NUMERICAL INVESTIGATIONS OF LOCALLY CONCENTRATED DAMAGES ON SEISHO COAST DUE TO TYPHOON T0709
NUMERICAL INVESTIGATIONS OF LOCALLY CONCENTRATED DAMAGES ON SEISHO COAST DUE TO TYPHOON T0709
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台风T0709对西正海岸局部集中损害的数值调查
DOI：
10.1142/9789814287951_0018
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Shinji Sato
中科院分区：
文献类型：
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作者：
Y. Tajima;Shinji Sato
本文探讨了T0709台风在西正海岸造成局部集中破坏的物理机制。首先进行了实地调查，以捕捉风暴期间沿岸的水动力分布。测得的水位线高程沿海岸沿着呈现一定的周期性波动，其峰值对应于受损最严重的区域。然后分析了位于最严重受损区域以东约7km处的平冢实验站记录的地表水位和流速的时间序列，发现自由和有界长波都随着T0709接近受损区域而增长，短波高度增加。最后通过数值分析探讨了水动力局部集中的物理机制，发现近岸流和长波波动对这一现象有重要影响。
This paper explores physical mechanisms of locally concentrated damages observed on Seisho coast due to typhoon T0709. Field survey was first conducted to capture alongshore distributions of hydrodynamic forces during the storm. The measured water mark elevations showed certain periodic undulation along the coast and their peak corresponded to the most severely damaged area. Time-series of surface water levels and velocities recorded at Hiratsuka Experiment Station, located around 7km east from the most damaged area , were then analyzed and it was found that both free and bounded long waves grew as T0709 approached to the damaged site and short wave heights increased. Numerical analysis was finally carried out to investigate physical mechanisms of local concentration of hydrodynamic forces and it was found that near-shore current and long wave fluctuations appeared to have significant influence on this phenomenon.