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首页> 外文期刊>Estuarine Coastal and Shelf Science >Intratidal and spatial variability over a slope in the Ems estuary: Robust along-channel SPM transport versus episodic events
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Intratidal and spatial variability over a slope in the Ems estuary: Robust along-channel SPM transport versus episodic events

机译：EMS河口的坡度的底图和空间变异：沿着通道的强大的SPM运输与集中事件

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摘要

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.
机译：介绍了测量结果，该结果是在EMS河口的完整潮汐周期内收集的，涉及两个着陆器和锚定的研究容器。这种情况的特征在于风弱，无波效应，低河流越野，因此状态接近潮流。我们发现水和悬浮的颗粒物（SPM）的横向（即横坡）运输大部分时间显示垂直分层结构，但是受到突然过渡的影响。此外，即使在这些测量的小空间尺度上（即，在200米的距离内），在循环模式中观察到强的横向变异性。我们通过无量纲参数分析其动态。此外，特别是在早期洪水期间观察到SPM浓度的近底峰。然而，这些发作事件对SPM的整体运输影响不大，这涉及整个水柱：测量在迟到的EBB期间显示出高垂直集成的SPM信号，导致在潮汐中的这种位置的运输中的eBB优势渠道。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2020年第30期|106902.1-106902.12|共12页
  • 作者

    Schulz Kirstin; Burchard Hans; Mohrholz Volker; Holtermann Peter; Schuttelaars Henk M.; Becker Marius; Maushake Christian; Gerkema Theo;

  • 作者单位

    Helmholtz Ctr Polar & Marine Res Alfred Wegener Inst Bremerhaven Germany|Univ Utrecht NIOZ Netherlands Inst Sea Res Dept Estuarine & Delta Syst POB 140 NL-4400 AC Yerseke Netherlands;

    Leibniz Inst Baltic Sea Res Warnemunde Seestr 15 D-18119 Rostock Germany;

    Leibniz Inst Baltic Sea Res Warnemunde Seestr 15 D-18119 Rostock Germany;

    Leibniz Inst Baltic Sea Res Warnemunde Seestr 15 D-18119 Rostock Germany;

    Delft Univ Technol Delft Inst Appl Math Van Mourik Broekmanweg 6 NL-2628 XE Delft Netherlands;

    Univ Kiel Inst Geosci Otto Hahn Pl 1 D-24118 Kiel Germany;

    BAW Fed Waterways Engn & Res Inst Hamburg Germany;

    Univ Utrecht NIOZ Netherlands Inst Sea Res Dept Estuarine & Delta Syst POB 140 NL-4400 AC Yerseke Netherlands;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Lateral circulation; SPM transport; Ems estuary; EDoM18;

    机译：横向循环;SPM运输;EMS河口;EDOM18;

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