ANALYSIS OF TOPOGRAPHIC CHANGES IN 2014-2016 PERIOD ON SEISHO COAST
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- UDA Takaaki
- （一財）土木研究センターなぎさ総合研究所 兼 日本大学理工学部海洋建築工学科
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- IGARASHI Tatsuyuki
- （一財）土木研究センター河川・海岸研究部
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- OHTANI Yasuro
- （一財）土木研究センター河川・海岸研究部
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- GOMI Hisaaki
- 三洋テクノマリン（株）
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- TATEISHI Kengo
- 三洋テクノマリン（株）
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- SHIGEHARA Toshihiro
- （一財）土木研究センター河川・海岸研究部
Bibliographic Information
- Other Title
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- 西湘海岸における2014～2016年の海浜地形変化
- セイショウ カイガン ニ オケル 2014~2016ネン ノ カイヒン チケイ ヘンカ
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Abstract
Narrow Multi-Beam survey data collected in the area offshore of the Seisho coast in 2014 and 2016 were analyzed. The analysis was carried out, focusing the typical accumulation and erosion pattern which is caused when longshore sand transport was blocked by the offshore reef or groins, and the characteristics that the change in seabed topography decreases seaward and ceases near the depth of closure, instead of simple comparison of the obtained NMB data. Six areas, such as the Sakawa River mouth, Odawara Parking area, the Ninomiya coast where beach nourishment using coarse sediment, and others, were selected, and longshore sand transport and the depth of closure at several locations were evaluated. As a result, it was found that westward longshore sand transport dominated during the observation period, and longshore sand transport was evaluated to be 2.5×104 m3/yr at the Kuzu River mouth.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 74 (2), I_677-I_682, 2018
Japan Society of Civil Engineers