Pre-and post typhoon sediment patterns in the central Philippine Islands

强烈的风暴会对生活在沿海地区的人们、已建成的基础设施以及近海的海洋渔业和生态系统造成毁灭性的影响。超级台风海燕是有史以来最大的风暴，于2013年秋季袭击菲律宾，造成严重的陆地破坏。同样，它对海洋生态系统和生物群落产生了毁灭性的影响，但由于其水下位置，这些影响的程度并不容易看到，因此通常没有得到记录和重视。本研究是美国国家科学基金会的快速响应，旨在记录和评估超级风暴“海燕”对菲律宾中部岛屿的沉积物侵蚀和再分配及其对海洋生物和海洋生态系统的影响。将通过活塞取心进行海底沉积物测绘和样本收集，以测量菲律宾中部群岛从潮间带到深水（海平面以下500米）环境中已有的碳酸盐和硅屑沉积物覆盖层的积累和/或侵蚀的净变化。调查结果将用于检查正常和极端事件时间框架之间沉积和侵蚀过程的差异。将使用活塞芯收集沉积物，并记录海底的摄影图像。还将收集研究区域的无人机航拍照片。这些数据将与首席研究员过去三年在同一地点拍摄的时间序列数据进行比较。将特别强调形成菲律宾渔业和旅游业基础的海草床、珊瑚礁和生物群落的变化。这项工作的更广泛影响包括与菲律宾和澳大利亚科学家的合作，以及对浅海和深海海洋生态系统的危害评估，这些评估可用于对太平洋岛国破坏性风暴的经济评估。

Strong storms can have devastating impacts on people living on the coasts, built infrastructure, and on marine fisheries and ecosystems that lie offshore. Super typhoon Haiyan, the largest storm ever recorded, hit the Philippines in the Fall of 2013 causing serious damage on land. Similarly, it had devastating impacts on marine ecosystems and biological communities, but the extent of these impacts because they are not readily visible due to their underwater locations are generally under documented and appreciated. This research is an NSF RAPID response to document and assess the sediment erosion and redistribution across the central Philippine Islands as a result of super storm Haiyan and its impact on sea life and marine ecosystems. Mapping of seafloor sediments and sample collection via piston coring will be undertaken to measure net changes in the accumulation and/or erosion of pre-existing carbonate and siliciclastic sediment cover from intertidal to deep water (500 meters below sea level) environments in the Central Philippine Islands. Results of the investigation will be used to examine differences in sedimentation and erosion processes between normal and extreme-event timeframes. Sediments will be collected using piston cores and photographic images will be recorded of the seafloor. Drone-enabled aerial photography of the study area will also be collected. These data will be compared with time-series data of the same locations that have been taken over the last three years by the principle investigator. Particular emphasis will be given to changes in sea grass beds, reefs, and biological communities that form the basis of Philippine fisheries and tourism. Broader impacts of the work include collaboration with Philippine and Australian scientists and hazard assessment of shallow and deep offshore marine ecosystems that can be used for economic assessment of damaging storms in Pacific Island nations.