WILL NATURE WORK WITH US? EROSION AND FLOODING IMPACTS ON A UK BARRIER
WILL NATURE WORK WITH US? EROSION AND FLOODING IMPACTS ON A UK BARRIER
复制标题
大自然会与我们合作吗？
DOI：
10.1142/9789811204487_0011
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
I. Moeller
中科院分区：
文献类型：
--
作者：
J. Pollard;S. Brooks;T. Spencer;Elizabeth K. Christie;I. Moeller
“屏障岛”是指一个多样化的沿海地貌集合，通常支持大量人口，关键基础设施和生态系统。在全球范围内，许多沿海屏障正在经历气候变化的环境强迫，加上日益增加的人为压力。本文进行了高分辨率的海岸线变化分析，揭示如何布莱克尼点，混合砂砾石屏障位于英国东海岸，已经演变了百年，十年和事件的时间尺度。我们试图建立障碍演变的影响，对比管理制度下，目前的侵蚀和洪水灾害。询问一系列替代的海岸线代理揭示了一系列相互依赖的行为。在130年的研究期间，布莱克尼点被证明是向陆地滚动的平均速率为0.60米。假设未来几十年继续向陆地撤退，未来的洪水引发风暴事件将遇到比今天更多的向陆地海岸线位置。叠加在这一趋势上，我们观察到沿岸迁移侵蚀热点的存在，从而引起不可预测的形态在任何给定的位置上吐。最后，我们发现障碍物后退的实例是由个别风暴事件驱动的，这使得障碍物后退在时间和空间上都是高度可变和不连续的。这一点表现在存在过度冲刷现象，特别是隔离墙沿着的一些地段，这些地段的管理制度最近已转向不干预做法。
‘Barrier island’ refers to a diverse collection of coastal landforms that often support substantial human populations, critical infrastructures, and ecosystems. Globally, many coastal barriers are experiencing climatically altered environmental forcing coupled with increasing anthropogenic pressures. This paper undertakes high resolution shoreline change analysis to reveal how Blakeney Point, a mixed sandy-gravel barrier located on the UK’s East Coast, has evolved over centennial, decadal and event timescales. We seek to establish the implications of barrier evolution, under contrasting management regimes, for present erosion and flooding hazards. Interrogating a series of alternative shoreline proxies reveals a series of interdependent behaviors. Over the 130-year period of study, Blakeney Point is shown to be rolling landward at a mean rate of 0.60 m a-1. Assuming continued landward retreat over the coming decades, future flood-generating storm events will encounter more landward shoreline positions than today. Superimposed on this trend, we observe the presence of alongshore migrating erosional hotspots which give rise to unpredictable morphologies at any given location on the spit. Finally, we find that instances of barrier setback are driven by individual storm events, which makes barrier retreat both highly variable and discontinuous in time and space. This is illustrated by the presence of overwash, particularly along stretches of the barrier that have experienced a recent shift in management regime towards a non-interventionist approach.
沙质海岸线上的环境信号粉碎
影响因子：
3.4
作者：
Lazarus E
通讯作者：
Lazarus E
影响因子：
3.7
作者：
Neumann B;Vafeidis AT;Zimmermann J;Nicholls RJ
通讯作者：
Nicholls RJ
影响因子：
3.3
作者：
S. Brooks;T. Spencer;A. McIvor;I. Möller
通讯作者：
S. Brooks;T. Spencer;A. McIvor;I. Möller