Investigation on the relationships between runoff and watershed sediment yield in rainfall erosion processes on the Loess Plate

摘要

Data of runoff and sediment yield in a watershed on the Loess Plateau are used to analyze the characteristics of sediment yield in a single rainfall erosion event. According to mechanics of rainfall sediment yield processes in the watershed. The relationships between runoff and sediment of the watershed have been analyzed. Rainfall even distribution coefficient, the antecedent affecting precipitation, token as the principal influential factors are introduced to build the transference relationship from runoff to sediment concentration in the process of rainfall erosion sediment yield. The relationships can be used to calculate and predict the sediment yield in a single rainfall event. It can also be used in planing soil and water loss control measures in watersheds on the Loess Plateau.