NUMERICAL SIMULATION OF SHORELINE CHANGE WITH LONGSHORE SAND WAVES AT GROINS

Proceedings of the International Conference on Coastal Engineering

Nicholas C. Kraus²  Hans Hanson¹  Michelle M. Thevenot² 

[1] Department of Water Resources Engineering, University of Lund;US Army Engineer Waterways Experiment Station, Coastal and Hydraulics Laboratory, 3909 Halls Ferry Road, Vicksburg

关键词: numerical simulation;    shoreline change;    longshore sand waves;    sand waves;    groin;   

DOI  :  10.9753/icce.v25.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

Longshore sand waves (LSWs) are macro-morphologic features that maintain form while migrating along the shore with speeds on the order of kilometers per year. LSWs can dominate shoreline evolution by causing both apparent long-term erosion and accretion seemingly unrelated to the calculated or estimated net and gross longshore sand transport rates. This paper explores three possible mechanisms, wave asymmetry, form advection, and surf-zone contraction, hypothesized to maintain and translate LSWs. The mechanisms are implemented within the framework of a shoreline change numerical model. Simulations implementing the LSW evolution mechanisms are tested with observations made ofLSWs at Southampton, Long Island, New York. Consideration is also given to movement of LSWs at and through groins. It is concluded that fundamental questions remain on processes governing the behavior of LSWs.

【 授权许可】

Unknown