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

9616311皮尔基建议立即对北卡罗来纳州莱特斯维尔海滩和托普赛尔岛附近的海岸面和内大陆架进行侧扫声纳、水深和潜水员振动岩心调查。飓风“伯莎之眼”于7月12日登陆此地。风暴前一周，在托普赛尔岛附近进行了一次广泛的侧向-科纳尔、地震和水深调查，作为定期安排的研究巡航的标准。在过去六年中，我们还开发了一个全面的数据库，其中包括SideCan-Conar、地震、振动岩心数据，以及莱特斯维尔海滩附近海岸面和内陆架的波浪和海流测量数据，用于持续研究海岸面沉积物覆盖层的地质框架和流动性。这种情况提供了一个独特的、史无前例的机会，可以详细审查一次重大风暴事件对一个经过充分研究的堰塞岛海面的影响(或缺乏影响)。对这一事件的即时记录至关重要；风暴后的过程可能会迅速修改或删除风暴特征。这项快速反应的调查将提供对海岸线较长期(数年至数十年)演变过程中大型短期事件的性质和重要性的洞察。

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.