High-resolution atlas of extreme wave height and relative risk ratio for US coastal regions

IF 4.6 2区 工程技术 Q1 ENGINEERING, CIVIL
Seongho Ahn , Vincent S. Neary
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引用次数: 0

Abstract

Interest in marine energy development has motivated numerous studies on extreme wave conditions to characterize wave loads and project risks. Metrics on extreme wave conditions, including extreme wave height, are limited in nearshore regions by insufficient spatiotemporal coverage and resolution of wave data. This study estimates 1-, 5- and 50-year return period significant wave heights, and relative-risk-ratios computed by non-dimensionalizing these extreme wave heights with their mean values, for US nearshore regions using 32-year regional SWAN wave hindcasts with spatial resolutions of 200–300 m. The model-derived extreme wave height estimates are systematically biased lower than buoy-derived estimates, but are well correlated enabling simple bias correction to buoy-observations. As wave heights at shallow nearshore sites are physically limited by depth-induced wave breaking, model-derived extreme wave height estimates are replaced with estimates using common empirical models based on breaking depth limits. The corrected high-resolution extreme wave height and relative risk ratio atlas generated herein provides important metrics that support resource characterization for the marine energy industry, including resource and site assessment, and the establishment of upper design limits for device type classification and certification to streamline product line development.
美国沿海地区极端波浪高度和相对风险比高分辨率地图集
对海洋能源开发的兴趣促使人们对极端波浪条件进行了大量研究,以确定波浪载荷和项目风险的特征。在近岸区域,由于波浪数据的时空覆盖面和分辨率不足,包括极端波高在内的极端波浪条件指标受到限制。本研究利用空间分辨率为 200-300 米的 32 年区域 SWAN 波浪后报,估算了美国近岸区域 1 年、5 年和 50 年重现期的显著波高,以及通过将这些极端波高与平均值进行非维度化计算得出的相对风险比。由于近岸浅滩处的波高受到由深度引起的破浪的物理限制,因此用基于破浪深度限制的普通经验模型估算值取代了由模式得出的极端波高估算值。此处生成的校正高分辨率极端波高和相对风险比图集提供了重要的指标,可支持海洋能源行业的资源特征描述,包括资源和地点评估,以及为设备类型分类和认证建立设计上限,以简化产品线开发。
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来源期刊
Ocean Engineering
Ocean Engineering 工程技术-工程:大洋
CiteScore
7.30
自引率
34.00%
发文量
2379
审稿时长
8.1 months
期刊介绍: Ocean Engineering provides a medium for the publication of original research and development work in the field of ocean engineering. Ocean Engineering seeks papers in the following topics.
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