Abstract:

Taking 35 cities in the Yellow River Basin as the research object， the index systems of industrial greening and ecological environment greening are constructed respectively. Entropy weight method is used to calculate the comprehensive indexes of the two systems. Furthermore， based on the coupling coordination degree model and spatial autocorrelation method， the spatio-temporal characteristics and spatial agglomeration of the coupling coordination degree of the two systems are analyzed from 2009 to 2018. The results show that： （1） In terms of comprehensive level， the comprehensive indexes of industrial greening and ecological environment greening in the upper， middle and lower reaches of the Yellow River Basin show an upward trend and are generally similar. The greening level of eco-environment is higher than that of industry in the upper reaches， but it is lower than the greening level of industry in the middle and lower reaches. （2） In terms of spatiotemporal dimension， there is an upward trend in the coupling coordination degree of the industrial greening and ecological environment greening in the Yellow River Basin. The upper， middle and lower reaches in the Yellow River Basin are characterized by "high-low-high" development， and their development stability is different. （3） In terms of spatial agglomeration， there is a significant positive correlation between industrial greening and ecological environment greening in the Yellow River Basin， indicating that there is obvious aggregation in space. High-high aggregation is mainly concentrated in the upper reaches， and low-low aggregation extends from the middle reaches to the middle and lower reaches.

Key words: Yellow River Basin, industrial greening, ecological environment greening, coupling coordination degree