坡面侵蚀垂直分布特征动态变化过程初步研究

Study on the Changeable Process of Soil Erosion Spatial Distribution Characteristics on the Slope Surface

采用稀土元素（REE）示踪法对坡面侵蚀垂直分布特征动态变化过程进行了初步研究。结果表明．坡面侵蚀垂直分布特征在次降雨过程呈动态变化趋势．尽管在产流过程中相对侵蚀量的变化趋势基本相似．但比值差异很大，这主要取决于坡面径流的强度。此外、次降雨侵蚀产沙的垂直分布特征与侵蚀过程中产沙的分布特征差异亦很大，建议应加强侵蚀产沙过程的研究。

By the rare earth elernent (REE )tracing method , the changeable process ofsoilerosion spatial distribution characteristics on the slopesurface wasresearched. The resultshowed that the soil erosionspatial distributioncharacteristicsin a rainfall process ischangeable with the time the value of related erosion yielddependonthe runoff intensity , and the spatialdistribution charac teristic of soil erosion in a rainfallis different with therainfall processso the authorsuggested that we shouldpay muchattention to the processofsoil erosion and sediment yield .