大宁河流域坡度与坡向对土地利用/覆盖变化的影响

Influences of Slope and Aspect on Distribution and Change of Land Use and Cover in Daninghe River Watershed

通过解译同源不同时期卫星遥感影像数据,应用GIS对空间数据和属性数据的有效管理和分析,阐述了大宁河流域土地利用/覆盖随坡度和坡向的分布规律以及坡度和坡向的变化对土地利用/覆盖动态变化度和综合土地利用动态变化度的影响,分析了社会经济和政治因素对流域内土地利用/覆盖动态变化的正向和负向的驱动力作用。研究表明,大宁河流域内人类活动主要集中在坡度较低的区域,受社会因素的影响,人类活动正向较陡坡区域发展,陡坡耕地和极陡坡耕地在流域内分布过多,森林面积分布过少,从而对环境造成了负面影响。

On basis of the interpreting of remote sensing data and overlaying of vector data, the distribution and change law of land use and cover with change of slope and aspect and the influences of the slope and aspect on the single dynamic change degree and comprehensive dynamic change degree were discussed by applying the function of GIS to manage the spatial and attribution data. The positive and negative effects of social driving force on the land use and cover dynamical changes were analyzed in this paper. The research results indicated that human activity, which is extending to terribly steep slope slowly, mainly centralized in the lower area. In Daninghe River watershed, steep and terribly steep slope farming land distributed too much and forest land distributed too little, which have a negative effect on environment.