工程措施所形成的各类人工地貌具有地表完全裸露、人为因素影响大等特征。在人工模拟降雨的基础上 ,对铁路施工期形成的各类人为地貌和原地面的土壤侵蚀产沙、产流规律以及影响因素进行了研究。结果表明 ,降雨历时和累积径流量、累积产沙量以及含沙率的关系非常密切 ,同时植被覆盖度以及土壤质地是影响土壤侵蚀产流产沙的主要因素 All kinds of artificial landforms formed by engineering measures have features such as completely exposed surface and large human factors. On the basis of simulated rainfall, various types of man-made landforms and soil erosion and sediment yield, runoff rules and influencing factors on the original ground during railway construction were studied. The results showed that the relationship between rainfall duration and cumulative runoff, cumulative sediment yield and sediment yield was very close. Vegetation coverage and soil texture were the main factors affecting the runoff and sediment yield of soil erosion