【摘要】 将滇西北漾弓江流域土地利用类型作为景观要素,应用多时相遥感影像,结合地形、地面参考数据,建立影像分类模型.综合地理信息系统与地统计技术,获取流域1986～2000年间的景观空间格局变化的转置矩阵,从而定量分析其变化.结论显示1986～1996年间区域环境退化,1996年后的景观变化证实该区自从实行退耕还林以来植被覆盖率有所提高,同时人为用地快速增多.1996年丽江大地震给流域环境带来较大变化.更多还原

【Abstract】 The Yanggong River is a littler anabranch of upper reaches of the Changjiang River, a representative area in northwest Yunnan Province with complicated terrain and relief conditions, furthermore, there are different nationality and culture background between the upper basin and the lower. After the earthquake happened in February, 1996 and the Lijiang old town was included in the United Nations "world cultural heritage" list in next year, the floating population quantity was increased quickly, which leads to intensification of the contradict between human beings and the limited land resources, the paper explored to study the holistic environmental changes on the watershed area scale. Multitemporal remote sensing imageries associated with referenced data such as terrain data and ground survey data were applied to construct the expert classification model based on the knowledge engineer, using the geography information system (GIS) and geo-statistics technology to obtain the conversion matrix of the landscape changing in the drainage area from year 1986 to 2000 for the quantitative analysis on the evolution of spatial pattern. The results suggested that during 1986-1996, the environmental condition of the watershed is deteriorated; but from 1996 to 2000, the landscape changing verified the increase of the forest cover rate due to the action "return the grain plots to forestry" from then on. However, at the same time, the area of the culture land use type is increased at a high speed.更多还原