Journal of Ecology and Rural Environment ›› 2023, Vol. 39 ›› Issue (11): 1386-1398.doi: 10.19741/j.issn.1673-4831.2023.0131

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The Coupling Coordination Degree of Ecological Environment and Urbanization in Ecological Civilization Demonstration Area Based on Remote Sensing Ecological Index and Compounded Night Light Index: A Case Study of the Yangtze River Delta

YAO Guo-hui, LI Hai-dong, WU Jing, WANG Nan, LIU Chen-wei   

  1. Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
  • Received:2023-02-27 Published:2023-11-21

Abstract: The ecological civilization demonstration area includes the national ecological civilization construction demonstration area and the "Lucid Waters and Lush Mountains Are Invaluable Assets (as Two Mountains)" practice and innovation base, which focuses on the developing of an ecological economic system with industrial ecology and ecological industrialization as the mainstay, explores the path and model of realization of ecological product value, especially in rapidly urbanized areas. Taking 77 ecological civilization construction demonstration areas and 22 "Two Mountains" practice and innovation bases in the Yangtze River Delta (YRD) as the objects, the author utilized land use products, VIIRS, and MODIS data to construct remote sensing ecological index (RSEI) and compounded night light index (CNLI) to represent the ecological environment quality and urbanization level, respectively, and explored the level and spatiotemporal variability of ecological civilization demonstration construction in the YRD by using spatial superposition analysis and coupling coordination degree model. The results show as follow:(1) The distribution of ecological civilization demonstration area in the YRD is uneven, among which, the distribution of ecological civilization construction demonstration areas is more concentrated and dominated by plain terrain, while the "Two Mountains" practice and innovation bases are more dispersed and dominated by mountainous terrain. (2) The ecological land area of the ecological civilization demonstration area exceeds 70% and has a good environment foundation, among which the RSEI index of the "Two Mountains" practice and innovation base is higher than that of the ecological civilization construction demonstration area, and the ecological environment quality is superior, but it is more fragile. (3) The CNLI and its growth rate of the ecological civilization construction demonstration areas are higher than those of the "Two Mountains" practice and innovation bases, which has a higher urbanization level and development speed. (4) From 2017 to 2021, the coupling coordination degree between ecological environment quality and urbanization level of the ecological civilization construction demonstration areas and "Two Mountains" practice and innovation base showed an increasing trend, with an average increase of 10.55% and 8.90%, respectively, indicating that the ecological civilization construction has achieved certain results, with the highest coupling coordination degree at the junction of Jiangsu and Zhejiang Provinces.

Key words: ecological civilization construction, remote sensing ecological index, compounded night light index, coupling coordination degree, Yangtze River Delta

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