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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25433

Title: Observations and conditions for occurrence of dangerous coastal waves
Authors: Cheng-Han Tsai;Ming-Yang Su;Shih-Jen Huang
Contributors: NTOU:Department of Marine Environmental Informatics
國立臺灣海洋大學:海洋環境資訊系
Keywords: Dangerous;large;coastal waves;Group waves;Overtopping;Wave height correlation;Run length
Date: 2004-04
Issue Date: 2011-10-20T08:23:13Z
Publisher: Ocean Engineering
Abstract: abstract:People fishing on breakwaters or rocky shores are sometimes swept into the sea by dangerous, large, coastal waves, resulting in drowning incidents in Taiwan. These waves are locally called mad-dog waves. Wave measurements and video recordings were carried out to investigate these events. These events were found to be associated with typhoons or winter (northeasterly) monsoon. The sites of these incidents were at waters deeper than 10 m with rather steep bottom slope (about 1:5, or higher). Among the five incidents investigated, two had high wave groupness features in offshore waves. In one of other three, the mean groupness characteristics were not strong, but the incident was associated with a group of three waves in increasing heights with nearly equal periods. Interviews with victims and examinations of video footage suggested that the occurrence of mad-dog wave events were results of wave overtopping. A set of possible conditions for the occurrence of these events is proposed. Since exact timing and locations of overtopping are difficult to predict, such waves are called mad-dog waves.
Relation: 31(5-6), pp.745–760
URI: http://ntour.ntou.edu.tw/handle/987654321/25433
Appears in Collections:[海洋環境資訊系] 期刊論文

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