Sediment Transport and Hydrodynamic Parameters of Tsunami Waves Recorded in Onshore Geoarchives
Sediment Transport and Hydrodynamic Parameters of Tsunami Waves Recorded in Onshore Geoarchives
复制标题
陆上地质档案馆记录的海啸波的沉积物迁移和水动力参数
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
H. Brückner
中科院分区：
文献类型：
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作者：
D. Brill;A. Pint;K. Jankaew;P. Frenzel;K. Schwarzer;A. Vött;H. Brückner
Brill，D.; Pint，A.; Jankaew，K.; Frenzel，P.; Schwarzer，K.; Vött，A.，Brückner，H.，2014.陆上地质档案中记录的海啸波的沉积物输运和水动力参数。在历史海啸记录较短的地区，对长期海啸风险的评估在很大程度上取决于史前事件的地质证据。虽然确定海啸沉积物的年代已经很成熟，但基于剩余沉积结构的震级评估仍然是一个重大挑战。在这项研究中，两种方法被应用于推断运输过程和海啸事件的流体动力学参数从陆上沉积物中发现的Ban Bang Sak，泰国西南部的沿海平原：（1）利用海啸的粒度测定、地球化学、矿物学和有孔虫以及各种海洋和陆地环境的参考样品，确定了最大的近海沉积物来源，（2）通过沉积模型估算了海啸波的陆上流速和水深。在2004年印度洋海啸（IOT）的情况下，模拟流速为3.7至4.9米/秒，模拟陆上流动深度高达5.5米，以及来自水深小于45 m的近海区域的沉积物来源-包括来自浅潮下带的作为推移质和悬浮质搬运的沿岸的沉积物-与基于幸存者录像和海啸后调查的引文一致。对于一个500至700岁的前辈，可比的流速和流动深度分别为4.1至5.9米/秒和4.0至7.5米，进行了建模，表明类似的规模作为IOT 2004。比较值的最大运输距离和波侵蚀深度也found. In三个较老的海啸候选人，日期为1180至2000 CAL BP的情况下，存款表明部分类似的源区水深小于45米，部分较浅的源区仅限于海滩。前一次海啸被解释为与2004年类似的事件，而后一次更可能是强度较低的风暴或海啸。
ABSTRACT Brill, D.; Pint, A.; Jankaew, K.; Frenzel, P.; Schwarzer, K.; Vött, A., and Brückner, H., 2014. Sediment transport and hydrodynamic parameters of tsunami waves recorded in onshore geoarchives. In regions with a short historical tsunami record, the assessment of long-term tsunami risk strongly depends on geological evidence of prehistoric events. Whereas dating tsunami deposits is already well established, magnitude assessment based on remaining sedimentary structures is still a major challenge. In this study, two approaches were applied to deduce transport processes and hydrodynamic parameters of tsunami events from onshore deposits found in the coastal plain of Ban Bang Sak, SW Thailand: (1) The maximum offshore sediment source was determined using granulometry, geochemistry, mineralogy and foraminifera of the tsunamites, and reference samples from various marine and terrestrial environments, and (2) the onshore flow velocities and flow depths of associated tsunami waves were estimated by means of sedimentation modelling. In the case of the Indian Ocean tsunami (IOT) of 2004, modelled flow velocities of 3.7 to 4.9 m/s, modelled onshore flow depths of up to 5.5 m, and a sediment source from offshore areas shallower than a 45-m water depth—including littoral sediments transported as bedload and suspended load from the shallow subtidal zone—are in agreement with quotations based on survivor videos and posttsunami surveys. For a 500- to 700-year-old predecessor, comparable flow velocities and flow depths of 4.1 to 5.9 m/s and 4.0 to 7.5 m, respectively, were modelled, indicating a similar magnitude as the IOT 2004. Comparable values of maximum transport distance and depth of wave erosion were also found. In the case of three older tsunami candidates, dated to 1180 to 2000 cal BP, the deposits indicate partly similar source areas with water depths of less than 45 m and partly shallower source areas restricted solely to the beach. Whereas the former tsunamis are interpreted as events similar to 2004, the latter are more likely storms or tsunamis of a lower magnitude.
TsuSedMod 反演模型应用于 2004 年苏门答腊岛和 2006 年爪哇海啸的沉积物以及对估计古海啸流动参数的影响
影响因子：
2.8
作者：
Spiske;Bahlburg;Roskosch;Amijaya
通讯作者：
Amijaya
影响因子：
3
作者：
Feldens, P.;Schwarzer, K.;Sompongchaiyakul, P.
通讯作者：
Sompongchaiyakul, P.
影响因子：
4
作者：
Engel, Max;May, Simon Matthias
通讯作者：
May, Simon Matthias