Temporal-spatial Changes Analysis of Land Use Structure in Changsha City Based on Information Entropy
分析了1996至2008年长沙土地利用结构的时间与空间变化，发现信息熵和均衡度波动上升、优势度下降，表明系统从有序向无序转变，且城市熵值高于县域。
The temporal and spatial variations of land use structure in Changsha City from 1996 to 2008 are analyzed based on information entropy.The results are as follows: in terms of time,the information entropy,equilibrium degree is gradually rising trend of fluctuations,but the dominance degree is decreasing year by year,which reflects the land use system of Changsha City is from elementary to advanced disordered orderly transformation,while the structure is weakening,and the equilibrium degree is increasing during the study period.In terms of space,there is a large space to improve the information entropy,the urban information entropy is larger than the jurisdiction of counties of Changsha City.From the correlation analysis,conclusions could be drawn as follows: Firstly,the reduction of cultivated land,garden plots,forest land,unused land,water area and water conservancy facilities,and the increase of residential,industrial and mining land,traffic land directly made the change of the information entropy.Secondly,the economic development of Changsha City,especially the rapid development of the secondary industries,was the basic cause of the increase of information entropy.Thirdly,the increase of the total population and the raising of urbanization level were closely related with the increase of land use structure information entropy.