Evolution Characteristics of Urban Functional Land and Its Development Strategy in Oasis City: A Case of Zhangye City, the Hexi Corridors, China

The evolution of urban functional land is the spatial reflection of urban functional agglomeration and diffusion, it can profoundly reveal the internal characteristics of urban expansion. This paper applies spatial analysis tools of GIS to explore the spatial-temporal evolution characteristics of residential land, industrial land and public service land in Zhangye City since 1981 so as to provide effective development strategies for the sustainable development of oasis city. The results show that: 1) The urban residential land and public service facilities land have been gradually increasing, and there is a trend of spatial evolution that is spreading from the centre to periphery. However, industry and storage land increased first and decreased after, and it is from dispersing to agglomeration in spatial. The industry and storage land gathers in the industrial park. 2) Zhangye city should break through the development model of a single core and promote the compact development of urban space to form the full-featured urban spatial structure in the future.