以三峡库区(万州地区)为例,研究了三峡库区万州区景观总体格局以及各景观类型格局的演变规律;利用万州区1995、2000、2006、2009年的TM影像,在3S技术支持下,结合重庆市生态环境特征,利用计算机自动分类和目视判读的方法,将影像数据矢量化,并对多样性指数、均匀度指数、优势度指数、破碎度指数、分维数指数5类景观格局指数进行了详细的分析;结果表明:研究区在14年间景观类型主体没有显著变化,仍然以耕地和林地为主,但耕地优势度总体趋于减少,林地得以回升;景观受到人为干扰因素增强,斑块形状趋于规整;景观整体稳定系数增强,景观向着多样化、均匀化发展。
Taking Three Gorges Reservoir area (Wanzhou District) as an example, this paper studies the evolution law of overall landscape pattern of Wanzhou District and each landscape pattern type, makes image data vector by using TM images of Wanzhou District in 1995,2000,2006 and 2009, based on 3S technology and the characteristics of eco-environment of Chongqing and by using computer automatic classification and visual identification method, and analyzes, in detail, five index, dominance index, fragmentation index and indexes of landscape pattern such as diversity index, evenness fractal index. The results indicate that the subject of landscape pattern in the studied area does not have obvious change in 14 years, that the area of Wanzhou District is mainly still occupied by cultivated land and forestland, however, cultivated land is decreasing and forestland is rising, that the factors'of human intervention to landscape are increasing and patch shape is structured, and that overall landscape stabihty coefficient is enhanced and the landscape develops toward diversity and evenness.