A DIMENSIONLESS PARAMETER DESCRIBING SEA CLIFF EROSION

Akira Mano; Shigenori Suzuki

doi:10.9753/icce.v26.%p

No. 26 (1998), Conference Proceedings

No. 26 (1998)

A DIMENSIONLESS PARAMETER DESCRIBING SEA CLIFF EROSION

Conference Proceedings

https://doi.org/10.9753/icce.v26.%25p

Published 1998-01-29

Akira Mano⁺⁻
Shigenori Suzuki⁺⁻

Akira Mano

Disaster Control Research Center, Tohoku University

Shigenori Suzuki

Electric Power Development Co. Ltd.

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Keywords

erosion
cliff
dimensionless parameter

How to Cite

Mano, A., & Suzuki, S. (1998). A DIMENSIONLESS PARAMETER DESCRIBING SEA CLIFF EROSION. Coastal Engineering Proceedings, 1(26). https://doi.org/10.9753/icce.v26.%p

Abstract

Macroscopic analysis based on the energy conservation on sea cliff erosion gives a dimensionless parameter including recession rate of the cliff, wave energy flux at the breaking point, Young's modulus of rocks composing the cliff, and cliff height. This parameter was examined through field data on the Pukushima Coast where a series of soft rock cliffs extends about 50 km. The modulus was obtained by the measurement of the propagation velocity of elastic waves in the rocks and the energy flux was evaluated by the wave ray method. The long-term recession rate had been obtained from the aerial photographs. The recession rate is shown to be proportional to the wave energy flux and inversely proportional to Young's modulus. These quantities prove that the dimensionless parameter has the constant value of 0.082.

https://doi.org/10.9753/icce.v26.%25p

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A DIMENSIONLESS PARAMETER DESCRIBING SEA CLIFF EROSION

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