基于GIS与信息熵的长春市城市用地演变特征研究

Evolution characteristics of urban land use in Changchun based on GIS and information entropy

选取长春市2009-2018年城市用地作为研究对象,采用土地利用动态度、土地利用结构信息熵与均衡度,从城市用地规模和结构等方面入手,分析长春市2009-2018年城市用地演变特征。结果表明:(1)与省内其他城市相比,长春市城市用地总量及年均增长率均显著偏高。(2)长春市城市用地呈缓慢增长趋势,用地类型除其他土地面积略有下降,各类用地面积均有所增加,其中工业用地增速最快。(3)信息熵结果显示长春市土地利用类型结构逐渐趋于稳定。(4)公园与绿地面积偏小,其占比有待提高。(5)长春市各区人均用地面积差异较大,特别是公园与绿地,除南关区符合国家标准以外,其他各区人均面积均偏小。

In this paper,Changchun urban land from 2009 to 2018 was selected as the research object.From the aspects of urban land use scale and urban land structure,the land use dynamic degree,information entropy and equilibrium degree of land use structure were used to analyze the evolution characteristics of urban land in Changchun from 2009 to 2018.The results showed that:①Compared with other cities in the province,the total amount of urban land use and the average annual growth rate of Changchun were significantly higher.②The urban land use in Changchun City showed a slow growth trend.Except for other land types,the area of all kinds of land use increased,among which the industrial land grew the fastest.③The result of information entropy showed that the land use type structure in Changchun gradually tends to be stable.④The area of parks and green space was too small,its proportion needs to be improved.⑤The per capita land use area of Changchun was quite different,especially for parks and green space.Except Nanguan District,which met the national standard,the per capita area of parks and green space of other districts was relatively small.