2010 New York USACE 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 2010 New York U.S. Army Corps of Engineers (USACE) lidar 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中的风暴诱发海岸变化灾害研究组分，旨在厘清极端风暴对沙质海滩的影响程度与波动特征。激光雷达（Lidar）反演得到的海滩地貌特征（如沙丘脊线、沙丘坡脚与海岸线），可用于表征海滩抵御风暴影响的脆弱性。本数据集基于2010年美国陆军工程兵团（U.S. Army Corps of Engineers, USACE）针对纽约地区开展的激光雷达测绘数据，界定了向海侧最远端的沙丘脊线、沙丘坡脚的高程与位置，以及平均高潮位海岸线。数据集同时包含海滩宽度参数，其定义为沿垂直岸线剖面测得的沙丘坡脚与海岸线之间的水平距离；海滩坡度则通过该海滩宽度、海岸线与沙丘坡脚的高程计算得到。