Engineered coastal berm-dune renourishment in New Jersey: can coastal communities continue to hold the line?

Engineered coastal berm-dune renourishment in New Jersey: can coastal communities continue to hold the line?
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新泽西州工程沿海护堤沙丘修复:沿海社区能否继续坚守阵地?

DOI:
10.1139/anc-2020-0024
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发表时间:
2021
影响因子:
2.4
通讯作者:
Ashton, Andrew
Ashton, Andrew
中科院分区:
--
文献类型:
--
作者:
Kolodin, Jesse;Lorenzo-Trueba, Jorge;Hoagland, Porter;Jin, Di;Ashton, Andrew

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在2012年飓风桑迪造成的重大海岸变化之后,沿着新泽西海岸线建造了工程化的护堤沙丘,以加强对未来风暴的保护。建造后,新泽西州长滩岛的三个海滨社区的房地产价值增加。这些项目的资金完全来自联邦救灾援助,但未来的维护费用必须由当地社区承担。社区是否愿意或有能力在财政上为维护做出贡献仍不清楚,因为(一)一些房主更喜欢海景,而不是护堤沙丘结构提供的保护,以及(二)利益相关者的风险认知会随着时间的推移而改变。为了研究沙堤沙丘的几何形状、海岸保护价值和海景价值之间的关系,我们开发了一个自然和人为过程的地质经济模型,该模型塑造了海滩和沙丘形态。模型结果表明,沿海社区可能会表现出显着的差异,他们的能力,以保持工程沙丘取决于利益相关者的财富和风险认知。特别是,对海景有强烈偏好的社区不太可能长期维持大规模的护堤沙丘结构。如果这些结构被废弃,海岸对未来风暴的脆弱性将增加。
Following the significant coastal changes caused by Hurricane Sandy in 2012, engineered berm-dunes were constructed along the New Jersey coastline to enhance protection from future storms. Following construction, property values on Long Beach Island, NJ, increased in three beachfront communities. The projects were financed entirely through federal disaster assistance, but the percentage of future maintenance costs must be covered by local communities. Whether communities are willing or capable of financially contributing to maintenance remains unclear because (i) some homeowners prefer ocean views over the protection afforded by the berm-dune structures, and (ii) stakeholder risk perceptions can change over time. To investigate the relationships between berm-dune geometries, values of coastal protection, and ocean view values, we developed a geoeconomic model of the natural and anthropogenic processes that shape beach and dune morphology. The model results suggest that coastal communities may exhibit significant differences in their capabilities to maintain engineered dunes depending on stakeholder wealth and risk perception. In particular, communities with strong preferences for ocean views are less likely to maintain large-scale berm-dune structures over the long term. If these structures are abandoned, the vulnerability of the coast to future storms will increase.
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