Selecting SPOT5 remote sensing images in June 2008 and July 2008 of Chongqing Liangtanhe River Basin (in Shajiaba District)and Gaoianhe River Basin, and using GIS and RS technology, the distribution of the landscape types of the two basins is obtained. By dint of FRAGSTATS which is a kind of software for landscape analysis, the landscape pattern indexes for each type of the landscape patterns are calculated. And then seven indicators are selected which are the patch number, patch area, mean patch area, perimeter, fractal dimension,dominance, and fragmentation for the analysis of the differences of the landscape patterns between the two basins. Analysis results show that:the landscapes of forest land, shrubs, and grass are the most stable landscape types of the two basins. The largest differences are in the landscape types of water body, paddy field, and construction land. In The Liangtanhe River basin, there are less paddy field and water bodies,where land for construction is a large plate and distributes in cluster. In the Gaotanhe River basin, there are more paddy fields and less water bodies, and construction sites are mainly in the two counties of Dianjiang and Liangping. In the Liangtanhe River basin, heavy disturbance is a landscape characteristic, and the landscape matrix is dry land, and there are large paddy fields, and water bodies are turned into construction lands, which have destructed the original distribufon of landscape and ecological environment with a dramatic increase in the trend. In the Gaotanhe basin, less human disturbance is a landscape characteristic and the landscape matrix are dry land and paddy field. The paddy fields in the county and its surrounding area are turned into construction lands, and a small amount of water bodies and dry land are developed for agricultural and economic activities.%选取重庆市梁滩河流域(沙坪坝段)、高滩河流域2008年6月、2008年7月的SPOT5遥感影像,运用GIS和RS技术,获得其景观类型分布图,选取各景观类型的斑块教、斑块面积、平均斑块面积、周长、分维数、优势度、破碎度7个指标,通过FRAGSTATS景观分析软件计算出各类型的景观格局指数,进行两流域的景观格局对比分析.结果表明:两流域的林地、灌丛、草坡景观类型为两流域最稳定的景观类型.主要区别在于水体、水田、建设用地3种景观类型,梁滩河水田、水体较少,建设用地呈大板块、组团式分布;高滩河水田很多,水体较少,建设用地主要分布于垫江、梁平两县城境内.梁滩河流域其景观呈现出人为干扰强度较大的特征,旱地为景观基质,大面积水田、水体转化为建设用地,破坏了原有的景观类型分布和生态环境,并有剧烈加剧的趋势;高滩河流域其景观呈现出人为干扰强度相对较小的特征,旱地和水田为其景观基质,景观类型转换主要发生在县城及周边,其主要的转换方向为水田等景观向建设用地景观的转换.
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