文章摘要
刘辉,郭红梅,黄丁发,赵真,张莹.一种基于自适应方法的地震烈度圈自动勾画关键技术研究[J].地震工程学报,2021,43(2):345-352. LIU Hui,GUO Hongmei,HUANG Dingfa,ZHAO Zhen,ZHANG Ying.Key Techniques for Automatic Delineation of Seismic Intensity Circles Based on Adaptive Method[J].China Earthquake Engineering Journal,2021,43(2):345-352.
一种基于自适应方法的地震烈度圈自动勾画关键技术研究
Key Techniques for Automatic Delineation of Seismic Intensity Circles Based on Adaptive Method
投稿时间:2019-11-06  
DOI:10.3969/j.issn.1000-0844.2021.02.345
中文关键词: 烈度圈;包络线;自适应算法;离散烈度点
英文关键词: intensity circle;envelope;adaptive algorithm;discrete intensity point
基金项目:“十三五”国家重点研发计划项目(2017YFC1500905);四川地震科技创新团队专项(201901)
作者单位E-mail
刘辉 西南交通大学 地球科学与环境工程学院, 四川 成都 611756  
郭红梅 四川省地震局, 四川 成都 610041 115453242@qq.com 
黄丁发 西南交通大学 地球科学与环境工程学院, 四川 成都 611756  
赵真 四川省地震局, 四川 成都 610041  
张莹 四川省地震局, 四川 成都 610041  
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中文摘要:
      地震烈度分布是震后灾害损失快速评估、应急救援和恢复重建工作开展的重要依据。目前地震烈度圈主要是由专家根据现场实地调查获得的烈度调查点,结合预评估烈度圈,采用GIS软件进行手动勾画得到。这种传统方法耗时耗力。提出一种基于自适应方法的地震烈度圈自动勾画方法,首先根据余震展布、居民地分布、断层属性等判断宏观震中位置,结合断裂带走向确定烈度圈长轴方向。在此基础上,利用星机地多源灾情信息融合后的最高离散烈度点生成包络线,将最高烈度与烈度圈面积的统计关系作为约束条件,运用自适应算法扩距得到最高烈度圈。在最高烈度圈的基础上,结合各级离散烈度点,基于上述方法,从高到低依次得到其他烈度圈。最后以九寨沟7.0级地震为例,实验结果表明,利用该方法能够自动生成烈度圈,利用震后获得的星机地多源灾情信息融合得到的离散烈度点生成的烈度圈准确度高于80%,有效提高地震烈度圈勾画的效率,可以为地震应急救援工作的快速开展提供支持。
英文摘要:
      Earthquake intensity distribution is an important basis for the rapid assessment of disaster losses, emergency rescue, and restoration and reconstruction after the earthquake. At present, the seismic intensity circle is mainly drawn manually according to the intensity survey points obtained from field survey by using the GIS software. However, the traditional method is inefficient and time-consuming. In this paper, a method of automatic delineation of seismic intensity circle was proposed. First of all, the factors affecting seismic intensity mapping were fully considered. According to the aftershocks distribution and the types of seismogenic faults, the location of macro epicenter and the long axis direction of intensity circle can be determined. Then, the envelope was generated based on the maximum discrete intensity points. The statistical relationship between the maximum intensity and the area of intensity circle was taken as the constraint condition, and the maximum intensity circle was obtained by using the adaptive algorithm. Finally, combined with different discrete intensity points, other intensity circles were obtained by using the above-mentioned method, and the Jiuzhaigou M7.0 earthquake was taken as an example. The experimental results showed that the proposed method can automatically generate intensity circle, and the accuracy of intensity circle generated by discrete intensity points obtained from the fusion of multi-source disaster information in 28 hours after the earthquake is over 80%. The method effectively improves the delineation efficiency of earthquake intensity circle, and can provide support for the rapid development of earthquake emergency rescue work.
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