Replication dataset for “Migrating subaqueous dunes capture clay flocs”

This is the data underlying the publication <strong>“Migrating subaqueous dunes capture clay flocs”. </strong>It consists of the data as described in the publication, being the floc characteristis from the floc cam, grainsize distributions, bed profiles from the StreamPro, Kolmogorov calculations, the GoPro images from the experiments, and the lab sheet of the experiments. For more information I refer to the read-me file.<br>The abstract of the research in which this data is used reads:"Recent research highlights the abundance of floccule (flocs) in rivers, formed by the aggregation of clay particles with organic matter. These flocs affect the transport and eventual fate of clay. Flocs exhibit distinct behaviour from their unflocculated sedimentary counterparts: they can deform and break, and have higher settling velocities, which may in turn cause flocs to have the potential to deposit and possibly interact with the riverbed. Systematic experiments in a laboratory flume were conducted. Flocs showed a saltating (bouncing) behaviour, and were incorporated in the sediment bed as single flocs, clusters, or strings, via deposition and burial in the lee of a dune. The dune geometry was negligibly impacted by the presence of flocs. This study is the first to highlight interactions between flocs and bedforms. In natural systems, the burial of flocculated clay particles can affect contaminant spreading, aquatic ecology, the interpretation of deposition patterns, and clay transport."

本数据集支撑发表论文《迁移型水下沙丘捕获黏土絮团（Migrating subaqueous dunes capture clay flocs）》，包含该论文中描述的全部实验相关数据：来自絮团摄像头（floc cam）的絮团特性数据、粒度分布数据、StreamPro采集的河床剖面数据、柯尔莫哥洛夫（Kolmogorov）计算结果、实验获取的GoPro影像，以及实验记录表。更多详细信息请参阅自述文件（read-me file）。
本研究使用该数据集完成的研究摘要如下：近期研究表明，河流中存在大量黏土絮团（clay flocs），它们由黏土颗粒与有机质聚集形成。此类絮团会影响黏土的输运过程及其最终归宿。与未絮凝的沉积颗粒相比，絮团具备独特的行为特性：可发生变形与破碎，且沉降速度更快，这使得絮团具备沉积下来并可能与河床发生相互作用的潜力。本研究在实验室水槽中开展了系统实验。实验结果显示，絮团呈现跃移（弹跳）行为，并通过在沙丘背风坡沉积与埋藏，以单个絮团、絮团簇或絮串的形式被纳入沉积物床体中。絮团的存在对沙丘几何形态的影响可忽略不计。本研究首次揭示了絮团与床形地貌之间的相互作用。在自然生态系统中，絮凝黏土颗粒的埋藏过程会对污染物扩散、水生生态、沉积模式解译以及黏土输运产生影响。