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Arid Land Geography ›› 2023, Vol. 46 ›› Issue (6): 911-921.doi: 10.12118/j.issn.1000-6060.2022.446

• Ecology and Environment • Previous Articles     Next Articles

Dynamic monitoring and prediction of eco-environmental quality in Yining City based on RSEI and ANN-CA-Markov model

CHEN Mianwei1,2(),FENG Dan1,2(),ZHANG Shikai1,2,JIANG Yu1,2,ZHANG Xinlan1,2   

  1. 1. School of Chemistry and Environmental Science, Yili Normal University, Yining 835000, Xinjiang, China
    2. Key Laboratory of Pollutant Chemistry and Environmental Treatment, Yili Normal University, Yining 835000, Xinjiang, China
  • Received:2022-09-07 Revised:2022-10-18 Online:2023-06-25 Published:2023-07-24
  • Contact: Dan FENG

Abstract:

Yining City, located at the northwest border of Xinjiang in the Ili River Valley, China, has fertile land, abundant water and biological resources, and favorable natural conditions for the development of agriculture, forestry, and animal husbandry. However, due to the rapid urbanization process, the ecology has been damaged, and the quality of the ecological environment has declined. Therefore, it is of great significance to scientifically and reasonably utilize Landsat TM5/OLI-TIRS8 remote sensing data to conduct a dynamic evaluation and prediction of the ecological environment in Yining City from 2006 to 2021 based on the remote-sensing ecological index (RSEI) and ANN-CA-Markov model. The results show that: (1) Greenness and humidity have a positive impact on the ecological level of Yining City, while dryness and heat have a negative impact. The main factors affecting the ecological environment quality of Yining City are, in order, greenness, heat, dryness, and humidity, which are consistent with the ecological conditions exhibited in the Ili River Valley region. (2) The average RSEI indicator of Yining City is 0.451, which is at a moderate level overall. The ecological environment quality change shows a trend of gradually narrowing extremes, but the areas with medium and poor RSEI indices are increasing year by year, and the overall ecological environment presents a stable-to-worse development trend. (3) It is predicted that by 2026 and 2031, the ecological environment in the northern slope region of Yining City will improve to a certain extent. In combination with the overall urban planning of Yining City, Xinjiang, from 2018 to 2035, the ecological environment quality in the urban area will still remain at a medium level in the future, and the city will continue to expand outward, resulting in a continuous reduction in arable land area.

Key words: RSEI, Landsat, eco-environmental quality prediction, ANN-CA-Markov model, Yining City