Grey Associative Analysis of Regional Urbanization and Eco-environment Coupling in China
Based on the panel and serial statistical data, the main factors of regional urbanization and eco-environment coupling, temporal-spatial distribution of the coupling degrees have been researched. The results show: 1) Through grey associative degree analysis, it can be seen that the urban population transfer, economic growth, social service function and level are the main momentums for urbanization to affect eco-environment. Furthermore, the paper selects 16 items of urbanization and 10 items of eco-environment to reveal the coupling mechanism of regional urbanization and eco-environment. 2) The distribution of the coupling degrees basically conforms to the discrepant rule that the coupling degrees are lower in the eastern belt and the western belt, and higher in the middle with an inverse "U" shape. According to the coupling degree distributions and the stages of regional urbanization and economic development, the 31 provinces can be divided into four types, i.e., that are harmony, amelioration, confliction and low-level coupling, but the conflictive type is dominant, reaching 50% . 3) There exist significant phases and undulatory characteristics for the temporal evolvement of urbanization and eco-environment coupling, in which the former stage takes on inverse "U" shape and the latter stage rising curve shape.