EXPERIMENTAL STUDIES ON THE EFFECT OF THE DREDGING ON CHANG-HWA RECLAMATION AREA, TAIWAN

EXPERIMENTAL STUDIES ON THE EFFECT OF THE DREDGING ON CHANG-HWA RECLAMATION AREA, TAIWAN
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DOI：
10.9753/icce.v24
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发表时间：
1995
期刊：
--
影响因子：
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通讯作者：
Tai Wen Hsu;Hsien-Kuo Chang
Tai Wen Hsu;Hsien-Kuo Chang
中科院分区：
其他
文献类型：
--
作者：
Tai Wen Hsu;Hsien-Kuo Chang

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采用活动床模型试验，对台湾昌化围垦区近海疏浚的效果进行了研究。提出了一种实用的动床模型设计比例关系式。它的优点是为泥沙模型的选择提供了更大的灵活性。基于波浪陡度和可动度两个参数的相似性，得到了模型试验中波浪条件的尺度关系。海底变化的时间尺度由海岸输沙速率决定。实验结果表明，所提出的尺度关系能较好地再现自然界中海滩的变化。在模型试验中预测了疏浚前后的地形变化。特别注意研究了由于近海疏浚造成的海床结构侵蚀和增积的位置。
The effects of offshore dredging at Chang-Hwa reclamation area, Taiwan, are investigated by using movable bed model tests. A practical scale relation for the design of movable bed model is presented. It takes the advantage to give more flexibility for the selection of model sediment. The scale relations of wave conditions in the model test are obtained based on the similitude of two parameters: wave steepness and mobility number. Time scale of sea bottom changes is determined by longshore sediment transport rate. Experimental results show that the proposed scale relations are able to reproduce beach changes in nature. Topographical changes before and after dredging are predicted in model tests. Special attention was made to study the location of erosion and accretion of sea bed configuration owing to offshore dredging.