应用卫星遥感技术结合地面样地调查和流域多年水文资料分析的方法，对长江上游４个典型流域森林水文效益进行研究与评价，弄清各流域下垫面要素的性质和结构、流域水文参数变化规律，以及流域森林水源涵养林的涵水机理和评价方法，提出长江上游水源林的经营措施，为“九·五”长防林建设研究提供参考资料。 Using satellite remote sensing technology combined with ground sample surveys and multi-year hydrological data analysis, the hydrological benefits of the four typical basins in the upper reaches of the Yangtze River were studied and evaluated. The nature and structure of underlying elements of the watersheds, the changes of hydrological parameters Regularity and the mechanism and evaluation method of water conservation of forest water conservation forests in the basin, and put forward management measures of water source forests in the upper reaches of the Yangtze River so as to provide references for the research on the “Nine-Five” long-term prevention of forest construction.