摘要
利用1995年森林资源分布图和2005年IKONOS遥感影像构建了土地利用GIS数据库,通过利用分形理论对官司河流域的各景观要素进行分析,结果表明:①耕地和林业用地面积占绝对优势,是该区域景观的基质,土地利用类型变化较大,林地、道路、水域的面积不断扩大;②建筑用地、水域和耕地的多样性指数最大,优势度也较为明显,而各类林业用地多样性指数和优势度均较小;③林地和耕地的分维数大于其它景观类型,而稳定性指数小于其它类型,说明这两种景观类型分布较为复杂和不规则,稳定性较差,建筑用地和水域的分维值较低,接近于"1",说明这两种类型分布规模较小,斑块较为规则;④从分维数的动态变化来看,除道路和水域这两种景观类型减少外,其它景观类型都增加,表明人类对这几种类型的利用程度更加复杂化。
By application of forest distribution map and remote sensing image in 2005(IKONOS),land usage database was established.Each landscape elements of Guansi river watershed were analyzed by fractal theory.The results showed: ①the cultivated land and forestry land area accounted for absolute advantage,which were the matrix of landscape in this area.The land usage type changed greatly,while the area of forest land,roads,the waters expanded unceasingly.②The diversity index of construction land,water and land was the largest,and the advantage degree was also more obvious,while the diversity index and advantage degree of each forest land were also smaller.③The fractal dimension of forest land and land was greater than other landscape types,while the stability index was smaller.That illustrated the two landscape type distribution was more complicated and irregular,stability was poorer.The fractal dimension of building lands and waters was low,close to 1,which showed the two types of distribution on a smaller scale,plaques more rules.④According to the dynamic change of fractal dimension,besides the road and water area,other landscape types were increased,which showed that human beings to this several types of utilization degree more complicated.
出处
《物探化探计算技术》
CAS
CSCD
2013年第2期175-179,119,共5页
Computing Techniques For Geophysical and Geochemical Exploration
基金
"十二五"农村领域国家科技计划课题(2011BAD38B0404)
高等学校博士学科点专项科研基金(20095122110003)
关键词
官司河流域
“3S”技术
景观结构
分形
Guansi river watershed
'3S' technology
landscape structure
fractal
