National Assessment of Hurricane-Induced Coastal Erosion Hazards: Northeast Atlantic Coast

These data sets contain information on the probabilities of hurricane-induced erosion (collision, inundation and overwash) for each 1-km section of the Northeast 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 from May to July, 2010.

本数据集涵盖东北大西洋沿岸每1公里岸段在1至4级飓风作用下的飓风诱发海岸侵蚀概率信息，侵蚀类型包括碰撞侵蚀、淹没与越浪侵蚀。本次分析基于风暴影响尺度模型，该模型结合海滩地貌观测数据与高精度水动力模型，用于预测1至4级飓风直接登陆时海岸的响应过程。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，以此计算三种海岸变化类型的发生概率：碰撞侵蚀（沙丘侵蚀）、越浪侵蚀与淹没。本数据集同时包含沙丘地貌（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。随着未来获取更多海滩地貌观测数据与风暴预测结果，本分析将持续更新，以阐明沿海地区对风暴的脆弱性将如何随时间变化。本次发布的数据包含2010年5月至7月通过激光雷达（lidar）勘测获取的沙丘地貌观测结果。