岔巴沟流域次降雨水沙耦合关系空间变异研究

Study on the Coupling Relationship between the Runoff and Sediment in Chabagou Watershed

在全面分析岔巴沟流域地貌形态、沟网及降雨空间分布等因素基础上,结合野外实地观测资料,对该流域次降雨水沙耦合关系及其空间变异性进行了研究.结果表明,岔巴沟流域次降雨输沙模数与洪峰流量模数及径流深具有较强的相关性,这种相关性耦合关系具有明显的空间变异性,流域面积、地貌形态等下垫面因子是形成该空间变异性的主要原因.

Based on analyzing the topographic character, the spatial distribution of gully and rainfall and the data from field observation, the coupling relationship between the runoff and sediment, and its spatial difference are studied. The results show that the modulus of sediment transport, the modulus of maximum flood discharge and the runoff depth take on great positive relativity and spatial difference that can be influenced by the watershed area, topographic character and so on.