Storm-Induced Morphological Changes on the Shoreface and Inner Continental Shelf off Southeastern North Carolina: Immediate Post-Storm Research After Hurricane Bertha

风暴引起的北卡罗来纳州东南部海岸面和内大陆架的形态变化：飓风伯莎后立即进行的风暴后研究

• 批准号: 9616311
• 负责人: Orrin Pilkey
• 金额: $ 2.1万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-15 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9616311&HistoricalAwards=false
• 关键词: Storm; Induced; Morphological; Changes; Shoreface

9616311 Pilkey It is proposed to conduct immediately a sidescan-sonar, bathymetric, and diver-vibracore survey of the shoreface and inner continental shelf off Wrightsville Beach and Topsail Island, North Carolina. The eye of hurricane Bertha made landfall this location on 12 July. The week prior to the storm, an extensive sidecan-conar, seismic and bathymetric survey off Topsail Island was conducted as par of a regularly scheduled research cruise. Over the past six years, we have also developed a comprehensive database of sidecan-conar, seismic, vibracore data, as well as wave and current measurements on the shoreface and inner shelf off Wrightsville Beach for the ongoing studies of the geologic framework and mobility of the shoreface sediment cover. This situation furnishes a unique and unprecedented opportunity to examine in detail the impact (or lack thereof) of a major storm event on a well-studied barrier island shoreface. Immediate documentation of this event is critical; post-storm processes may quickly modify or erase the storm signature. This rapid-response survey will provide insight into the nature and importance of large-magnitude, short-term events in the longer-term (years to decades) evolution of the shoreface.

小行星9616311 建议立即对北卡罗来纳州赖茨维尔海滩和托普塞尔岛外的滨面和内大陆架进行侧扫声纳、测深和潜水员振动岩心勘测。 飓风伯莎的风眼于7月12日在此地登陆。 风暴来袭前一周，在托普赛尔岛（Topsail Island）附近海域进行了广泛的侧倾、地震和测深调查，作为定期研究巡航的一部分。 在过去的六年中，我们还开发了一个全面的数据库，其中包括侧倾、地震、振动岩心数据以及对赖茨维尔海滩外的滨面和内大陆架的波浪和海流测量，用于对滨面沉积物覆盖层的地质框架和流动性进行持续研究。 这种情况提供了一个独特的和前所未有的机会，详细检查的影响（或缺乏）的主要风暴事件的一个良好的研究屏障岛滨面。 立即记录这一事件至关重要;风暴后的过程可能会迅速修改或删除风暴特征。 这一快速反应调查将深入了解大规模短期事件在较长期（数年至数十年）的滨面演变中的性质和重要性。