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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Characterization of wood-laden flows in rivers
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Characterization of wood-laden flows in rivers

机译：河流中木材流动的特征

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Inorganic sediment is not the only solid-fraction component of river flows; flows may also carry significant amounts of large organic material (i.e. large wood), but the characteristics of these wood-laden flows (WLFs) are not well understood yet. With the aim to shed light on these relatively unexamined phenomena, we collected home videos showing natural flows with wood as the main solid component. Analyses of these videos as well as the watersheds and streams where the videos were recorded allowed us to define for the first time WLFs, describe the main characteristics of these flows and broaden the definition of wood transport regimes (adding a new regime called here hypercongested wood transport). According to our results, WLFs may occur repeatedly, in a large range of catchment sizes, generally in steep, highly confined single thread channels in mountain areas. WLFs are typically highly unsteady and the log motion is non-uniform, as described for other inorganic sediment-laden flows (e.g. debris flows). The conceptual integration of wood into our understanding of flow phenomena is illustrated by a novel classification defining the transition from clear water to hypercongested, wood and sediment-laden flows, according to the composition of the mixture (sediment, wood, and water). We define the relevant metrics for the quantification and modelling of WLFs, including an exhaustive discussion of different modelling approaches (i.e. Voellmy, Bingham and Manning) and provide a first attempt to simulate WLFs. We draw attention to WLF phenomena to encourage further field, theoretical, and experimental investigations that may contribute to a better understanding of flows in river basins, leading to more accurate predictions, and better hazard mitigation and management strategies. (c) 2019 John Wiley & Sons, Ltd.
机译：无机沉积物不是河流的唯一固体分量;流动还可携带大量大量的大量有机材料（即大木材），但是这些木材流动（WLF）的特征尚未得到很好的理解。旨在在这些相对未经审查的现象上揭示光线，我们收集了主页视频，显示用木材作为主要固体组成的自然流动。这些视频以及录制视频的流域和流允许我们为第一次定义WLF，描述这些流动的主要特征，并扩大木材运输制度的定义（在此添加新的政权，在此处拨打的新政权运输）。根据我们的结果，WLF可能反复发生，在大量的集水区大小，通常在山区的陡峭，高度限制的单线频道中。 WLF通常非常不稳定，并且对数运动是不均匀的，如对于其他无机沉积物的流（例如碎片流动）所述。根据混合物的组成我们为WLF的量化和建模定义了相关指标，包括对不同建模方法的详尽讨论（即Voellmy，Bingham和Manning），并提供第一次尝试模拟WLFS。我们提请注意WLF现象，以鼓励可能有助于更好地了解河流流域流动的理论和实验研究，从而导致更准确的预测，更好地危害缓解和管理策略。 （c）2019 John Wiley＆Sons，Ltd。

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