地盤沈下を考慮した九十九里浜全域の長期海浜変形予測

大谷 靖郎; 宇多 高明; 大木 康弘; 五十嵐 竜行; 古池 鋼

doi:10.2208/kaigan.72.I_781

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

Online ISSN : 1883-8944
Print ISSN : 1884-2399
ISSN-L : 1883-8944

Paper

LONG-TERM PREDICTION OF BEACH CHANGES ON ENTIRE KUJUKURI BEACH CONSIDERING GROUND SUBSIDENCE

Yasuro OHTANI, Takaaki UDA, Yasuhiro OOKI, Tatsuyuki IGARASHI, Kou FURUIKE

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Keywords: Kujukuri Beach, beach erosion, shoreline change, ground subsidence, pumping-up of ground water, numerical simulation

JOURNAL FREE ACCESS

2016 Volume 72 Issue 2 Pages I_781-I_786

DOI https://doi.org/10.2208/kaigan.72.I_781

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Abstract

A model for predicting long-term beach changes on entire Kujukuri Beach was developed using the contour-line change model considering ground subsidence. By separating four periods between 1947 and 2015, net longshore sand transport distribution was estimated in each period. The results of the calculation agreed with the measured, and the appropriateness of the model was confirmed. Finally, the shoreline change in 30 years from the present was predicted with/without ground subsidence, and the effect of the ground subsidence was evaluated.

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