Beach Erosion of Oharai-Isohama Coast Triggered by Decrease in Fluvial Sand Supply From Naka River

Nomoto, Chihaya; Osaki, Yasuhiro; Uda, Takaaki; Ohki, Yasuhiro; Serizawa, Masumi; San-Nami, Toshiro

doi:10.2208/kaigan.71.i_583

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal E

2015

DOI: 10.2208/kaigan.71.i_583

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Beach Erosion of Oharai-Isohama Coast Triggered by Decrease in Fluvial Sand Supply From Naka River

Chihaya Nomoto

Yasuhiro Osaki

Takaaki Uda

et al.

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Cited by 2 publications

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Erosion of Oharai-Isohama Coast and Caving of Seawall of Oharai Aquarium

Uda¹,

Matsu-Ura²,

Osaki³

et al. 2016

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal E

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2 茨城県土木部河川課(〒310-8555 茨城県水戸市笠原町978番6) 3 一般財団法人土木研究センター(〒110-0016 東京都台東区台東1-6-4タカラビル) 4 海岸研究室(有)(〒160-0011 東京都新宿区若葉1-22 ローヤル若葉301) 茨城県の大洗磯浜海岸にある大洗水族館前には，1961年頃までは幅130 mもの砂浜が広がっていたが，急速に侵食が進み，護岸が波に曝される状態となった．2015年10月には階段護岸の空洞化が始まって陥没の危険性が高まり，2015年11月18日には階段護岸を強制的に崩落させねばならない事態となった．本研究では，最終的に破壊に至った大洗水族館の護岸を実例として，護岸の被災原因について考察した．空中写真とWorldView-2衛星画像を用いて大洗磯浜海岸の長期的な汀線後退状況を把握した上で，数回の現地踏査とドローンによる低空(150 m)からの空中写真撮影により護岸の被災原因について考察した．

show abstract

Erosion of Oharai-Isohama Coast and Caving of Seawall of Oharai Aquarium

Uda¹,

Matsu-Ura²,

Osaki³

et al. 2016

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal E

View full text Add to dashboard Cite

show abstract

Beach Erosion on Oharai-Isohama Coast and Beach Stabilization by Groins and Beach Nourishment Using Coarse Material

Uda¹,

Otsuka²,

Aono³

et al. 2018

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal E

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Beach Erosion of Oharai-Isohama Coast Triggered by Decrease in Fluvial Sand Supply From Naka River

Cited by 2 publications

References 3 publications

Erosion of Oharai-Isohama Coast and Caving of Seawall of Oharai Aquarium

Erosion of Oharai-Isohama Coast and Caving of Seawall of Oharai Aquarium

Beach Erosion on Oharai-Isohama Coast and Beach Stabilization by Groins and Beach Nourishment Using Coarse Material

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