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Assessment of Regional Seismic Vulnerability in South Korea based on Spatial Analysis of Seismic Hazard Information
공간 분석 기반 지진 위험도 정보를 활용한 우리나라 지진 취약 지역 평가
Econ. Environ. Geol. 2019 Dec;52(6):573-86
Published online December 31, 2019;  https://doi.org/10.9719/EEG.2019.52.6.573
Copyright © 2019 the Korean society of economic and environmental gelology.

Seonyoung Lee and Seokhoon Oh*
이선영 · 오석훈*

Department of Energy and Resources Engineering, Kangwon National University, Chuncheon, Gangwon-do, 24341, Korea
강원대학교 공과대학 에너지자원공학과
Received October 28, 2019; Revised December 9, 2019; Accepted December 18, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
A seismic hazard map based on spatial analysis of various sources of geologic seismic information was developed and assessed for regional seismic vulnerability in South Korea. The indicators for assessment were selected in consideration of the geological characteristics affecting the seismic damage. Probabilistic seismic hazard and fault information were used to be associated with the seismic activity hazard and bedrock depth related with the seismic damage hazard was also included. Each indicator was constructed of spatial information using GIS and geostatistical techniques such as ordinary kriging, line density mapping and simple kriging with local varying means. Three spatial information constructed were integrated by assigning weights according to the research purpose, data resolution and accuracy. In the case of probabilistic seismic hazard and fault line density, since the data uncertainty was relatively high, only the trend was intended to be reflected firstly. Finally, the seismic activity hazard was calculated and then integrated with the bedrock depth distribution as seismic damage hazard indicator. As a result, a seismic hazard map was proposed based on the analysis of three spatial data and the southeast and northwest regions of South Korea were assessed as having high seismic hazard. The results of this study are expected to be used as basic data for constructing seismic risk management systems to minimize earthquake disasters.
Keywords : spatial analysis, GIS, geostatistics, seismic hazard map, assessment of regional seismic vulnerability

 

December 2019, 52 (6)