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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Vegetated filter effects on sedimentological connectivity of agricultural catchments in erosion modelling: A review
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Vegetated filter effects on sedimentological connectivity of agricultural catchments in erosion modelling: A review

机译：植被过滤效果对农业集水区沉积物的沉积效果侵蚀建模：综述

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The sedimentological connectivity of agricultural catchments may be affected by anthropogenic structures (land management practices) established to reduce sediment exportation from agricultural plots to water streams. Distributed erosion models may in theory provide information about where and how these structures should be installed in catchments to reduce sediment exportation. The interaction between sediment exportation and land management practices is very complex from both theoretical and experimental points of view. Vegetated filters are a widely used land management practice. They interact with water flow, change turbulence conditions, and ultimately affect sediment transport and deposition processes. Experimental results have shown that the efficiency of sediment trapping in vegetated filters is influenced by flow characteristics, sediment size, and vegetation type, as well as by the slope and width of the filter in the streamwise direction. At the catchment scale, the spatial organisation of management practices is crucial for the global sedimentological connectivity. Present-day erosion models propose different approaches to simulate the influence of management practices on soil loss and sediment export for agricultural catchments. Some of them use the Sediment Delivery Ratio (SDR) or P-factor to describe sediment transport from source to sink areas. Others, such as in the TRAVA and VSFMOD, rely on process-based descriptions involving changes in roughness and infiltrability along flow paths to study the effect of management practices. From the literature review conducted herein, we identified the lack of an approach of intermediate complexity, that would be more physically relevant than SDR and P-factor approaches, but simpler and easier to spatialise than TRAVA and VSFMOD-type models.
机译：农业流域的沉积学连通性可能受到建立的人为结构（土地管理实践）的影响，以减少农业地块到水流的沉积物输出。分布式侵蚀模型可能理论上可以提供关于在集水区内的地点和如何安装这些结构的信息，以降低沉积物输出。沉积物输出和土地管理实践之间的相互作用是从理论和实验的观点中非常复杂。植被过滤器是一种广泛使用的土地管理实践。它们与水流相互作用，改变湍流条件，并最终影响沉积物运输和沉积过程。实验结果表明，植被过滤器沉积物诱捕的效率受流动特性，沉积物尺寸和植被类型的影响，以及滤波器在流动方向上的斜率和宽度。在集水区规模，管理实践的空间组织对于全球沉积物连接至关重要。现今的侵蚀模型提出了不同方法来模拟管理实践对农业集水区土壤损失和泥泥泥土出口影响的影响。其中一些使用沉积物交付比（SDR）或P因子来描述从源到水槽区域的沉积物运输。其他，例如在Trava和VSFMod中，依赖于基于过程的描述，涉及沿着流动路径的粗糙度和脱落性的变化，以研究管理实践的影响。从本文进行的文献综述中，我们确定了中间复杂性的方法，这比SDR和P系数方法更加有关，但比TRAVA和VSFMOD型模型更简单和更容易。

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