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To date, traditional evaluation frameworks mainly include the indicator system construction based on statistical data, which seldom utilize the geo-spatiotemporal datasets. Hence, this study aimed to evaluate the CCD change trend of the Yangtze River Delta (YRD) and explore the relationship between the CCD, economy, and eco-environment on the county scale. In this study, YRD was selected as the study area to evaluate its level of CCD at different periods, and then the nighttime difference index (NTDI) and eco-environmental comprehensive evaluation index (ECEI) were calculated to represent the difference in the development of the regional economy and the eco-environmental quality (EEQ). The CCD between the two systems was then calculated and analyzed using global, local, and Geary\u2019s C spatial autocorrelation indicators, in addition to change trend methods. The main findings showed that: (1) During the period 2000\u20132020, the economic system in YRD showed a continuously upward trend (0.0487 a\u22121), with average NTDI values of 0.2308, 0.2964, 0.3223, 0.3971, and 0.4239, respectively. In spatial terms, the economy system showed a distribution of \u201chigh in the east and low in the west\u201d. (2) YRD\u2019s EEQ indicated a gradual upward trend (from 0.3590 in 2000 to 0.3970 in 2020), with a change trend value of 0.0020 a\u22121. Spatially, the regions with high ECEI were mainly located in southwestern counties. (3) In the past 20 years, the CCD between economic and eco-environment systems showed an increased change trend, with a change trend value of 0.0302 a\u22121. The average CCD values for the five periods were 0.3992, 0.4745, 0.4633, 0.5012, and 0.5369. The overall level of CCD improved from \u201cmoderate incoordination\u201d to \u201clow coordination\u201d. (4) Both NTDI and ECEI indexes have a positive effect on the improvement of regional CCD. However, the contribution of NTDI is a little higher than that of ECEI.<\/jats:p>","DOI":"10.3390\/systems11100500","type":"journal-article","created":{"date-parts":[[2023,9,29]],"date-time":"2023-09-29T05:48:13Z","timestamp":1695966493000},"page":"500","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Evaluation of Coupling Coordination Degree between Economy and Eco-Environment Systems in the Yangtze River Delta from 2000 to 2020"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1996-6281","authenticated-orcid":false,"given":"Jianwan","family":"Ji","sequence":"first","affiliation":[{"name":"School of Geography Science and Geomatics Engineering, Suzhou University of Science and Technology, Suzhou 215009, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Litao","family":"Wang","sequence":"additional","affiliation":[{"name":"Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4133-005X","authenticated-orcid":false,"given":"Maorong","family":"Xie","sequence":"additional","affiliation":[{"name":"Suzhou Branch of Jiangsu Province Hydrology and Water Resources Investigation Bureau, Suzhou 215011, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wen","family":"Lv","sequence":"additional","affiliation":[{"name":"Suzhou Branch of Jiangsu Province Hydrology and Water Resources Investigation Bureau, Suzhou 215011, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cheng","family":"Yu","sequence":"additional","affiliation":[{"name":"School of Geography Science and Geomatics Engineering, Suzhou University of Science and Technology, Suzhou 215009, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenliang","family":"Liu","sequence":"additional","affiliation":[{"name":"Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4844-7832","authenticated-orcid":false,"given":"Eshetu","family":"Shifaw","sequence":"additional","affiliation":[{"name":"School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, China"},{"name":"Department of Geography and Environmental Studies, Wollo University, Dessie P.O. 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