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Study on coupling coordination degree of urbanization and ecological environment in Chengdu-Chongqing economic circle from 2002 to 2018

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Abstract

Under the western development strategy of China, the urbanization process of Chengdu-Chongqing economic circle (CCEC) develops rapidly, but also brings a series of ecological and environmental problems. Understanding the coordination mechanism that links urbanization and the ecological environment (UE) is crucial for promoting environmental conservation and sustainable development. Using the comprehensive nighttime light index (CNLI) and the remote sensing ecological index (RSEI), this study objectively evaluated the urbanization level and ecological environment quality and used the modified coupling coordination degree model to quantify the coupling coordination of UE for the two indexes. The results show that (1) the urbanization level of each city in the CCEC presents an increasing trend year by year, showing a circle distribution pattern with the twin cities as the core. (2) The overall eco-environmental quality presents a fluctuating upward trend, and in recent years, it has been significantly improved, showing a spatial pattern of higher in the surrounding areas and lower in the middle. (3) The overall coupling coordination of the study area is develo**, and the upward trend is larger in recent years. The spatial distribution is centered on the “double nucleus,” and the distribution of circles is characterized by a gradual decrease from the inside to the outside; the coupling coordination of cities in the northwest and east of the CCEC is decreasing, and that of cities in the northeast and southwest is increasing. During the study period, a total of 5 cities have reached the level of coordinated development, while most other cities are in the stage of uncoordinated development, mainly due to the lagging development of urbanization. CCEC still needs to strengthen the construction of urbanization, in order to improve the degree of coordination between economic development and ecological environment.

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Funding

This research was funded by National Natural Science Foundation of China (grant number 42271405) and Natural Science Foundation of Sichuan Province (grant number 2023NSFSC0248).

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Authors and Affiliations

  1. Surveying and Map** Geographic Information Center, Sichuan Institute of Geological Survey, Chengdu, 610072, China

    Shuai Wang, Miao Tian & Qibing Ding

  2. College of Earth Sciences, Chengdu University of Technology, Chengdu, 610059, China

    Huaiyong Shao & Shiyu **a

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  1. Shuai Wang
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  2. Miao Tian
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  3. Qibing Ding
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  4. Huaiyong Shao
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Contributions

Shuai Wang: conceptualization, formal analysis, visualization, and writing—original draft. Huaiyong Shao: conceptualization,methodology, and writing—review and editing. Miao Tian: writing—review and editing. Qibing Ding: writing—review and editing. Shiyu **a: writing—review and editing.

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Correspondence to Huaiyong Shao.

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Wang, S., Tian, M., Ding, Q. et al. Study on coupling coordination degree of urbanization and ecological environment in Chengdu-Chongqing economic circle from 2002 to 2018. Environ Sci Pollut Res 31, 3134–3151 (2024). https://doi.org/10.1007/s11356-023-30988-6

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