AN ANALYTICAL MODEL TO PREDICT DUNE AND CLIFF NOTCHING DUE TO WAVE IMPACT

Proceedings of the International Conference on Coastal Engineering

Tsuguo Sunamura¹  Li Erikson¹  Magnus Per Larson²  Hans Hanson¹  Atilla Bayram¹ 

[1] Lund University

关键词: erosion;    cliff erosion;    notching;    analytical model;    laboratory experiments;   

DOI  :  10.9753/icce.v32.sediment.35

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A model was developed to calculate the evolution of a notch in a dune or cliff due to wave impact. Analytical solutions were derived to the model for schematized conditions regarding forcing and dune/cliff properties. Comparisons were made with laboratory experiments where the time evolution of the notch was measured. Values of the transport coefficients in the analytical solutions were determined by least-square fitting the solutions to the laboratory data. Some of these coefficients could be related to the ratio between parameters describing the forcing and the dune/cliff strength. The evolution of the dune notch displayed a linear behavior at short times, whereas the cliff notch showed a more complex response for cases where a feedback between the notch and a beach formed seaward of the cliff occurred.

【 授权许可】

Unknown