EROSION OF OHARAI-ISOHAMA COAST AND CAVING OF SEAWALL OF OHARAI AQUARIUM
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- UDA Takaaki
- 一般財団法人土木研究センターなぎさ総合研究室 兼日本大学理工学部海洋建築工学科
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- MATSU-URA Takeo
- 茨城県土木部河川課
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- OSAKI Yasuhiro
- 茨城県土木部河川課
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- OOKI Yasuhiro
- 一般財団法人土木研究センター
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- SAN-NAMI Toshiro
- 海岸研究室（有）
Bibliographic Information
- Other Title
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- 大洗磯浜海岸の侵食と大洗水族館の護岸空洞化
- オオアライ イソハマ カイガン ノ シンショク ト オオアライ スイゾクカン ノ ゴガン クウドウカ
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Abstract
A wide sandy beach with 130 m width extended in the 1960s in front of Oharai Aquarium located on the Oharai-isohama coast in Ibaraki Prefecture. Recently, the beach has been rapidly eroded with exposure of the seawall to waves. In October, 2015, caving of the seawall began, and the possibility of the failure of the seawall increased so that the seawall was forcibly broken down on November 18, 2015 to maintain the safty. In this study, the cause of the damage of the seawall was investigated, taking this seawall as an example. The long-term shoreline changes were investigated first using aerial photographs and satellite image of WorldView-2, and several field observations were carried out together with the investigation using aerial photographing by a Dorone.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 72 (2), I_643-I_648, 2016
Japan Society of Civil Engineers