Arid Zone Research ›› 2021, Vol. 38 ›› Issue (5): 1484-1496.doi: 10.13866/j.azr.2021.05.31

• Ecology and Environment • Previous Articles    

Remote sensing evaluation of ecological environment in Urumqi City and analysis of driving factors

Pariha Helili1,2(),ZAN Mei1,2(),Alimjan Kasim1,2   

  1. 1. College of Geography and Tourism, Xinjiang Normal University, Urumqi 830054, Xinjiang, China
    2. Silk Road Economic Belt Urban Development Research Center, Xinjiang Normal University, Urumqi 830054, Xinjiang, China
  • Received:2021-01-26 Revised:2021-07-05 Online:2021-09-15 Published:2021-09-24
  • Contact: Mei ZAN E-mail:1601250145@qq.com;zanmei1102@163.com

Abstract:

The ecological environment quality assessment is essential to the sustainable development of the regional social economy. This paper takes Urumqi, Xinjiang, as the research area, preprocessed the Landsat series data of 2000, 2010, and 2019. The principal component analysis method was used to construct the Remote Sensing Ecological Index (RSEI), and the single factor analysis and the multi-factor interaction analysis method were used in the geographic detector to influence the eight factors of RSEI (population density, land use type, altitude, economics density, green degree, humidity, heat, and dryness). The quantitative detection of the degree of influence was conducted, after which the dominant factors affecting the ecological environment quality of the study area were revealed. The results show that: (1) The average RSEI values of Urumqi in 2000, 2010, and 2019 were 0.21, 0.21, and 0.23, respectively, showing an increasing trend. During the study period, Urumqi's ecological improvement area was greater than the area that deteriorated, indicating the ecological environment quality of Urumqi. In a state of improvement; (2) In the past 20 years, among the eight impact factors in the study area, the single factor heat index has the strongest explanatory power for the spatial differentiation characteristics of RSEI; (3) The spatial distribution characteristics of the ecological environment in the study area are the result of the mutual interaction of multiple influencing factors. Considering the interaction of multiple factors, population density, greenness index, and dryness index are the main influencing factors and key driving forces of the quality of regional ecological environment. Evaluating the quality of the regional ecological environment, understanding the status of the ecological environment and mastering its changing laws do not only aid the promotion of sustainable development of the regional economy but also has important practical significance and reference value for constructing urban ecological civilization.

Key words: Urumqi City, ecological environment, driving factors, remote sensing ecological index, geographic detector