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Tsunami warning signs on the Enshu Coast of Japan

机译:日本恩州海岸的海啸预警信号

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摘要

The Enshu coast is located on the southern side of Honshu Island (Japan) (Fig. 1) (Chanson and Aoki 2004). The western part of the coast, so-called Omotehama, spans from Irago Cape to the mouth of the Tenryu River. The shoreline has been subjected to significant erosion, at a rate close to 1 m per year for past centuries. In recent years, some coastal protection works were built to slow the erosion rate. At the same time, the natural supplies of sediment materials at the Tenryu River mouth has drastically diminished because of dam construction along the Tenryu River and their reservoir sedimentation (Shinjo and Fujita 2004). The coastline has also had a history of rapid changes in shoreline. For example, a bifurcation of the Kuroshio current off the Enshu coast caused unusually high sea levels from mid September to late November 1999 that led to a serious shoreline retreat at Terasawa and Kojima of up to 20 m (Aoki 2002).
机译:恩州海岸位于日本本州岛的南侧(图1)(Chanson和Aoki 2004)。海岸的西部,所谓的Omotehama,从Irago Cape一直延伸到Tenryu河口。在过去的几个世纪中,海岸线遭受了严重的侵蚀,每年的侵蚀速度接近1 m。近年来,一些海岸保护工程被建造以减缓侵蚀速度。同时,由于天龙河沿岸的大坝建设和水库的泥沙淤积,天龙河河口的沉积物自然供应已大大减少(Shinjo and Fujita 2004)。海岸线还具有海岸线快速变化的历史。例如,1999年9月中旬至11月下旬,恩苏海岸沿岸的黑潮分叉导致异常高的海平面,导致寺泽和小岛的海岸线严重退缩,长达20 m(Aoki 2002)。

著录项

  • 来源
    《Shore and beach》 |2010年第1期|52-54|共3页
  • 作者

    Hubert Chanson;

  • 作者单位

    School of Civil Engineering, The University of Queensland, Brisbane QLD 4072, Australia;

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  • 正文语种 eng
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