[1]杨兴明,宋骥衍,李 琛.尼泊尔“4·25”震后地质灾害发育特征及诱发因素分析——以日喀则萨嘎县为例[J].华南地震,2026,46(01):62-76.[doi:10.13512/j.hndz.2026.01.08]
　YANG Xingming,SONG Jiyan,LI Chen.Development Characteristics and Inducing Factors of Geological Disasters After the Nepal“4·25”Earthquake：A Case Study of Saga County，Shigatse[J].,2026,46(01):62-76.[doi:10.13512/j.hndz.2026.01.08]
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尼泊尔“4·25”震后地质灾害发育特征及诱发因素分析——以日喀则萨嘎县为例()

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
46
期数:
2026年01期
页码:
62-76
栏目:
地震与地质灾害
出版日期:
2026-01-31

文章信息/Info

Title:
Development Characteristics and Inducing Factors of Geological Disasters After the Nepal“4·25”Earthquake：A Case Study of Saga County，Shigatse
文章编号:
1001-8662（2026）01-0062-15
作者:
杨兴明1; 2; 宋骥衍1; 2; 李 琛1; 2
1.河南省地质研究院，郑州 450001;2.河南省城市地质工程技术研究中心，郑州 450001
Author(s):
YANG Xingming1; 2; SONG Jiyan1; 2; LI Chen1; 2
1.Henan Academy of Geology ， Zhengzhou 450001， China;2.Henan Research Center of Urban Geological Engineering Technology ， Zhengzhou 450001， China
关键词:
地震; 萨嘎县; 地质灾害; 发育特征; 诱发因素
Keywords:
Earthquake; Saga County; Geological disaster; Development characteristics; Inducing factors
分类号:
P315.1
DOI:
10.13512/j.hndz.2026.01.08
文献标志码:
A
摘要:
以尼泊尔“4?25”8.1级地震后日喀则萨嘎县的地质灾害为研究对象，结合遥感解译、地面调查、测绘、勘探及实验等多项技术，系统分析了震后地质灾害的发育特征，探讨其形成条件和诱发因素。研究结果表明：萨嘎县地貌相对简单，地形高差较小，从而限制了地质灾害类型和规模的多样性。该地区以泥石流灾害为主，其形成与裸露基岩及第四系冲积地层密切相关。地形地貌在很大程度上控制了地质灾害的分布和发育。坡度在30°至50°的区域以滑坡为主，40°至60°的区域以不稳定斜坡为主，50°至90°的区域则以崩塌为主，而泥石流主要发生在坡度小于40°的区域。“4?25”尼泊尔地震对该地区地质环境影响显著，导致斜坡稳定性降低。地震引发灾害的机制主要包括直接激发和潜伏后发：在坚硬岩性区域，直接激发效果尤为显著；潜伏后发则多见于软岩及松散的表层岩土体。地质条件因素是影响调查区萨嘎县地质灾害的主要因素，其次是降雨和人类活动。三者之间相互作用，共同塑造了该地区地质灾害的发生机制。
Abstract:
Taking the geological disasters in Saga County，Shigatse after the“4?25”M8.1 earthquake in Nepal as the research object，combined with remote sensing interpretation，field surveys，surveying and mapping，ex ploration and experiments， this paper systematically analyzed the development characteristics of post-earthquake geological disasters and discussed their formation conditions and inducing factors. The results show that Saga Coun ty’s relatively uniform terrain and limited elevation variance restrict the diversity and scale of geological disasters.The region is primarily affected by debris flow disasters，which are closely related to the exposed bedrock and the Quaternary alluvial strata. The development and distribution of geological disasters are strongly influenced by the re gional topography. Specifically， the area with a slope of 30° to 50° is dominated by landslides， the area with a slope of 40°to 60°is dominated by unstable slopes，and the area with a slope of 50°to 90°is dominated by col lapse，and debris flows mainly occur in area with a slope of less than 40°. The“4?25”Nepal earthquake had a significant impact on the regional geological environment， resulting in a decrease in slope stability. The mecha nism of earthquake-induced disasters mainly includes direct excitation and latent recurrence： direct excitation is more pronounced in areas with hard rock， while latent recurrence is more common in soft rock and loose surface rock and soil. Geological conditions are the main factors affecting the geological disasters in Saga County，followed by rainfall and human activities. The interaction among the three has jointly shaped the mechanism of geological di sasters in the region.

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备注/Memo

备注/Memo:
收稿日期：2025-07-30
基金项目：河南省地质研究院院管省财政项目（2025-902-XM09）
作者简介：杨兴明（1975-），男，高级工程师，研究方向为水文地质及工程地质。E-mail：136621413@qq.com
更新日期/Last Update: 2026-02-03