Field Survey of Damage Due to February 2008 High Wave on East Coast of Toyama Prefecture

Kawasaki, Koji; Mizutani, Norimi; Iwata, Koichiro; Kobayashi, Tomonao; Yuhi, Masatoshi; Saitoh, Toshiaki; Kitano, Toshikazu; SUMI, Hirokazu; Mase, Hajime; Yasuda, Tomohiro

doi:10.2208/proce1989.55.151

Cited by 4 publications

(1 citation statement)

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“…The seawall along the Shonan Coast in the Odawara region facing the Pacific Ocean was damaged by 14.2 s swells in 2007. Moreover, severe damage to property and inhabitants in the Ashizaki district of Nyuzen town on the Shimoniikawa Coast was caused by long-period swells with high wave heights in 2008 (Kawasaki et al, 2008). Thus, it is necessary to take countermeasures urgently to reduce the severe damage caused by long-period swells.…”

Section: Introductionmentioning

confidence: 99%

Mechanism and Countermeasures of Wave Overtopping for Long-Period Swell in Complex Bathymetry

Kashima

Hirayama²

2012

Int. Conf. Coastal. Eng.

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Recently, coastal disasters due to long-period swells induced by heavy storms and catastrophic typhoons have increased at Japanese coasts and harbors. Long-period swells are more susceptible to the bottom bathymetry of the offshore deep water region and their wave heights locally increase due to the concentration of wave energy caused by the complex bottom bathymetry in the relatively shallow water region. In addition, the wave overtopping rate may increase due to the long waves in front of the seawall induced by the long-period swells. However, the spatial relationship between wave characteristics and wave overtopping discharges in the complex bathymetry are not well known owing to a lack of detailed measurements. In this study, model experiments were conducted by using a large basin to investigate the spatial characteristics of wave transformation and wave overtopping focusing on the heavy wave overtopping damages caused by the arrivals of long-period swells at the Shimoniikawa Coast in 2008. Effective countermeasures against wave overtopping are also discussed based on their characteristics.

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Section: Introductionmentioning

confidence: 99%