PREDICTION OF BEACH EROSION CAUSED BY REDUCTION OF FLUVIAL SAND SUPPLY DUE TO EXCESS SAND MINING AND BEACH RECOVERY AFTER PROHIBITION OF MINING

Toshiro San-nami; Takaaki Uda; Norikazu Ohashi; Hitoshi Iwamoto; Masumi Serizawa; Toshinori Ishikawa; Shiho Miyahara

doi:10.9753/icce.v33.sediment.61

No. 33 (2012), Sediment Transport and Morphology

No. 33 (2012)

PREDICTION OF BEACH EROSION CAUSED BY REDUCTION OF FLUVIAL SAND SUPPLY DUE TO EXCESS SAND MINING AND BEACH RECOVERY AFTER PROHIBITION OF MINING

Sediment Transport and Morphology

https://doi.org/10.9753/icce.v33.sediment.61

Published 2012-10-15

Toshiro San-nami⁺⁻
Takaaki Uda⁺⁻
Norikazu Ohashi⁺⁻
Hitoshi Iwamoto⁺⁻
Masumi Serizawa⁺⁻
Toshinori Ishikawa⁺⁻
Shiho Miyahara⁺⁻

Toshiro San-nami

Coastal Engineering Laboratory Co., Ltd.

Takaaki Uda

Public Works Research Center

Norikazu Ohashi

Shizuoka Public Works Office

Hitoshi Iwamoto

Shizuoka Public Works Office

Masumi Serizawa

Coastal Engineering Laboratory Co., Ltd.

Toshinori Ishikawa

Public Works Research Center

Shiho Miyahara

Coastal Engineering Laboratory Co., Ltd.

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Keywords

beach erosion
sand body
contour-line-change model
Shizuoka coast
sand mining

How to Cite

San-nami, T., Uda, T., Ohashi, N., Iwamoto, H., Serizawa, M., Ishikawa, T., & Miyahara, S. (2012). PREDICTION OF BEACH EROSION CAUSED BY REDUCTION OF FLUVIAL SAND SUPPLY DUE TO EXCESS SAND MINING AND BEACH RECOVERY AFTER PROHIBITION OF MINING. Coastal Engineering Proceedings, 1(33), sediment.61. https://doi.org/10.9753/icce.v33.sediment.61

Abstract

Long-term topographic changes since 1968 along the entire Shizuoka and Shimizu coasts including a 17 km stretch extending between the Abe River mouth and the tip of the Mihono-matsubara sand spit were investigated. Beach erosion of these coasts was triggered by the decrease in sediment supply from the Abe River due to excessive riverbed mining until 1967. After 1982/1983, natural sand supply from the river increased and accretion occurred on these coasts. Measured topographic changes were reproduced using the contour-line-change model considering changes in grain size. Not only the movement of the sand body but also the shoreline and bathymetric changes were numerically reproduced. The calculated results were in good agreement with the measured topographic changes.

https://doi.org/10.9753/icce.v33.sediment.61

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References

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Uda, T., M. Serizawa, M. Nishitani, and T. Ishikawa. 2008. Field investigation and numerical simulation of movement of sand body, Proc. 31st ICCE, pp. 2051-2063.

Uda, T., and M. Serizawa. 2010. Model for predicting topographic changes on coast composed of sand of mixed grain size and its applications, in 'Numerical simulations - examples and applications in computational fluid dynamics' Angermann, L. ed., INTEC, pp. 327-358.http://dx.doi.org/10.5772/12926

Uda, T. 2010. Japan's Beach Erosion - Reality and Future Measures, World Scientific, 418 pp.

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PREDICTION OF BEACH EROSION CAUSED BY REDUCTION OF FLUVIAL SAND SUPPLY DUE TO EXCESS SAND MINING AND BEACH RECOVERY AFTER PROHIBITION OF MINING

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