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Open AccessArticle

The Characteristics of Coastal Highway Wave Attack and Nearshore Morphology: Provincial Highway No. 9, Taiwan

Tainan Hydraulics Laboratory, National Cheng Kung University, Tainan 709, Taiwan
Department of Hydraulic and Ocean Engineering, National Cheng Kung University, Tainan 701, Taiwan
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Tainan 701, Taiwan
National Science and Technology Center for Disaster Reduction, New Taipei City 23143, Taiwan
Harbor and Marine Technology Center, Taichung 435058, Taiwan
Author to whom correspondence should be addressed.
Water 2020, 12(11), 3274;
Received: 1 September 2020 / Revised: 25 October 2020 / Accepted: 19 November 2020 / Published: 21 November 2020
(This article belongs to the Special Issue Wave and Tide Modelling in Coastal and Ocean Hydrodynamics)
This study explores coastal hazard characteristics along Provincial Highway No. 9 (hereafter the Provincial Highway) in Taiwan. Numerical simulation was conducted to analyze wave attacks and medium-to-long-term coastal morphological change along the Provincial Highway and identify areas of high hazard potential. Hydrodynamic and morphological change numerical models were used to simulate various meteorological scenarios in the research site; specifically, far-field, medium-field, and near-field simulations were performed. Subsequently, the simulated results were employed to analyze hazard characteristics and determine the potential for hazard along the Provincial Highway. According to the analysis of hazard characteristics, the high potential of wave attacks was revealed in the following sections of the highway: 440K+000-441K+000, areas near 424K+500, and 396K+000-396K+500, and the highest potential for erosion was shown in the areas near 418K+000 and 397K+500. Finally, these areas with a high potential for wave attacks and erosion were marked to create a map of hazard potential for the provincial highway, and thus provide insights into future construction works or hazard-prevention operations. View Full-Text
Keywords: Provincial Highway No. 9; wave attack; morphological change Provincial Highway No. 9; wave attack; morphological change
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Lu, W.-S.; Wu, H.-L.; Hu, K.-C.; Chen, Y.-L.; Chen, W.-B.; Hsiao, S.-C.; Hsiao, Y.; Chen, C.-Y.; Tsai, L.-H. The Characteristics of Coastal Highway Wave Attack and Nearshore Morphology: Provincial Highway No. 9, Taiwan. Water 2020, 12, 3274.

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