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首页> 外文期刊>Shore and beach >Observations of wave run-up, shoreline hotspot erosion, and soundside seiching during Hurricane Irene at the Field Research Facility
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Observations of wave run-up, shoreline hotspot erosion, and soundside seiching during Hurricane Irene at the Field Research Facility

机译：在艾琳飓风现场研究中心观察到波浪上升，海岸线热点侵蚀和边坡凝结

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The Field Research Facility, operated since 1977 by the U.S. Army Corps of Engineers, has a long-standing mission of collecting coastal observations during storms. The eye of Hur ricane Irene passed within 5 km of the facility and provided the opportunity to observe a full suite of cyclone effects on both the coastal ocean and a shallow estuary. New technology and the deployment of sensors in new locations reveal interesting findings in three topical areas: wave-driven run-up, shoreline erosional hotspots, and seiching in small, shallow estuaries. Results from a nearly continuously operating lidar mounted on the crest of a primary dune show substantial evolution of foreshore slope even after a storm profile was reached in the building phase of the storm. Run-up elevation measured from the lidar show a strong correlation to the height of waves at the base of the foreshore. Erosional hotspots are explored with Coastal Lidar And Radar Imaging System (CLARIS) which simultaneously measures beach topography, wave speed and breaking, and bathymetry. CLARIS data show a spatial relation ship between the radar-measured intensity of wave breaking on the foreshore and beach volume change. Consistent with the run-up observations, where larger waves at the foreshore forced higher run-up elevations, higher radar intensities at the foreshore are indicative of areas where waves have been less dissipated across the surf zone (i.e. minimal influence of sand bars) and deliver more energy and sediment transport potential directly onto the beach. An array of water level and current observations in the Currituck Sound, located on the west side of the Facility, shows the influence of basin seiching during the peak flooding and waning periods of Hurricane Irene. Seiching is shown to generate step-like plateaus in falling water levels and to retard the response to temporal and spatial variations in local wind forcing.
机译：自1977年以来，由美国陆军工程兵部队运营的野外研究设施长期以来一直致力于在暴风雨期间收集沿海观测资料。飓风艾琳（Eurene）的眼睛在距离设施5公里的范围内通过，并提供了观察整套旋风对沿海海洋和浅河口的影响的机会。新技术和传感器在新位置的部署揭示了三个主题领域的有趣发现：波浪驱动的上升，海岸线侵蚀性热点以及浅浅河口的围网。安装在主沙丘顶上的几乎连续工作的激光雷达的结果显示，即使在暴风雨的建造阶段达到暴风雨轮廓后，前滨坡度也会发生实质性变化。从激光雷达测得的上升高度与前岸底部的波浪高度密切相关。利用沿海激光雷达和雷达成像系统（CLARIS）探索侵蚀热点，该系统可同时测量海滩地形，波速和破裂以及测深。 CLARIS数据显示了雷达测量的前滨海浪破裂强度与海滩体积变化之间的空间关系。与上升观测一致，在前海较大的波浪迫使较高的上升高度，在前海较高的雷达强度表明波浪在整个冲浪区的耗散较少（即沙洲影响最小）和直接将更多的能量和沉积物输送潜力带到海滩上。位于设施西侧的库里塔克海峡中的一系列水位和当前观测资料表明，在飓风“艾琳”的洪灾和衰落期间，盆地围网的影响。已显示，Seiching在下降的水位中会产生阶梯状的平台，并会延迟对局部风强迫的时间和空间变化的响应。

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