三明市土地利用结构特征及其动态变化

Characteristic of Land Use Structure and Its Dynamic Change in Sanming City

采用三明市2000~2008年土地利用变更调查数据,选取土地利用动态度、土地利用变化贡献率、信息熵、集中化指数、多样化指数等指标,并通过一定方法和模型,对三明市土地利用结构特征及其动态变化进行了系统性分析。结果表明:农用地为三明市主要的土地利用类型;2000~2008年期间三明市土地利用综合动态度变化幅度较大,总体上呈现出上升趋势;土地利用结构信息熵和均衡度大致在增加,优势度在减小;2000~2008年期间,三明市土地利用方式朝着多样性方向发展,土地利用类型集中化程度降低。并根据三明市土地利用现状情况以及土地利用结构变化总体特征提出了一些促进土地资源可持续利用的建议。

Based on the detailed survey data of land use change from 2000 to 2008in Sanming City,this paper used many models and methods including dynamic degree,change contribution rate,information entropy,diversification and centrality degree to analyze the land use structure characteristics and its dynamic change.The results showed that the main land use type was agricultural land in Sanming City.During 2000-2008,the dynamic change of comprehensive land use was large showing a rising trend overall in Sanming city.The trend of land use structure information entropy and equilibrium are generally increasing.However,the degree of domination is decreasing.During 2000-2008,the land use pattern of Sanming City is developing in the direction of diversification.Meanwhile,the degree of land use type centralization is reduced.In accordance with the status quo and the general characteristics of land use structural change in Sanming City,this paper put forward some suggestions to promote the sustainable use of land resources.