柴达木盆地察汗乌苏绿洲土地覆盖分形研究  

Research on Fractal of Land Cover in Tsagan Us Oasis in Caidam Basin

作　　者：刘小丹[1] 张克斌[1] 曹永翔[1] 王海星[1] 

机构地区：[1]北京林业大学水土保持学院,水土保持与荒漠化防治教育部重点实验室,北京100083

出　　处：《水土保持研究》2009年第2期216-219,226,共5页Research of Soil and Water Conservation

基　　金：国家“十一五”科技支撑计划项目(2006BAD26B1001)

摘　　要：以RS和GIS为技术手段,利用国土资源卫星遥感数据,采用分形几何方法研究了柴达木盆地都兰县察汗乌苏绿洲土地覆盖类型分形情况,并对覆盖类型的分形特征差异等进行了分析。结果表明:研究区景观分离度最大的是林地,最小的是耕地,表明耕地分散程度最小,林地分散程度最大。区域景观破碎度最大的是林地,最小的是荒草地和河床与水利设施用地,说明林地被分割程度最大,荒草地和河床与水利设施用地最小。察汗乌苏绿洲分维数最大的是河床与水利设施用地,最小的是耕地,即河床与水利设施用地形状最不规则,受人为干扰最小,相对耕地形状最为规则,受人为干扰最大。With the application of RS and GIS techniques,as well as the CBERS data,fractal theory was employed to study circumstances of the fractal of oasis land cover in Tsagan Us Oasis in Dulan county in Caidam Basin,and the prominence of the difference of fragmentation distribution was analyzed.The results show that the biggest landscape separation index in the research area is the forest land and the smallest is farmland,which shows that the scattered degree of farmland is the least and the land use of farmland is the biggest.The biggest regional landscape fragmentation is the forest land,the smallest are waste-grassland and riverbed and water conservancy facilities land,which shows that the dividing degree of forest land is the biggest and the land use of waste-grassland and riverbed and water conservancy facilities land are the least.The biggest index of fractal dimensions is riverbed and water conservancy facilities land,the least is farmland.It means that the shape of riverbed and water conservancy facilities land is irregular,the human disturbance is the least,otherwise the shape of farm land is regular and human disturbance is the biggest.

关 键 词：柴达木盆地 察汗乌苏 绿洲 土地覆盖 分形理论 

分 类 号：X171.1[环境科学与工程—环境科学]