论文部分内容阅读
以桥沟小流域为研究对象,利用该流域不同地貌部位的野外径流场及沟道水文站网观测资料,计算了不同场次降水的泥沙输移比,较为系统地研究了影响桥沟流域次降水泥沙输移比的水文要素。结果表明:土壤前期含水量、流域的降水过程特征、洪峰流量、径流量、水流含沙量是影响次降水泥沙输移比的主要水文要素;提出了表示降水、径流、泥沙对泥沙输移比影响的表征参数,即降水峰现系数、径流侵蚀力和泥沙相对容重。
Taking the Qiaogou small watershed as the research object, this paper calculated the sediment transport ratio of different stages of precipitation by using the field runoff field and the channel hydrological station network observation data of different geomorphologic parts in this basin, Hydrological Factors for Sediment Delivery Ratio of Precipitation. The results showed that: the early soil moisture content, the precipitation process characteristics, flood peak flow, runoff and water flow are the main hydrological factors affecting the sediment transport ratio of secondary sediment; The characterization parameters of the effect of transport ratio, namely precipitation peak current coefficient, runoff erosivity and sediment relative bulk density.