对于不适宜布设径流池的坡度较大的山区和丘陵地区,当降雨强度大或融雪水量较大,土壤流失监测点径流筒里的水集满而不能及时进行分流处理时,部分粒径较小的颗粒物质便随水流出径流筒,最终使得所测样方土壤流失量比实际流失量要小。采用颗粒分析法还原土壤流失量,能较合理地确定监测点土壤流失的实际情况。 For mountainous areas and hilly areas with large runoff which are not suitable for laying runoff ponds, when the rainfall intensity is large or the amount of snowmelt is large, and the water in the runoff monitoring point of soil erosion is full and can not be diverted in time, Of the particulate matter will flow out of the runoff tube, eventually making the measured sample side soil loss than the actual loss to be small. Using particle analysis method to reduce the amount of soil loss can determine the actual situation of soil loss more reasonably.