Results from measurements are presented that were collected during a full tidal cycle in the Ems estuary, involving two landers and an anchored research vessel. The conditions were characterized by very weak winds, no wave effects, and low river run-off, so that the state was close to tide-only. We find that the lateral (i.e., cross-slope) transport of water and suspended particulate matter (SPM) much of the time shows a vertically layered structure, which is however subject to sudden transitions. Moreover, even on the small spatial scale of these measurements (i.e., within a distance of 200 m), a strong lateral variability is observed in the circulation patterns. We analyze its dynamics by means of dimensionless parameters. In addition, near-bottom peaks in SPM concentration are observed, notably during early flood. However, these episodic events have little effect on the overall transport of SPM, which involves the whole water column: the measurements show a high vertically integrated SPM signal during late ebb, resulting in an ebb-dominance in the transport at this position in the tidal channel.

给出的测量结果是在Ems河口的整个潮汐周期中收集的，涉及两个着陆器和一艘锚定的研究船。这些条件的特征是极弱的风，没有波浪效应和低的河流径流，因此该州接近潮汐。我们发现，水和悬浮颗粒物（SPM）的横向（即横坡）传输大部分时间都显示出垂直分层的结构，但是该结构可能会突然过渡。而且，即使在这些测量的较小空间尺度上（即，在200 m的距离内），在循环模式中也观察到了强烈的横向变化。我们通过无量纲参数分析其动力学。此外，观察到SPM浓度接近底峰，特别是在早期洪水期间。然而，