拟定和建立土壤侵蚀的雨量标准 ,旨在区分发生和不发生土壤侵蚀的降雨事件 ,从而可以减少计算降雨侵蚀力的工作量 ,进而在此环节上 ,为提高土壤侵蚀预报精度提供可能和条件。选取位于皖南山区的歙县华源河流域内所设置的 3个径流小区的实测资料为分析样本 ,以此推求出其侵蚀性降雨雨量标准依次为 13 6、14 6和14 7mm。按此标准 ,可剔除降雨场次 5 0 %以上 ,而漏选的土壤流失量占总侵蚀量的比例在 3%以内。 To develop and establish a standard of rainfall for soil erosion aimed at distinguishing rainfall events from occurring and not occurring soil erosion, thereby reducing the workload of calculating rainfall erosivity and thereby providing possibilities and conditions for improving soil erosion prediction accuracy. The data of three runoff plots located in Huayuan River of Yixian County in the southern mountainous area of ​​Anhui Province were selected to analyze the samples, and the erosive rainfalls were 13 6, 14 6 and 14 7 mm. According to this standard, more than 50% of the rainfall events can be excluded, while the proportion of soil erosion to total erosion within 3% of the total.