Spatiotemporal characteristics and influential factors of coupling coordination degree of urbanization and ecological environment in the Huaihe River ecological economic belt.

and 0.295–0.634–0600–0.592 respectively Coupling coordination Stages of development of the coupling coordination degree between urbanization and eco-environment From 2005 to 2020, the coupling coordination degree between urbanization and eco-environment in the Huaihe Ecological Economic Belt showed an increasing trend (Table 5 ), with the C value rising from 0.36 to 0.94, the T value rising from 0.16 to 0.99, the coupling coordination value rising from 0.25 to 0.91, D values as a whole change from moderate imbalance to advanced coordination, while the relative development of the two system layers in the study area changed from 0.36 to 1.00, signifying that the study area has changed from urbanization lag to balanced development.

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The values of the urbanization development level and the coupling coordination have been greater than 0, but From 2005 to 2020, the Moran’s index of the urbanisation development level and the coupling coordination declined each year, from 0.355 to 0.170 to 0.140 and − 0.116 respectively, representing a positive trend in the correlation between urbanisation development level and spatial correlation, but the correlation has also been weakening, while the spatial correlation of the coupling coordination has changed from a positive to a negative one.

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