Seismic risk assessment for the North Eastern Region of India by integrating seismic hazard and social vulnerability

IF 2.7 Q2 ENGINEERING, CIVIL

Sustainable and Resilient Infrastructure Pub Date : 2022-10-31 DOI:10.1080/23789689.2022.2133764

Navdeep Agrawal, Laxmi Gupta, J. Dixit, S. Dash

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引用次数: 2

Abstract

ABSTRACT The present study aims at conducting a comprehensive seismic risk assessment for the North Eastern Region of India at regional and sub-regional levels by integrating probabilistic seismic hazard and social vulnerability assessments. Bedrock-level peak ground acceleration varied from 0.14 to 0.69g for the return period of 475 years. Using PCA, the social vulnerability index (SVI) was generated considering district-level socioeconomic indicators. Built environment quality, illiteracy, access to amenities, dependent population, and employment opportunities contributed to high SVI. Most vulnerable districts were concentrated in the Brahmaputra floodplains, Tripura fold belt, and Imphal valley. At the regional level, significant parts of Assam, Meghalaya, Arunachal Pradesh, and Tripura lie in moderate to very high-risk zones. At the sub-regional level, Nagaland accounts for the highest proportion of areas in high to very high-risk zones. The findings will aid site-specific resilient infrastructure design, disaster risk reduction, and effective resource allocation for the risk-prone areas.

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综合地震灾害和社会脆弱性对印度东北部地区的地震风险评估

摘要本研究旨在通过整合概率地震灾害和社会脆弱性评估，在区域和次区域层面对印度东北部地区进行全面的地震风险评估。在475年的重现期内，基岩水平的峰值地面加速度在0.14至0.69g之间变化。使用主成分分析，社会脆弱性指数（SVI）是在考虑地区一级社会经济指标的情况下生成的。建筑环境质量、文盲、获得便利设施、依赖人口和就业机会是SVI高的原因。最脆弱的地区集中在布拉马普特拉河漫滩、特里普拉褶皱带和英帕尔河谷。在地区一级，阿萨姆邦、梅加拉亚邦、印控"阿鲁纳恰尔邦"和特里普拉邦的大部分地区位于中高风险地区。在次区域一级，纳加兰在高风险至极高风险地区所占比例最高。研究结果将有助于特定地点的弹性基础设施设计、减少灾害风险以及为风险易发地区进行有效的资源分配。

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来源期刊

Sustainable and Resilient Infrastructure ENGINEERING, CIVIL-

CiteScore

7.60

自引率

10.20%

发文量

期刊介绍： Sustainable and Resilient Infrastructure is an interdisciplinary journal that focuses on the sustainable development of resilient communities. Sustainability is defined in relation to the ability of infrastructure to address the needs of the present without sacrificing the ability of future generations to meet their needs. Resilience is considered in relation to both natural hazards (like earthquakes, tsunami, hurricanes, cyclones, tornado, flooding and drought) and anthropogenic hazards (like human errors and malevolent attacks.) Resilience is taken to depend both on the performance of the built and modified natural environment and on the contextual characteristics of social, economic and political institutions. Sustainability and resilience are considered both for physical and non-physical infrastructure.