DOI: 10.1007/s11069-020-04448-0
论文题名: Combined hazard of typhoon-generated meteorological tsunamis and storm surges along the coast of Japan
作者: Heidarzadeh M. ; Rabinovich A.B.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 106, 期: 2 起始页码: 1639
结束页码: 1672
语种: 英语
中文关键词: Harbour oscillations
; Meteotsunami
; Seiches
; Statistics
; Storm surge
; Tide gauge records
; Tsunami currents
; Typhoon
英文关键词: coastal zone
; hazard assessment
; storm surge
; tide gauge
; tsunami
; typhoon
; wave height
; Japan
; Pacific Coast [Japan]
英文摘要: Two hazardous typhoons, Lionrock (August 2016) and Jebi (September 2018), destructively affected the coast of Japan and produced extreme sea level variations. The results of field surveys in the impacted regions showed that multiple deaths and extensive floods were caused by the combined effect of low-frequency sea level raise (storm surges) and intensive high-frequency (HF) tsunami-like waves (meteotsunamis). The data from ten tide gauges for the 2016 event and eight gauges for the 2018 event were used to examine the properties of the observed sea levels, to estimate the relative contribution of the two sea level components and to evaluate their statistical characteristics (maximum wave heights, amplitudes and periods of individual components, etc.). For the 2016 event, we found that the surge heights were from 12 to 35 cm and that the mean contribution of surges into the total observed sea level heights was ~ 39%; the meteotsunami amplitudes were from 22 to 92 cm, and they contributed 61% of the total height. For the 2018 event, storm surges were significantly stronger, from 46 to 170 cm, while HF amplitudes were from 38 to 130 cm; their relative inputs were 67% and 33%, respectively. Combined, they formed total flood heights of up to 120 cm (2016 event) and 288 cm (2018 event). Previously, the contribution of storm seiches (meteotsunamis) in coastal floods had been underestimated, but results of the present study demonstrate that they can play the principal role. What is even more important, they produce devastating currents: according to our estimates, current speeds were up to 3 knots (1.5 m/s) during the Lionrock event and more than 5 knots (2.6 m/s) during Jebi; these strong currents appear to be the main reason for the resulting damage of coastal infrastructure. The most important characteristic of the recorded meteotsunamis is their trough-to-crest maximum height. During the 2016 event, these heights at three stations were > 1 m: 171 cm at Erimo, 109 cm at Hachijojima and 102 cm at Ayukawa. The 2018 event was stronger; maximum meteotsunami wave heights were 257 cm at Gobo, 138 cm at Kushimoto, 137 cm at Kumano and 128 cm at Murotomisaki. The 2018 Gobo height of 257 cm is much larger than historical non-seismic seiche maxima for the Pacific coast of Japan (140–169 cm) estimated by Nakano and Unoki (1962) for the period of 1930–1956. © 2020, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169072
Appears in Collections: 气候变化与战略
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作者单位: Department of Civil and Environmental Engineering, Brunel University London, Uxbridge, UB8 3PH, United Kingdom; Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, BC V8L 4B2, Canada; Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, 117993, Russian Federation
Recommended Citation:
Heidarzadeh M.,Rabinovich A.B.. Combined hazard of typhoon-generated meteorological tsunamis and storm surges along the coast of Japan[J]. Natural Hazards,2021-01-01,106(2)