Bulletin of Surveying and Mapping ›› 2021, Vol. 0 ›› Issue (2): 7-12.doi: 10.13474/j.cnki.11-2246.2021.0034

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Monitoring of ecological environment changes in the Yangtze River Economic Belt (Jiangsu province) from 1999 to 2020 and analysis of the driving forces of human activities

SONG Ke1,2, WANG Yujun1,2, LI Yin1,2   

  1. 1. Geological Survey of Jiangsu Province, Nanjing 210018, China;
    2. Natural Resources Satellite Application Technology Center of Jiangsu Province, Nanjing 210018, China
  • Received:2020-08-28 Revised:2020-12-16 Published:2021-03-09

Abstract: Coordinating the relationship between regional urbanization and ecological environment protection is one of the core issues to promote the sustainable development of Yangtze River Economic Belt in our country. According to the existing research, the response relationship between ecological environment changes and human activities drives lacks of supporting data corresponding to time and space, whose impact process is also unknown. This research takes full advantage of the multi-source satellite remote sensing technology in processing and extracting time and space information, takes the districts along the Yangtze river economic belt in Jiangsu section as an example, utilizes the Landsat series of remote sensing images from 1999 to 2000, 2009 to 2010, and 2019 to 2020, and applies the RSEI model to quantitatively analyze the spatial and temporal variation of the regional ecological environment in the research area from 1999 to 2020. Besides, in order to quantitatively explore the impact of human activities (urbanization) on the ecological environment under disparate intensities in different area, the time and space information indicators including the artificial impervious surface (IS) and the nighttime light (NTL) are imported, and the proportion of IS area and the mean value of IS area NTL radiance in each district are defined. Research results indicated that:① From 1999 to 2020, the ecological environment quality of the urbanization areas in the districts along the Yangtze river in Jiangsu Province and their surrounding areas has declined significantly. Moreover, the IS regional areas for different districts in the research region increased rapidly from 2000 to 2009, which led to regional eco-environment quality declined significantly. Simultaneously, the regional eco-environment quality improved slowly from 2010 to 2020 due to increased greening area in partial urbanization region. ② The IS area proportion of each district in the research region has a significantly negative correlation with its RSEI average. However, the negative correlation between the mean value of the NTL radiance in the IS region and the mean value of its RSEI were relatively weakened, especially in the districts where the IS area proportion accounted for more than 0.3. In these districts, the interaction coupling relationship between urbanization and ecological environment became more complex. As a result, their detailed function model needs to be further investigated.

Key words: urbanization, ecological environment, remote sensing ecology index, Yangtze River Economic Belt, impervious surface, nighttime light

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