【摘要】 <正> 坡耕地水土流失主要由暴雨引起,认识降雨在坡耕地上的产流和入渗规律,对于水土流失规律研究、水土保持措施的制定具有重要的意义。土壤含水率是影响产流和入渗的重要因素之一,为了寻求它们之间的定量关系,我们采用人工模拟降雨装置,以同一种降雨强度,在我所管道梁试验场选取坡度均一、土壤理化性质相同的无植被坡耕地小区,进行了不同土壤含水率对产流、入渗影响的试验,现将试验结果介绍如下:更多还原

【Abstract】 Soil nioisture is one of the important factors affecting runoff and infiltration. Based on tests with simulated rainfalls on light silty loam of cropland on slopes, it has been found that the relation between moisture content W and time of beginning of runoff T is expressed by: T=693.025 W~1.000, the relation between moisture content W and coefficient of runoff K is expressed by:K=3.180 W+ 2 057, the relation between moisture content W and initial loss h is expressed by :h=106 ,7l4W~1.904, and the relation between moisture content W and mean rate of infiltration P is expressed by : P=1 .524-0.049 W. Studies have also been made on the effect of soil moisture on the process of infiltration and forming of runoff更多还原