摘要
茶隆隆巴曲位于帕隆藏布右岸,陡变地形孕育了大量高位地质灾害,威胁下游线性工程。采用多源、多期次高分辨率遥感数据,建立高位地质灾害遥感解译标志,厘定了研究区高位地质灾害类型,并详细阐述了其发育特征。结果表明,研究区主要地质灾害类型包括高位冰崩、高位崩塌、高位滑坡。其中高位冰崩发育3处,均位于沟谷上游南坡海拔5000 m斜坡,面积在15×104 m2以上。高位崩塌体发育19处,多分布于沟谷中游及上游主沟两侧高陡岸坡,北坡多于南坡。高位滑坡发育2处,位于沟谷上游,滑体以冰碛物为主。上述高位地质灾害在强震或强降雨作用下,极易发生失稳、堵沟,且堵沟后极易诱发洪水、泥石流等次生灾害链,对下游帕隆藏布造成堵江风险。
Chalonglongbaqu gully is located on the right bank of Parlung Zangbo.The steeply changing topography has bred a large number of high-level geological disasters,threatening the downstream linear engineering.Therefore,this paper uses multisource and multi-phase high-resolution remote sensing data to establish remote sensing interpretation signs of high-level geological disasters,determines the types of high-level geological disasters in the study area,and elaborates their development characteristics.The results show that the main types of geological disasters in the study area include high-level ice avalanches,high-level avalanches,and high-level landslides.Among them,there are 3 high-level ice avalanches,all of which are located on a slope with an altitude of 5000 m above the south slope of the upper reaches of the valley,with an area of more than 15×104 m2.There are 19 high-level avalanches,which are mostly distributed in the middle reaches of the valley and high and steep bank slopes on both sides of the upper main ditch.The northern slope is more than the southern slope.There are two high-level landslides located in the upper reaches of the valley,and the landslide is dominated by moraines.Under the action of strong earthquakes or heavy rainfall,the above-mentioned high-level geological disasters are prone to instability and blockage of ditch.After blocking the ditch,it is easy to induce secondary disaster chains such as floods and mudslides,which will cause the risk of blocking the river downstream of Parlung Zangbo.
作者
张田田
殷跃平
李滨
贺凯
王猛
赵超英
刘晓杰
ZHANG Tiantian;YIN Yueping;LI Bin;HE Kai;WANG Meng;ZHAO Chaoying;LIU Xiaojie(Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;China Institute of Geo-Environment Monitoring(Guide Center of Prevention Technology for Geo-hazards,MNR),Beijing 100081,China;China Geological Survey,Beijing 100037,China;Sichuan Geological Survey,Chengdu,Sichuan 610081,China;School of Geological Engineering and Surveying and Mapping,Chang’an University,Xi’an,Shaanxi 710054,China)
出处
《中国地质灾害与防治学报》
CSCD
2021年第3期9-16,共8页
The Chinese Journal of Geological Hazard and Control
基金
中国地质调查局地质调查项目(DD20211540)。
关键词
茶隆隆巴曲
高分辨率遥感
高位地质灾害
灾害链
Chalonglongbaqu gully
high-resolution remote sensing
high-level geological disasters
disaster chain
