Application of the equilibrium planform concept to natural beaches in Northern Ireland

被引:25
|
作者
Jackson, Derek W. T. [1 ]
Cooper, J. Andrew G. [1 ]
机构
[1] Univ Ulster, Sch Environm Sci, Ctr Coastal & Marine Res, Coleraine BT52 1SA, Londonderry, North Ireland
关键词
Equilibrium planform concept; Embayed beaches; Beach stability; Wave diffraction point; North Ireland; BAY; STRATIGRAPHY; ACCRETION;
D O I
10.1016/j.coastaleng.2009.09.007
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The equilibrium planform concept (EPC) for bayed beaches has achieved wide currency in coastal morphodynamics. The north coast of Ireland comprises a series of discrete headland-embayment beaches within which waves and currents recycle a finite sediment volume. It is therefore an ideal setting in which to explore the applicability of the concept. Application of the approach to 9 embayment beaches on the north coast of Ireland provides some insights into the application of the concept. The planform of some beaches does correspond to that predicted while others do not. Those whose measured planform does not correspond to the predicted planform can be interpreted through, (a) difficulty in identifying the wave diffraction point, (b) disequilibrium on the beach (sediment scarcity or excess), (c) geological control of beach morphology. The subjectivity in selecting the diffraction point renders alternative explanations difficult and reduces the utility of the approach on natural shorelines, where significant irregularities render identification of such points difficult (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:112 / 123
页数:12
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