中文摘要：

通过实地观测、实验分析及数据处理，对松花坝水源区迤者小流域的径流和泥沙进行了初步研究，通过探究径流和泥沙变化特征来揭示该区水土流失的原因，以采用合理的方法治理该区水体流失。结果表明：松花坝水源区迤者小流域5～10月的降雨量最大，降雨是产生径流和泥沙的主要因素，但不是唯一因素，降雨、径流、泥沙之间存在着正相关的关系，如8月4日降雨深度达到39．4mm，径流总量达到88．12m^3，产沙量达到150．68kg。又如9月19日降雨深度只有0．2mm，径流总量只有0．22m^3，产沙量也只有0．01kg。降雨具有周期性和随机性，而径流和泥沙的日变化规律和降雨历时、采样时间及土地利用类型有很大的关系。我们只能分析径流和泥沙的大致变化趋势，而无具体的变化规律。

英文摘要：

Based on field observations, experimental analysis and data processing, a preliminary study of runoff and sediment have been done for the Yizhe small watershed in Songhuaba cachment area. Looking through the mud and sand runoff and changes to reveal the identity of the reasons for soil erosion,the article tries to find a reasonable way to control water erosion in the area. The results show that the rainfall was maximum from May to October, and the rainfall was the main factor for generating runoff and sediment, but not the on- ly one. There are positive correlation existing among rainfall, runoff and sediment, such as the rain depth was 39.4mm on August 4,runoff volume reached 88.12 m^3,sediment yield was 150.68kg. And on September 19 the depth of rainfall was only 0.2mm,runoff was only 0.22 m^3, sediment yield was only 0.01kg. Because the rainfall was periodic and random,the diurnal variations of runoff and sediment have a great relationship with rainfall duration,sampling time and land use types. We can only analyze changes of runoff and sediment for the general trend instead of specific changes.