2023 年卡赫拉曼马拉什地震序列中的液化地面变形和级联沿海洪水危害

IF 3.1 2区 工程技术 Q2 ENGINEERING, CIVIL Earthquake Spectra Pub Date : 2024-05-10 DOI:10.1177/87552930241247830
Patrick Bassal, Elena Papageorgiou, Diane M Moug, Jonathan D Bray, Kemal Onder Cetin, Arda Şahin, Ethan J Kubatko, Suranjan Nepal, Charles Toth, Sena B Kendır, Murat Bikçe
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引用次数: 0

摘要

2023 年的卡赫拉曼马拉什(Kahramanmaraş)地震序列在土耳其地中海港口城市伊斯肯德伦(İskenderun)沿岸造成了广泛的液化诱发的地面变形和持续的洪水。本研究从跨学科的角度对实地观测和分析进行了汇编,以研究地震诱发的液化是否是增加伊斯肯德伦洪水危害的重要因素。地震后的岩土工程勘察观测结果包括向海侧向扩展、建筑物下方沉降和沿海基础设施坍塌。三个横向扩展案例表明,填海造地区域的地面变形模式是一致的。通过合成孔径雷达(SAR)图像进行的持续散射干涉测量(PSI)发现,与周边地区相比,伊斯肯德伦沿海和城市地区震前和震后的沉降速度明显加快。PSI 测量还表明,地震后沉降速度加快,通常在观测到的液化现象附近沉降速度最高。这些评估结果表明,虽然沿海填海填料的液化造成了海岸线地区显著的地面变形,但伊斯肯德伦的持续下沉和其他因素也可能加剧了洪水灾害。这项工作的启示表明,评估多种灾害的液化和洪水后果对于提高沿海城市的抗灾能力非常重要。
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Liquefaction ground deformations and cascading coastal flood hazard in the 2023 Kahramanmaraş earthquake sequence
The 2023 Kahramanmaraş earthquake sequence produced extensive liquefaction-induced ground deformations and ongoing flooding along the shoreline of the Mediterranean port city of İskenderun, Türkiye. This study compiles field observations and analyses from cross-disciplinary perspectives to investigate whether earthquake-induced liquefaction was a significant factor for increasing the flood hazard in İskenderun. Geotechnical reconnaissance observations following the earthquakes included seaward lateral spreading, settlement beneath buildings, and failures of coastal infrastructure. Three presented lateral spreading case histories indicate consistent ground deformation patterns with areas of reclaimed land. Persistent scatterer interferometry (PSI) measurements from synthetic aperture radar (SAR) imagery identify a noticeably greater rate of pre- and post-earthquake subsidence within the İskenderun coastal and urban areas relative to the surrounding regions. The PSI measurements also indicate subsidence rates accelerated following the earthquakes and were typically highest near the observed liquefaction manifestations. These evaluations suggest that while the liquefaction of coastal reclaimed fill caused significant ground deformations in the shoreline area, ongoing subsidence of İskenderun and other factors likely also exacerbated the flood hazard. Insights from this work suggest the importance of evaluating multi-hazard liquefaction and flood consequences for enhancing the resilience of coastal cities.
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来源期刊
Earthquake Spectra
Earthquake Spectra 工程技术-工程:地质
CiteScore
8.40
自引率
12.00%
发文量
88
审稿时长
6-12 weeks
期刊介绍: Earthquake Spectra, the professional peer-reviewed journal of the Earthquake Engineering Research Institute (EERI), serves as the publication of record for the development of earthquake engineering practice, earthquake codes and regulations, earthquake public policy, and earthquake investigation reports. The journal is published quarterly in both printed and online editions in February, May, August, and November, with additional special edition issues. EERI established Earthquake Spectra with the purpose of improving the practice of earthquake hazards mitigation, preparedness, and recovery — serving the informational needs of the diverse professionals engaged in earthquake risk reduction: civil, geotechnical, mechanical, and structural engineers; geologists, seismologists, and other earth scientists; architects and city planners; public officials; social scientists; and researchers.
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