REDUCTIONS IN BERM HEIGHT AND FORESHORE SLOPE DUE TO FILTRATION FLOW ON GRAVEL BEACH

Toshinori Ishikawa; Takaaki Uda; Masumi Serizawa; Mitsunaga Okamoto; Yasuhito Noshi; Shiho Miyahara

doi:10.9753/icce.v35.sediment.1

No. 35 (2016), Sediment Transport and Morphology

No. 35 (2016)

REDUCTIONS IN BERM HEIGHT AND FORESHORE SLOPE DUE TO FILTRATION FLOW ON GRAVEL BEACH

Sediment Transport and Morphology

Published 2017-06-23

Toshinori Ishikawa⁺⁻
Takaaki Uda⁺⁻
Masumi Serizawa⁺⁻
Mitsunaga Okamoto⁺⁻
Yasuhito Noshi⁺⁻
Shiho Miyahara⁺⁻

Toshinori Ishikawa

Public Works Research Center

Takaaki Uda

Public Works Research Center

Masumi Serizawa

Coastal Engineering Laboratory Co., Ltd.

Mitsunaga Okamoto

Numazu Public Works Office, Shizuoka Prefectural Government

Yasuhito Noshi

Nihon University

Shiho Miyahara

Coastal Engineering Laboratory Co., Ltd.

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Keywords

filtration flow
gravel beach
berm height
equilibrium slope
experiment
contour-line-change model

How to Cite

REDUCTIONS IN BERM HEIGHT AND FORESHORE SLOPE DUE TO FILTRATION FLOW ON GRAVEL BEACH. (2017). Coastal Engineering Proceedings, 1(35), sediment.1. https://doi.org/10.9753/icce.v35.sediment.1

Abstract

The closure mechanism of the mouth of a floodway owing to the deposition of gravel by waves was investigated, taking the Shin-nakagawa floodway flowing into the Fuji coast as an example. A movable bed experiment with a model scale of 1/50 using a two-dimensional wave channel was carried out, while changing the discharge of the floodway. It was found that the berm height and foreshore slope were reduced owing to the filtration flow on the gravel beach. A model for predicting beach changes with filtration flow based on the contour-line-change model was proposed. The effect of the filtration flow on the cross-shore sand transport was incorporated in the model, and the calculation results were in good agreement with the experimental results.

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References

Horikawa, K. ed. 1988. Nearshore Dynamics and Coastal Processes, University of Tokyo Press,

Tokyo, 522p.

Serizawa, M., T. Uda, T. San-nami, F. Furuike, and K. Kumada. 2003. Improvement of contour line

change model in terms of stabilization mechanism of longitudinal profile, Coastal Sediments '03,

†'15.

Shibasaki, M., T. Uda, M. Serizawa, T. Kumada, and A. Kobayashi. 2004. On the configuration of rip

channel accelerating development of rip current, Proceedings of 29th International Conference on

Coastal Engineering, ASCE, 1506†'1518.

Uda, T. and S. Kawano. 1996. Development of contour-line change model for predicting beach

changes, Proceedings of JSCE, No. 539/II-35, 121†'139. (in Japanese)

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REDUCTIONS IN BERM HEIGHT AND FORESHORE SLOPE DUE TO FILTRATION FLOW ON GRAVEL BEACH

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