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野外坡面内的植被与地形对侵蚀产沙影响,表现为共同改变某一坡面单元的上坡来水及其侵蚀动力,通常难以分离,呈现典型耦合作用特征。两者单独与侵蚀产沙的关系已较明确,但对侵蚀产沙的耦合影响则研究薄弱。在概述植被、地形各自对侵蚀产沙影响的基础上,从坡面和流域两个空间尺度,梳理了两者对侵蚀产沙耦合影响的相关成果,从理论认识、试验方法和监测技术三方面剖析了存在的主要问题,提出了三点推动该研究的具体对策,即:1引入反映多因素对侵蚀产沙耦合影响的预报模型参数;2搭建近自然坡面的植被镶嵌覆盖非均质试验小区;3开发侵蚀水动力参数高效量测技术等,以期为在侵蚀产沙过程机制与预报技术领域取得重大突破提供有益参考。
The effect of the vegetation and topography on the erosion and sediment in the field slope is manifested in that it is difficult to separate and show the characteristic of typical coupling effect by jointly changing the upwelling and erosion power of a slope unit. The relationship between the two and the erosion and sediment yield has been more clear, but the research on the coupling effect of erosion and sediment yield is weak. On the basis of summarizing the influence of vegetation and topography on the erosion and sediment yield, the paper summarizes the related effects of the two on the coupling of erosion and sediment yield from the two spatial scales of slope surface and river basin. From theoretical knowledge, test methods and monitoring techniques This paper analyzes the main problems and puts forward three specific measures to promote the research: 1. Introducing the forecasting model parameters that reflect the multi-factor impact on the coupling of erosion and sediment yield; 2 Setting up the vegetation inlaying coverage heterogeneity test Community; 3 to develop effective measures of erosion hydrodynamic parameters, with a view to provide a useful reference for major breakthroughs in the mechanism of erosion and sediment processes and forecast technology.