人工结构对 2018 年喀拉喀托海啸沉积物粒度和特征的影响

IF 1.9 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS pure and applied geophysics Pub Date : 2024-08-21 DOI:10.1007/s00024-024-03558-1
Septriono Hari Nugroho, Purna Sulastya Putra, Amar, Mohammad Heidarzadeh
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引用次数: 0

摘要

本文首次详细分析了 2018 年喀拉喀托海啸的粒度参数和海啸沉积物,并考虑了建筑物和道路等人工结构。海啸在陆地上的沉积极其复杂,涉及海啸流传播的水动力、海啸的特征以及地形条件。在局部和细节方面,人工结构都会影响海啸沉积的形成。在这项研究中,我们重点研究了人工结构对 2018 年喀拉喀托海啸沉积特征的影响。实地观察表明,堤坝、房屋和沥青路的遗迹对海啸沉积物的来源、厚度、结构和粒度参数有很大影响。由细粒物质组成的海啸沉积物源自海底沉积物。在靠近未受人工结构影响的海域,海啸沉积物较厚,而在内陆地区则呈变薄趋势。一般来说,海啸沉积物的粒度比海啸前沉积物的粒度粗。海啸沉积物主要呈上升细化趋势。我们的研究解释了人工结构在海啸沉积形成中的关键作用以及沿海地区产生的沉积结构。人工结构的存在导致了粒度参数特征的急剧变化。总体而言,海啸沉积层本可以得到更好的分选。在沥青路上方的地点观察到明显不同的分选值。同样,峰度值也显示出异常。在受人工结构影响的地区,偏度值与平均粒度成反比。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Effects of Artificial Structures on Grain Size and Characteristics of the 2018 Anak Krakatau Tsunami Deposits

This paper presents the first detailed analysis of grain size parameters and tsunami deposit of the 2018 Anak Krakatau tsunami, considering artificial structures such as buildings and roads. The deposition of tsunamis on land is extremely complex, involving contributions from both the hydrodynamics of tsunami flow propagation and the characteristics of the tsunami, as well as topographical conditions. In both local and detailed contexts, artificial structures can affect the formation of tsunami deposits. In this study, we focused on the effect of artificial structures on the characteristics of the 2018 Anak Krakatau tsunami deposits. Field observations showed that the remains of dikes, houses and asphalt roads significantly influenced the source, thickness, structure of tsunami deposits and grain size parameters. Tsunami deposits consisting of fine-grained material originated from the sediment on the seafloor. Tsunami deposits were thicker in areas closer to the part of the sea unaffected by artificial structures and exhibited a thinning trend inland. In general, the grain size of tsunami deposits is coarser than that of pre-tsunami deposits. Tsunami deposits predominantly exhibit an upward fining trend. Our study explains the key role of artificial structures in the formation of tsunami deposits and the sediment structure produced in coastal areas. A drastic change in the characteristics of the grain size parameters results from the presence of artificial structures. Overall, the tsunami deposit layers could have been better sorted. Significantly different sortation values were observed at sites located above the asphalt road. Similarly, kurtosis values showed an anomaly. The skewness value was inversely proportional to the average grain size in areas affected by artificial structures.

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来源期刊
pure and applied geophysics
pure and applied geophysics 地学-地球化学与地球物理
CiteScore
4.20
自引率
5.00%
发文量
240
审稿时长
9.8 months
期刊介绍: pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.
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