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基于遥感震害指数的尼泊尔地震综合烈度评估研究
张克诚1,2, 王晓青1, 丁香1
1.中国地震局地震预测研究所, 北京 100036;2.中国地震台网中心, 北京 100045
摘要:
2015年4月25日在尼泊尔廓尔喀县发生的8.1级地震及后续强烈余震,造成尼泊尔北部严重的人员伤亡和财产损失,灾区建筑物倒塌损失严重。本文利用现场震害调查资料和高分卫星遥感影像,开展建筑物震害遥感解译,得到各个遥感解译点的遥感震害指数,结合现场调查点评估的烈度拟合了遥感震害指数-实际震害指数转换关系,再根据遥感震害指数估计了全部解译点的震害指数及地震烈度。估计的烈度与现场调查结果对比显示出较好的一致性,研究结果为该地区今后发生地震提供了可借鉴的遥感评估震害指数转换模型。
关键词:  遥感震害指数  实际震害指数  尼泊尔地震  烈度评估
DOI:
分类号:P315
基金项目:“十三五”国家重点研发计划(2017YFB0504104)、高分遥感地震监测与应急应用示范系统(二期)高分卫星遥感地震烈度评估与地震损失评估应用示范(31-Y30B09-9001-13/15-06)和中国地震台网中心青年科技基金(QNJJ202213)共同资助
Comprehensive Intensity Assessment of Nepal Earthquake Based on Remote Sensing Earthquake Damage Index
Zhang Kecheng1,2, Wang Xiaoqing1, Ding Xiang1
1.Institute of Earthquake Forecasting, CEA, Beijing 100036, China;2.China Earthquake Networks Center, Beijing 100045, China
Abstract:
The earthquake with magnitude 8.1 occurred in Gorkha County,Nepal on April 25,2015,following strong aftershocks,caused serious casualties and property losses in northern Nepal,with buildings in the disaster area severely damaged. In this paper,the seismic damage investigation data and satellite remote sensing image were used to conduct remote sensing interpretation,in order to get the remote sensing-based seismic damage index. Then by comparing site point intensity from investigation and assessment in the field with remote sensing seismic damage index,we obtain the fitting transformation relation between remote sensing seismic damage index and actual seismic damage index. Then we estimate the seismic damage index and seismic intensity of full interpretation. The estimated intensity is in good agreement with the field survey results. Our results provide a reference for the transformation model of seismic damage index that can be used for disaster evaluation by remote sensing for earthquakes in this area in future.
Key words:  Remote sensing earthquake damage index  Actual earthquake damage index  Nepal earthquake  Earthquake intensity assessment