Abstract
As the main source of urban drinking, industrial and irrigation water, changes of urban lakes profoundly affect ecological environment of a region, such as industrial and agricultural development, people's living quality and so on. In this paper, remote sensing images are used to extract the water body of Hong Lake in flood season and dry season from 2013 to 2016, and analyze the characteristics of water changes in Hong Lake. Concepts as compactness index, shape fractal dimension and spatial gravity index in urban expansion field are introduced respectively, which are used for studying the speed and direction of Hong Lake change with lake area analysis, lake variation morphological analysis and lake spatial difference analysis. On the basis of this, the driving forces of lake change are studied by combining meteorological, hydrological and socio-economic factors, and the relationship between multiple factors and the area of Hong Lake are analyzed. Some factors show remarkable correlation with the area of Hong Lake. In conclusion, this paper provides important reference information for the ecological environment protection and sustainable utilization of water resources in Hong Lake, and has great application potential.
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