Interaction mechanism between ecological environment and land use and cover change in valley-basin megapolis: a case study of Lanzhou

The process of land use and cover change is one of the main approach of the interaction between urbanization and ecological environment, which is especially notable in valley-basin. In this article, we analyze the mechanism of how valley-basin ecological environment affects the land use in urbanized area, through the introduction of urbanized land proportion index. We can draw conclusion of the article. Firstly, there are great interaction between ecological environment and LUCC in valley-basin area, and LUCC affects the ecological environment more directly there. Secondly, the LUCC in valley basin is deeply affected by the social and economic factors, but the effect is intimately related to the ecological environment yet. Thirdly, minor change of urban land use will result in large change of urban land cover, and eventually result in the change of ecological environment nearby.