Impact of sea-level rise on cross-shore sediment transport on fetch-limited barrier reef island beaches under modal and cyclonic conditions
Impact of sea-level rise on cross-shore sediment transport on fetch-limited barrier reef island beaches under modal and cyclonic conditions
复制标题
DOI：
10.1016/j.marpolbul.2015.06.017
复制
发表时间：
2015-08-15
影响因子：
5.8
通讯作者：
Mumby, P. J.
中科院分区：
文献类型：
--
作者：
Baldock, T. E.;Golshani, A.;Mumby, P. J.
将一维波浪模型与解析输沙模型相结合，研究了海平面上升对限采堡礁和泻湖岛屿海滩净跨岸输沙的可能影响。该模型考虑了礁滩上不同水位引起的泻湖近岸波高和波周期的变化是否可能导致沉积物的净离岸或在岸移动。结果表明，SLR对净泥沙运动的影响是高度可变的，并受礁湖水深的控制。珊瑚礁-泻湖水深测量的显著范围，特别是浅而窄的珊瑚礁，似乎导致了水动力条件和海滩，在单反下可能是稳定的，甚至是增生的。珊瑚礁结构复杂性的丧失，特别是在礁滩上，增加了沉积物从海滩和近海转移的机会。(C) 2015 Elsevier Ltd.版权所有。
A one-dimensional wave model is combined with an analytical sediment transport model to investigate the likely influence of sea-level rise on net cross-shore sediment transport on fetch-limited barrier reef and lagoon island beaches. The modelling considers if changes in the nearshore wave height and wave period in the lagoon induced by different water levels over the reef flat are likely to lead to net offshore or onshore movement of sediment. The results indicate that the effects of SLR on net sediment movement are highly variable and controlled by the bathymetry of the reef and lagoon. A significant range of reef-lagoon bathymetry, and notably shallow and narrow reefs, appears to lead hydrodynamic conditions and beaches that are likely to be stable or even accrete under SLR. Loss of reef structural complexity, particularly on the reef flat, increases the chance of sediment transport away from beaches and offshore. (C) 2015 Elsevier Ltd. All rights reserved.