摘要
以新疆塔里木河干流1990年、2000和2007年土地利用数据为例,应用分形理论来分析干旱区内陆河流域土地利用空间结构复杂性、稳定性以及动态变化性,通过建立距离河道不同的缓冲区范围来变化空间尺度,研究分形的空间尺度变化效应。结果表明,各种土地利用类型都具有空间分形特征,1990年土地利用分形维值由大到小的顺序是其它用地>牧草地>耕地>林地>居民及独立工矿用地>未利用地,2000年和2007年土地利用分形维值大小顺序为其它用地>牧草地>耕地>林地>未利用地>居民及独立工矿用地;通过空间结构稳定性指数分析得到天然植被(林地、牧草地等)的空间结构稳定性比较小。随着空间尺度的逐级扩大,各土地利用类型的分形特征依然存在,但分形维数减少,土地利用空间结构总体趋于简单状态下稳定。
Though the fractal theory, the complexity, stability and dynamic of the spatial structure of land use of the inland fiver basin in arid area was studied and the scale effect of fraetal was also studied with the establishment of different distances buffer to the river using the land use data of 1991, 2000 and 2007 of the main stream of the Trim River in Xinjiang. All land use types have fractal characteristics. The ranking of the value of fractal dimension of different land use types in 1990 was as follows ： the fractal dimension value of other land use 〉 that of grassland 〉 that of cultivated land 〉 that of forest land 〉 that of residential land and industrial and mining land 〉 that of unavailable land. It was alike in both 2000 and 2007 and almost similar with that in 1990 except the value of fractal dimension of unavailable land was bigger than that of residential land and industrial and mining land. The analyzing of stability index of spatial structure of varied land use tapes showed that natural vegetation （ forest land, grassland, etc） had low stability. As the enlargement of spatial scale, all land use types still possessed the characteristic of fraetal, but their value of fractal dimension was decreased and their spatial structure tended to stabilization of simple situation.
出处
《干旱区地理》
CSCD
北大核心
2009年第5期761-768,共8页
Arid Land Geography
基金
973项目(2009CB421301)
国家支撑项目(2007BAH12B03)
