2005 Post-Hurricane Katrina EAARL Lidar-Derived Dune Crest, Toe and Shoreline

The Storm-Induced Coastal Change Hazards component of the National Assessment of Coastal Change Hazards project focuses on understanding the magnitude and variability of extreme storm impacts on sandy beaches. Lidar-derived beach morphologic features such as dune crest, toe and shoreline help define the vulnerability of the beach to storm impacts. This dataset defines the elevation and position of the seaward-most dune crest and toe and the mean high water shoreline derived from the 2005 Post-Hurricane Katrina (Mississippi to Florida) Experimental Advanced Airborne Research Lidar (EAARL) survey. Beach width is included and is defined as the distance between the dune toe and shoreline along a cross-shore profile. The beach slope is calculated using this beach width and the elevation of the shoreline and dune toe.

国家海岸变化灾害评估项目（National Assessment of Coastal Change Hazards project）下设的风暴诱发海岸变化灾害子课题，聚焦于探究极端风暴对沙质海滩的影响强度与波动特征。基于激光雷达（Lidar）提取的海滩地貌特征（如沙丘脊线、坡脚与岸线），可用于表征海滩抵御风暴影响的脆弱性。本数据集明确了向海最外侧沙丘脊线与坡脚的高程与位置，以及基于2005年飓风卡特里娜过后（密西西比至佛罗里达区域）实验型先进机载研究激光雷达（EAARL）勘测得到的平均高潮位岸线。数据集同时包含海滩宽度指标，其定义为沿跨岸剖面测得的沙丘坡脚与岸线之间的距离。海滩坡度则通过该海滩宽度，以及岸线与沙丘坡脚的高程计算得出。