National Assessment of Hurricane-Induced Coastal Erosion Hazards: Mid-Atlantic Coast (version 2)

These data sets contain information on the probabilities of hurricane-induced erosion (collision, inundation and overwash) for each 1-km section of the Mid-Atlantic coast for category 1-4 hurricanes. The analysis is based on a storm-impact scaling model that uses observations of beach morphology combined with sophisticated hydrodynamic models to predict how the coast will respond to the direct landfall of category 1-4 hurricanes. Hurricane-induced water levels, due to both surge and waves, are compared to beach and dune elevations to determine the probabilities of three types of coastal change: collision (dune erosion), overwash, and inundation. Data on dune morphology (dune crest and toe elevation) and hydrodynamics (storm surge, wave setup and runup) are also included in this data set. As new beach morphology observations and storm predictions become available, this analysis will be updated to describe how coastal vulnerability to storms will vary in the future. The data presented here include the dune morphology observations, as derived from lidar surveys taken immediately after the landfall of Hurricane Sandy.

本数据集包含大西洋中部海岸每1公里区段在1-4级飓风作用下，飓风诱发侵蚀（包括岸滩碰撞、淹没与越流）的发生概率信息。本分析基于风暴影响尺度化模型构建，该模型结合海滩地貌观测数据与高精度水动力模型，用以预测海岸对1-4级飓风直接登陆的响应过程。研究将风暴潮与海浪共同作用产生的飓风诱发水位，与海滩及沙丘高程进行对比，以此确定岸滩碰撞（沙丘侵蚀）、越流、淹没三类海岸变化的发生概率。本数据集同时涵盖沙丘地貌（沙丘脊线与坡脚高程）及水动力参数（风暴潮、波浪增水与波浪爬高）相关数据。当获取到新的海滩地貌观测资料与风暴预测结果后，本分析将进行更新，以阐明未来海岸面对风暴的脆弱性变化趋势。本次发布的数据集包含基于飓风“桑迪”（Hurricane Sandy）登陆后即刻开展的激光雷达（lidar）勘测获取的沙丘地貌观测数据。