期刊
COASTAL ENGINEERING
卷 63, 期 -, 页码 62-80出版社
ELSEVIER
DOI: 10.1016/j.coastaleng.2011.12.010
关键词
XBeach model; Gravel barrier; Overwash; Storm impact; Threshold
资金
- EU [022441 (RII3)]
XBeach, a process-based numerical model capable of computing nearshore circulation and morphodynamics, including overwash and breaching, has been used in 1D mode to simulate erosion occurring on a gravel barrier beach (D-50 = 11 mm) subjected to wave and tidal forcing during selected tests undertaken during the BARDEX experiments. The model demonstrated good quantitative skill (Brier skill score, BSS, typically 0.65) with respect to beach face erosion, offshore accretion and morphological impacts of washover. XBeach was also used to model storm impacts on a steep (average tan beta = 0.12), 4.5 km-long and 100 m-140 m wide macrotidal gravel barrier (D-50 = 2 mm to 10 mm) located in SW England. Although the development of a storm berm was not reproduced well, erosion was predicted with sufficient skill (BSS = 0.60) to meet practical engineering requirements concerned with predicting storm impacts and threshold wave and water level conditions for gravel barrier overwashing. (C) 2011 Elsevier B.V. All rights reserved.
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