Abstract

In this paper, the dynamic urban built-up changes of Yinchuan city based on Landsat 5 in 2001, 2007, 2011 and Landsat 8 images in 2015 is described. Information such as urban built-up area and the situation of surface cover are analyzed. The results show that with the development of the city, the area of urban built-up area and urban vegetation area are increasing every year, and the water system in the city increases at first and then decreases slightly. In addition, a proportion of 4% of the expansion of Yinchuan urban built-up area are indicated in this paper, which is mainly from vegetation, followed by a small number of villages and waters. Finally, this paper analyzes that the economic development, population growth and other factors play an important role in promoting the urban change of Yinchuan city.

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