径流小区集流桶含沙量全深剖面采样器的研制与试验

径流小区是土壤侵蚀监测的一个重要方法,对其集流桶中含沙量的测定则是侵蚀监测准确与否的关键。在以北京土石山区为代表的粗砂多砂区,传统的搅拌方法无法测得准确的含沙量。因此研制了集流桶含沙量全深剖面采样器,意于以一种简单的采样技术代替传统方法来提高含沙量的测量精度。本研究的目的在于通过实地的系统试验验证采样器的适用性。结果证明采样器的测量精度相对于传统方法有了很大的改进,同时采集泥沙的机械组成符合实际侵蚀状况。

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.