Sedimentology of coastal and lagoon deposits in the Seychelles islands - evidence of the 2004 Indian ocean tsunami and other high energy wave events

塞舌尔群岛沿海和泻湖沉积物的沉积学 - 2004 年印度洋海啸和其他高能波浪事件的证据

基本信息

批准号：
195688435
负责人：
Professor Dr. Hans Heinrich Bahlburg
金额：
--
依托单位：
Institut für Geologie und Paläontologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/195688435?language=en
关键词：
Sedimentology coastal lagoon deposits Seychelles

项目摘要

In the perception of the general public, the 2004 Indian ocean tsunami was an unique and uniquely devastating event. The documents published by the Seychelles government and scientific publications on the effects of the Indian ocean tsunami on the Seychelles islands make no reference to precursors in historic times. This may either mean that there were none, or that today there is no record, either oral or written.- The proposed project intends to address the following issues. (i) Is there a pre-2004 tsunami depositional record preserved in coastal plains and island lagoons? (ii) If so, what is the timing and in which way does this record correlate with the northern Sumatran record? (iii) Will it be possible to reconstruct the direction of approach of potential historic tsunami? (iv) Which are the lessons to be derived for hazard assessment and mitigation?- We propose a sedimentological study of shallow drill cores to be obtained in coastal plain and island lagoon settings to establish the presence or absence of a pre-2004 tsunami record on the Seychelles islands. Grain-size and thickness distributions of tsunami deposits can be used to calculate minimum values for characteristic tsunami parameters (inundation depth, flow speeds) during run up. 14C age dates of carbonate particles will establish the chronology of events and will permit the determination of recurrence intervals, and a comparison with records from other coasts.

在对公众的看法中，2004年印度洋海啸是一次独特而独特的毁灭性事件。塞舌尔政府和科学出版物发表的有关印度洋海啸对塞舌尔群岛的影响的文档没有提及历史时代的前代。这可能意味着没有，或者今天没有口头或书面记录。-拟议的项目打算解决以下问题。（i）2004年以前的海啸沉积记录保存在沿海平原和岛屿泻湖中？（ii）如果是这样，该记录与北部苏门答腊纪录相关的时机是什么？（iii）是否有可能重建潜在历史海啸的方法？（iv）在危险评估和缓解危险评估和缓解的课程中，哪些是经验教训？塞舌尔群岛。海啸沉积物的晶粒大小和厚度分布可用于计算运行过程中特征性海啸参数（淹没深度，流速）的最小值。 14C年龄的碳酸盐颗粒日期将建立事件的年表，并允许确定复发间隔，并与其他海岸的记录进行比较。