基于SAR偏移量跟踪技术的加拉白垒峰典型冰川位移监测

Typical Glacier Displacement Monitoring of Gyala Peri Based on SAR Offset Tracking Technology

随着淡水资源的日益紧缺,冰川作为重要的淡水资源,与人民生活的关系愈发重要,同时冰川消融引起的地质灾害也深深影响着人们的生命和财产安全。以西藏加拉白垒峰区域典型冰川为研究对象,选用日本的L波段ALOS-2合成孔径雷达影像数据,采用基于强度的偏移量追踪技术,对加拉白垒峰周边冰川位移变化开展了监测研究。结果表明,加拉白垒峰北侧岗普冰川630天内方位向最大累积形变量超过60 m,其位移累积量和流速受其东侧支流的影响较大。相关研究结果可为藏南地区类似冰崩碎屑流灾害的减灾和防灾工作提供参考。

With the increasing shortage of freshwater resources,glaciers,as an important freshwater resource,have an increasingly important relationship with people's lives.At the same time,the geological disasters caused by the glacier melting also deeply affect the safety of people's life and property.This paper takes the typical glaciers in the Gyala Peri area of Tibet as the research object,selecting the L-band ALOS-2 synthetic aperture radar image data of Japan,and adopting the intensity-based offset tracking technology to monitor and research on the changes of glaciers displacement around the Gyala Peri.The results show that the maximum accumulation of Gangpu Glacier on the north side of Gyala Peri exceeds 60 m in 630 days,and its displacement accumulation and flow velocity are greatly affected by its east branch.The relevant research results of this paper could provide references for disaster mitigation and prevention of similar ice avalanche debris flow disasters in southern Tibet.