【摘要】 依据航片判读、森林资源调查资料和水文数据，利用流域自身对比法，得出森林变化对河川径流泥沙的定量关系。文中还阐明本方法的技术关键——消除降雨量不同对水沙的影响．该方法具有适合我国国情、费小效宏、精度较高、简捷易行等优点，值得推广提倡。更多还原

【Abstract】 A usefull method of how to get a quantitive relationship between forest changeand flow·sediment of river is discussed in this paper。According to airphoto discern,investigation of forest resource and hydrological data,watershed contrast with itself is efficient,andthe crux is to eliminate the effect of variation of annual rainfall on water and sediment.Thewav is fit for our countrv’s conditions with lower cost and rnore efficiency and worth spread-ing.更多还原