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首页> 外文会议>World dredging congress and exhibition >LONG-TERM MODELING OF THE IMPACT OF DREDGING STRATEGIES ON MORPHO- AND HYDRODYNAMIC DEVELOPMENTS IN THE WESTERN SCHELDT
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LONG-TERM MODELING OF THE IMPACT OF DREDGING STRATEGIES ON MORPHO- AND HYDRODYNAMIC DEVELOPMENTS IN THE WESTERN SCHELDT

机译：疏SC策略对西部谢尔德地区形态和水力动态影响的长期模型

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The natural morphological developments of the Western Scheldt and the impact of human activities on these developments are investigated using a process-based morphological model called FINEL2d. The historical period of 1965-2002 is simulated in a TO scenario including all the human activities that have taken place in that period. Besides this TO scenario two extreme scenarios are modeled for the same period. The T1 scenario is carried out without any human activities from 1965 onwards. In the T2 scenario regular dredging of the navigational channel takes place, but the dredged material is not distributed back into the Western Scheldt like in the TO scenario. In this way insight is obtained into how human activities have influenced and will influence the tide in and the morphology of the Western Scheldt. By modeling these different sediment strategies it is concluded that the applied strategy has had a large impact on the morphology of the estuary and tide during this period. The channels have deepened and the tidal flats have increased in the 1965-2002 in the model, because of which the hypsometry of the Western Scheldt has probably has become steeper over the last decades. The results also show significant effects on the propagation of the tide in the estuary. Due to the actual human activities over the past decades the tidal range in the estuary has increased by about 0.4m in Antwerp and accelerated the propagation of the tide with approximately 20 minutes. This corresponds to the observed phase shift in Antwerp over the past decades. The extreme scenario in which all dredged material was removed from the estuary shows that the process of increasing tide levels in the estuary may continue in case that the human activities are intensified.
机译：使用称为FINEL2d的基于过程的形态学模型，研究了West Scheldt的自然形态发展以及人类活动对这些发展的影响。在TO情景中模拟了1965-2002年的历史时期，包括该时期发生的所有人类活动。除了此TO场景外，还针对同一时期对两个极端场景进行了建模。从1965年开始，在没有任何人类活动的情况下进行了T1情景。在T2情景中，会定期进行导航通道的疏dr，但是疏TO的物料不会像TO情景中那样分配回Western Scheldt。通过这种方式，我们可以洞悉人类活动如何影响并将影响Western Scheldt的潮汐和形态。通过对这些不同的沉积物策略进行建模，可以得出结论，在此期间，所应用的策略对河口和潮汐的形态产生了很大的影响。在1965-2002年的模型中，航道加深了，滩涂增加了，因此，在过去的几十年中，Western Scheldt的测压曲线可能变得越来越陡峭。结果还显示出对潮汐在河口传播的显着影响。由于过去几十年来的实际人类活动，河口的潮汐范围在安特卫普增加了约0.4m，并在大约20分钟的时间内加速了潮汐的传播。这与过去几十年来在安特卫普观察到的相移相对应。从河口清除所有挖出物的极端情况表明，如果人类活动加剧，河口潮汐水平上升的过程可能会继续。

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