摘要
利用窟野河王道恒塔站以上流域２０多次径流含沙量大于３００ｋｇ／ｍ３的降雨径流泥沙资料，初步分析了流域降雨空间分布及前期影响雨量对流域产沙的影响，并建立了流域降雨侵蚀产沙过程的水沙传递关系。研究结果表明：降雨空间分布及前期影响雨量对水沙传递关系的影响是显著的，此项研究对提高流域降雨侵蚀产沙预测预报精度和可靠性具有重要的意义。
The effect of rainfall spatial distribution and antecedent precipitation on sediment yield of watershed has been analysed by using more than twenty rainfall runoff sediment yield events, the sediment concentration in runoff is more than 300kg/m3. The transference relationships from runoff discharge to sediment concentration in the processes of rainfall runoff sediment yield in watershed has been built. The research results show that the effect of rainfall spatial distribution and antecedent precipitation on the transference relationship from runoff discharge to sediment discharge is remarkable. It is important for rainfall erosion sediment yield prediction.
关键词
降雨空间分布
前期影响雨量
水沙传递关系
流域产沙
降雨侵蚀
rainfall spatial distribution
antecedent precipitation
transference relationship from runoff discharge to sediment discharge
sediment yield in watershed
