Physical impact on the reclamation area resulting from offshore dredging at the Changhwa coast, Taiwan
✍ Scribed by Tai-Wen Hsu; Hsien-Kuo Chang
- Book ID
- 104159446
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 672 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0029-8018
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✦ Synopsis
The physical impact of offshore dredging on the reclamation area at the Changhwa coast, Taiwan, is investigated using a three-dimensional movable-bed model test. A distorted modeling law consisting of maintaining similarity of the equilibrium beach profile between the model and prototype is proposed. The geometric distortion was verified through a series of preliminary experiments conducted in a wave flume. Experimental results show that the distorted modeling is able to reproduce the beach-face slope in nature. An appropriate long-term morphological time-scale was determined based on a comparison of model longshore littoral transport rates and equivalent prototype values. Seabed topographical changes before and after offshore dredging are evaluated in model tests. A suitable countermeasure to prevent beach erosion from wave attack along the reclamation area is suggested from the experimental results.