[1]蒋 宁,苏凤环*,徐京华,等.尼泊尔地震重灾区同震滑坡的分形特征及其原因分析[J].山地学报,2020,(5):699-709.[doi:10.16089/j.cnki.1008-2786.000547]
 JIANG Ning,SU Fenghuan*,XU Jinghua,et al.Fractal Characteristics and Causes of Co-seismic Landslides in the Nepal Earthquake Extremely Stricken Areas[J].Mountain Research,2020,(5):699-709.[doi:10.16089/j.cnki.1008-2786.000547]
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尼泊尔地震重灾区同震滑坡的分形特征及其原因分析()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2020年第5期
页码:
699-709
栏目:
山区灾害
出版日期:
2020-11-10

文章信息/Info

Title:
Fractal Characteristics and Causes of Co-seismic Landslides in the Nepal Earthquake Extremely Stricken Areas
文章编号:
1008-2786-(2020)5-699-11
作者:
蒋 宁123苏凤环12*徐京华4葛永刚12刘 智5
1.中国科学院、水利部成都山地灾害与环境研究所,成都 610041; 2.中国科学院山地灾害与地表过程重点实验室,成都 610041; 3.中国科学院大学,北京 100049; 4.西南交通大学 地球科学与环境工程学院,成都 611756; 5.四川省地质调查院,成都 610081
Author(s):
JIANG Ning123 SU Fenghuan12* XU Jinghua4GE Yonggang12 LIU Zhi5
1. Institute of Mountain Hazards and Environment, Chengdu 610041, China; 2. Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences, Chengdu 610041, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China; 4. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China; 5. Sichuan Institute of Geological Survey, Chengdu 610081, China
关键词:
尼泊尔地震 同震滑坡 分形特征 关联维数 Logistic模型
分类号:
P694
DOI:
10.16089/j.cnki.1008-2786.000547
文献标志码:
A
摘要:
受“4·25”尼泊尔Ms8.1级地震影响,中尼边境山区发生了大量滑坡灾害,严重威胁人民生命安全及边疆经济建设。本文利用多时相遥感影像对震区滑坡进行了解译,引入关联维数探究了同震滑坡的空间分形特征,并结合二元Logistic模型和区域背景因素分析其形成原因。结果表明:(1)本次地震诱发的1431处滑坡大多为新生滑坡体,以浅层中小型为主,在高地震烈度区和公路两侧较为发育。受低角度逆冲断层影响,滑坡全部位于上盘,沿地震烈度圈长轴方向呈面状分布。(2)不同地震烈度区内的滑坡具有不同的分形特征,滑坡关联维数随着地震烈度等级的增大而增加,滑坡在空间上由聚集分布逐渐转变为均匀分布。(3)不同地震烈度区内的因子权重大小不同,其中距断层带距离因子对滑坡的影响最小,用该因子描述低角度逆冲断层地震同震滑坡存在一定的局限性,而坡度是对滑坡影响最大的因子。(4)在Ⅸ度地震烈度区内,各因素对滑坡的作用程度差异较小,滑坡的发生受到多因素共同控制,因此滑坡呈现相对均匀的分布特征; 反之,在Ⅵ度地震烈度区内,滑坡的发生主要受到单一因素控制,所以呈现相对聚集的分布特征。本研究可为探讨同震滑坡的空间分布规律、同震滑坡的分形特征以及震后灾害管理等提供资料参考。

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备注/Memo

备注/Memo:
收稿日期(Received date):2018-10-24; 改回日期(Accepted date):2020-08-21
基金项目(Foundation item):第二次青藏高原综合科学考察研究资助项目(2019QZKK0902); 自然资源部中国地质调查局地质调查项目(DD20190545); 四川省科技计划项目(2019YFH0038)。 [The Second Tibetan Plateau Scientific Expedition and Research Program(STEP)(2019QZKK0902); Geological Survey Project of China Geological Survey, Ministry of Natural Resources(DD20190545); Sichuan Foundation of Excellent Scientists(2019YFH0038)]
作者简介(Biography):蒋宁(1993-),男,河南开封人,博士研究生,主要研究方向:遥感技术与地理信息系统。[JIANG Ning(1993-), male, born in Kaifeng, Henan province, Ph.D. candidate, research on remote sensing technology and geographic information system] E-mail: jiangning@imde.ac.cn
*通讯作者(Corresponding author):苏凤环(1977-),女,山东阳谷人,博士,副研究员,主要研究方向:灾害遥感与山地灾害风险评估。[SU Fenghuan(1977-), female, born in Yanggu, Shandong province,Ph.D., associate professor, specialized in mountain hazards remote sensing and risk assessment ] E-mail: fhsu@imde.ac.cn
更新日期/Last Update: 2020-09-30