关键词: 土地利用效益, 时空演化, 耦合协调关系, 兰西城市群

Abstract: By clarifying the connotation of social, economic, and eco-environmental benefits system of land use, we constructed the comprehensive evaluation index system of land use benefits in Lanzhou-Xining urban agglomeration. Based on entropy weight method and comprehensive index model, we analyzed the spatial variations of land use comprehensive benefits and social, economic, and eco-environmental benefits of Lanzhou-Xining urban agglomeration in 2005 and 2018, and evaluated the coupling coordination among principal components using coupling coordination degree model. The results showed that the social, economic, and eco-environmental benefits of land use in Lanzhou-Xining urban agglomeration displayed an upward trend. The spatial clustering characteristics of social and economic benefits were obvious, showing a distribution characteristic of “high in the east and low in the west”. The regional variations of eco-environmental benefits were relatively small, showing scattered distribution. The comprehensive benefits of land use showed an upward trend, with significant differences among counties. There was a spatial pattern of “high in the east and low in the west; high in the middle and low in the periphery”, while the central cities and prefecture-level cities were at a high level for a long time. The coupling and coordination among social, economic and ecological environmental benefits of land use tended to be improved as a whole, but only in the primary coordination stage at present. The coordination of Lanzhou and Xining provincial capital cities was better than other county towns. The coupling and coordination of land use benefits was mainly affected by the combination of three kinds of land use benefits. The lag of social benefit was the main reason restricting the promotion of coupling and coordination relationship of land use benefits, while the lag of eco-environmental benefit affected coupling and coordination of land use benefits.

Key words: land use benefit, spatio-temporal evolution, coupling coordination relationship, Lanzhou-Xining urban agglomeration.