with RSEI. The overall and downstream areas of the basin are positively correlated with annual runoff and negatively correlated with sediment load. Under the background of climate change, the ecological environment quality of the Yellow River basin is generally improving, and the internal relationship between the change of ecological environment quality and the change of runoff and sediment transport still needs further study.

Key words: remote sensing ecological index, climate change, water-sediment relationship, the Yellow River basin

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