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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Benefits of design modifications to the Birkbeck bedload sampler illustrated by flash-floods in an ephemeral gravel-bed channel
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Benefits of design modifications to the Birkbeck bedload sampler illustrated by flash-floods in an ephemeral gravel-bed channel

机译：对Birkbeck床载采样器进行设计修改的好处以临时砾石床通道中的快速洪水为例

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摘要

The benefits of three simple modifications to the design of a Birkbeck bedload slot-sampling system that has been continuously operating in Nahal Eshtemoa, Israel, since the early 1990s are demonstrated. The modifications include the deployment of a removable slot cover which delays the accumulation of sediment, so allowing sampling at late stages of a flood and, in conjunction with other samplers, extending the period of sampling during a flood wave; inclusion of a slot the size of which is adjustable so that that the probability of sampling the largest clast sizes in transit as bedload can be increased post-installation, once knowledge is gained about the bedload grain-size distribution; and a sampler side-wall door that allows stratification and textural changes within the accumulated bedload to be identified, so promoting intelligent sampling of the deposit for grain-size determination. Results from seven flash-floods are presented and discussed, with recommendations for bedload monitoring, particularly in rivers where sediment flux is high and dynamic sediment records are inevitably short because of instrumental limitations. Copyright (c) 2006 John Wiley & Sons, Ltd.
机译：自1990年代初以来，对Birkbeck床载荷缝隙采样系统的设计进行了三项简单修改的​​好处就得到了证明，该系统已在以色列的Nahal Eshtemoa连续运行。修改包括部署可移动的缝隙盖，该缝隙盖可延迟沉积物的积聚，从而允许在洪水后期进行采样，并与其他采样器一起延长洪水波期间的采样时间;包括一个尺寸可调节的槽，以便一旦获得有关床载荷粒度分布的知识，安装后就可以增加在运输过程中取样最大的碎屑作为床载荷的可能性;以及一个采样器侧壁门，该门可以识别积聚的床体内的分层和质地变化，从而促进对矿床的智能采样，以确定粒度。提出并讨论了七次暴洪的结果，并提出了监测床荷的建议，特别是在泥沙通量较高且动态泥沙记录由于仪器的限制而不可避免地短的河流中。版权所有（c）2006 John Wiley＆Sons，Ltd.

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