地质科技通报2025，Vol.44Issue(2)：355-367,13.DOI:10.19509/j.cnki.dzkq.tb20240172
藏南地区桑谷沟冰川泥石流形变历史分析和运动过程模拟
Deformation history analysis and movement process simulation of glacier debris flow in Sanggu Valley in southern Tibet
孙靖宜 1杨金 2吴永宁 1李群 2章广成 1周哲晟 1徐红剑1
作者信息
- 1. 中国地质大学(武汉)工程学院,武汉 430074
- 2. 中交第二公路勘察设计研究院有限公司,武汉 430058
- 折叠
摘要
Abstract
Glacial debris flows in the Yarlung Zangbo River basin of southeastern Tibet are characterized by their large scale,prolonged duration,and significant societal and environmental impacts.Investigating the deformation characteristics and influencing factors of Sanggu Valley debris flow offers critical scientific insights for predicting,early warning,and mitigating glacial debris flow disasters in this region.Traditional methods often fall short in quantitatively describing the formation mechanisms of large-scale debris flows.To address this limitation,this study integrates field investigations,unmanned aerial vehicle(UAV)aerial photography,satellite imagery,and geological and meteorological data.[Objective]This study aims to elucidate the relationship between debris flow outbreaks in Sanggu Valley and key influencing factors,including material sources and rainfall patterns.[Methods]A novel method combining interferometric synthetic aperture radar(InSAR)and random-access mass spectrometry(RAMMS)techniques is developed to analyze the deformation process of debris flows before and during their initiation.SBAS-InSAR technology is employed to quantify the deformation of Sanggu Valley debris flow during two outbreaks,complemented by satellite images,UAV images,and field investigations.This approach enables the inversion of deformation processes and the prediction of disaster trends prior to the Sanggu Valley debris flow event.Additionally,RAMMS debris flow numerical simulation software is utilized to model the movement dynamics of the Sanggu Valley debris flow during its eruption.[Results]This study yields the following key findings:① InSAR-derived LOS deformation analysis of the Sanggu Valley debris flow reveals the prolonged slope creep,with maximum deformation rates of 139 mm/a in the source area,46 mm/a in the flow area,and 20 mm/a in the accumulation area.Rainfall is identified as a critical factor in supplying loose materials for debris flow development.②The evolution process of the debris flow is categorized into three stages:initial motion,accelerated motion,and deceleration.[Conclusion]The proposed methodology,which integrates historical deformation analysis and numerical simulation of glacial debris flow dynamics,provides a scientific foundation for predicting debris flow development trends and designing effective engineering control measures.关键词
冰川泥石流/SBAS-InSAR/RAMMS/无人机航拍/泥石流成因/桑谷沟/藏南地区Key words
glacier debris flow/SBAS-InSAR/RAMMS/drone aerial photography/causes of debris flow/Sanggu Valley/southern Tibet分类
天文与地球科学引用本文复制引用
孙靖宜,杨金,吴永宁,李群,章广成,周哲晟,徐红剑..藏南地区桑谷沟冰川泥石流形变历史分析和运动过程模拟[J].地质科技通报,2025,44(2):355-367,13.
