Design and testing of the depth profile sediment sampler for runoff plots

Runoff plots play an important role in soil erosion monitoring,and the measurement of sediment concentration in collecting tanks is a key step.However in some rocky and earthy regions such as Beijing mountain region,traditional measurement method can not get the precise value of sediment concentration.So a new type of sediment sampler was designed to be adopted as a more simple and exact way instead of the traditional.The purpose of this study was to test the applicability of the sediment sampler by a systemic experiment on a natural runoff plot.The results indicated that the sediment concentration measured by using the sediment sampler was far more precise than that by the traditional method.And the particle size distribution of the sediment taken by the sediment sampler fit in with that of real in the collecting tank.