RUI: Boulder beaches—the understudied archive on high-energy coasts

RUI：博尔德海滩——高能量海岸的待研究档案

• 批准号: 2020632
• 负责人: Rónadh Cox
• 金额: $ 34.4万
• 依托单位: Williams College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-07-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2020632&HistoricalAwards=false
• 关键词: RUI; Boulder; beaches; understudied; archive

As sea level rises and high-energy wave attack on coastal infrastructure becomes more frequent, there is a growing need for studies of high-energy coasts, both to understand coastal response to storms and coastal hazards, and also as a resource for engineers as they work to improve coastal protection approaches. Boulder beaches are the tangible record of storms on high-energy coasts, but they have been so little studied that a lack of data and understanding have prevented their integration into coastal modeling. This study will provide a better understanding of how boulder beaches respond to waves over time, contributing to the knowledgebase for sustainable coasts in the face of sea level rise and climate change. Several tiers of broader impacts span education, societal value, and outreach. The investigators will engage undergraduate researchers in every phase of this work with particular attention to diversity and inclusion. The data will be valuable to engineers, because boulder beaches are natural analogues for riprap and rubble, commonly used for coastal protection, performance and failure of which are still being studied. Finally, a collaboration with professional musicians will use percussion and vocal music to produce original musical representations of wave spectra, the generation of large waves by interactions among smaller wave sets, and wave impacts on boulder beaches. Bundled with contextual educational information (written and spoken word, field photographs, models and videos, integrated into presentations and pitched for general audiences), this innovative crossover approach will transmit coastal geoscience information to the general public. The principal investigators, students, and collaborators will measure clast populations and beach morphology—including boulder sizes, shapes, orientations, sorting, and packing, as well as topographic profiles—at twenty-two sites in Ireland, using both hands-on measurements and aerial photogrammetry. They will also quantify bedrock platform erosion using micro-measurements of clast abrasion trails and establish geomorphic context for the relationship between boulder beaches and supratidal coastal boulder deposits. Repeat measurements over multiple years will be analyzed via numerical differencing of photogrammetric DEMs. This will provide detailed and precise records of boulder beach response to storms, at all scales from quantifying changes in beach topography (identifying zones of erosion and/or aggradation), to tracking the movement of individual boulders. This will be the first multi-parametric study of the boulder beach environment, and should generate a synthetic understanding of this complex coastal system.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

随着海平面上升和高能海浪对沿海基础设施的攻击变得更加频繁，对高能海岸的研究需求越来越大，既可以了解沿海对风暴和沿海灾害的反应，也可以作为工程师改进沿海保护方法的资源。博尔德海滩是高能海岸风暴的有形记录，但对它们的研究太少，缺乏数据和理解，阻碍了它们融入海岸模型。这项研究将更好地了解巨石海滩随着时间的推移对海浪的反应，为面对海平面上升和气候变化的可持续海岸提供知识库。更广泛的影响有几个层面，包括教育、社会价值和推广。研究人员将在这项工作的每个阶段聘请本科研究人员，特别注意多样性和包容性。这些数据对工程师来说很有价值，因为巨石海滩是抛石和碎石的天然类似物，通常用于海岸保护，其性能和失效仍在研究中。最后，与专业音乐家的合作将使用打击乐和声乐来制作波浪谱的原始音乐表示，通过小波组之间的相互作用产生大波，以及波浪对巨石海滩的影响。与背景教育信息（书面和口头文字、实地照片、模型和视频，整合到演示文稿中并面向普通观众）捆绑在一起，这种创新的跨界方法将向公众传播沿海地球科学信息。主要研究人员、学生和合作者将在爱尔兰的22个地点测量碎屑种群和海滩形态，包括巨石的大小、形状、方向、分类和包装，以及地形剖面。他们将使用手工测量和航空摄影测量。他们还将利用碎屑磨损痕迹的微观测量来量化基岩平台的侵蚀，并为巨石海滩和潮上海岸巨石沉积之间的关系建立地貌背景。多年的重复测量将通过摄影测量dem的数值差异进行分析。这将提供巨石海滩对风暴反应的详细和精确的记录，从量化海滩地形的变化（确定侵蚀和/或恶化的区域）到跟踪单个巨石的运动。这将是第一次对巨石海滩环境的多参数研究，并应产生对这一复杂海岸系统的综合理解。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。