喜马拉雅山区重大滑坡灾害空间分布特征研究
Research on Spatial Distribution Characteristics of Major Landslides Hazards in the Himalayas
王玉峰 1钱嘉贞 2程谦恭 1陈鹏海1
作者信息
- 1. 西南交通大学地球科学与工程学院,四川成都 611730
- 2. 浙江华东岩土勘察设计研究院有限公司,浙江 杭州 310030
- 折叠
摘要
以喜马拉雅山区重大滑坡灾害为研究对象,开展了重大滑坡灾害与高程、坡度、坡向、断裂构造和水系之间的空间分布关系研究.研究结果表明,研究区重大滑坡灾害成集群分布,滑坡高密度区分别在喜马拉雅山区西部、中部和东部,呈现出明显的断裂构造控制特征,受主中央断裂、藏南拆离系、雅鲁藏布江缝合带以及南北向裂谷等构造分布控制,与断裂构造距离越近,发育重大滑坡灾害的数量越多;在20°～40°坡度范围内的陡峭斜坡中滑坡最为发育,而该坡度范围坡体主要分布于河流两岸,明显受控于河流水系,表明河流水系与坡度共同耦合控制滑坡的孕育.通过分析探讨不同因素对重大滑坡孕育的控制作用,可以指导研究区重大滑坡灾害预测预报,为工程的早期勘测选址以及区域防灾减灾工作提供一定参考.
Abstract
This study focuses on the major landslide hazards in the Himalayas,examining the spatial distribution relationships between these hazards and factors such as elevation,slope angle,slope aspect,fault structures,and river systems,and the following main conclusions were obtained:Major landslides in the study area are distributed in clusters,with high-density landslide areas respectively located in the west,central,and east of the Himalayas.These areas show obvious fault structure control characteristics,controlled by structures such as the main central thrust,the South Tibetan Detachment System,the Yarlung Zangbo suture zone,and north-south-oriented rift valleys.The closer the proximity to fault structures,the more major landslide disasters develop.Landslides are most prevalent on steep slopes with the slope angle ranging from 20° to 40°,which are primarily distributed along the banks of rivers,indicating that river systems and slope angles jointly control the initiation of landslides.By analyzing and discussing the controlling effects of diverse factors on the initiation of major landslides,this study can guide the prediction and forecasting of major landslide hazards in the study area,providing valuable insights for early-stage engineering survey and site selection,as well as regional disaster prevention and mitigation efforts.
关键词
喜马拉雅山区/重大滑坡/孕灾因子/空间分布特征/主控因素Key words
Himalayas/major landslides/disaster-inducing factors/spatial distribution characteristics/main controlling factors引用本文复制引用
基金项目
第二次青藏高原综合科学考察研究项目(2019QZKK0906)
出版年
2024
NETL
NSTL
万方数据