摘要
以滇池环湖带作为研究对象,应用GIS技术与分形理论,通过解译4期高清影像将土地利用类型进行划分,并对各类土地利用类型图斑进行分形维数分析。分析结果表明:4期土地利用类型分布具有明显的分形结构;城镇与道路具有比较高的结构稳定性,说明在人类活动干预下,城镇与道路土地斑块形态规整化改善,草地、水田、旱地、有林地、灌木林地和湿地结构稳定性较低,说明这几类土地处于不断运动及改造状态;1957-2009年,土地类型总体上表现为分形维数增加(趋于1.5),稳定度下降,2009-2015年分形维数降低(趋离1.5),稳定度增加,这是滇池环湖带土地利用在前期无序开发、后期有序保护而形成的结果;环湖湿地的大面积建设在影响环湖带各类土地结构与形状的同时也可能有利于维护区域土地利用格局的稳定性。
The H-D images of land usage types were interpreted by GIS technology and fractal theory at lakeshore of Dianchi Lake, and the land usage types were analyzed by Fractal dimension. The re- suits indicated that, an obvious fractal structure was shown on 4 period of land usage type ; Town and road with high structural stability indicated that the shape of land patches of town and road have been improved regularly. The structural stability of grassland, paddy field, dry land, forest land, shrubland and wetland was weak. From 1957 to 2009, the fractal dimension of land usage type increased to 1.5 with decreased stability. After then, the fractal dimension decreased with increased stability. Above all, this phenomena resulted from the land development disorderly in earlier stage and protected or- derly in later period around the Dianchi Lake. The impact of various types of land structure and shape was shown by the the construction of the wetland, and at the same time, the stability of regional land use pattern might be beneficial to maintain.
作者
谭志卫
白晓华
李杰
TAN Zhiwei BAI Xiaohua LI Jie(Yunnan Institute of Environmental Science,650034, Kunming, PRC Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed ,650034, Kunming, PRC)
出处
《江西科学》
2017年第3期372-381,454,共11页
Jiangxi Science
基金
国家水体污染控制与治理科技重大专项(2013ZX07102-006-02)
关键词
高清影像
分形理论
分维数
稳定性指数
H-D imag e
fractal theory
fractal dimension
stability index
