摘要
在全球气候变暖的大背景下,冰川消融加剧,冰舌后退,冰川泥石流加剧。扎墨公路是目前通往西藏墨脱的唯一公路,公路必经的嘎龙曲发育藏东南地区典型的海洋性冰川泥石流,针对嘎龙曲冰川泥石流的物源特征,经现场调查得出,嘎龙曲冰川泥石流物源类型有冰碛物物源、崩塌型物源以及沟道堆积型物源三类,总结分析了三种物源类型的分布特征和启动模式。通过建立物源计算模型,定量计算嘎龙曲沟域内可参与泥石流活动的松散固体物源动储量为366.28×10~4m^3,其中冰碛物物源为主要的动储量物源,物源补给特征在藏东南海洋性冰川发育区域具有一定代表性。嘎龙曲沟域内水动力分布的不均一特性决定了物源启动参与泥石流活动的不均一性,随着全球气候变暖影响下水动力条件的增强,嘎龙曲冰川泥石流对扎墨公路的危害会愈加严重。
Under the background of global warming,glaciers melt,ice tongues retreat,glacial debris flows tend to be more active.Zhamo road is now the only road to Motuo county.Galongqu develops typical maritime glacier debris flows in southeastern Tibet.Based on the field survey,Galongqu valley is investigated through three kinds of material sources including moraine,collapse and channel accumulation.Distribution characteristics and participating modes of material sources are also summarized.On account of material source calculation models,the quantitative volume may participate in the Galongqu debris flow is 366.28×10 4 m 3,where the moraine source is dominant.The supplying of material sources here are representative in southeastern Tibet.Galongqu glacial debris flow might bear great hazard potential to Zhamo Road along with the global warming trend.
作者
张佳佳
刘建康
高波
陈龙
李元灵
邹任州
黄亮
ZHANG Jiajia;LIU Jiankang;GAO Bo;CHEN Long;LI Yuanling;ZOU Renzhou;HUANG Liang
出处
《地质力学学报》
CSCD
2018年第1期106-115,共10页
Journal of Geomechanics
基金
中国地质调查局项目(DD20160279)
国家自然科学基金(41402315)
关键词
冰川泥石流
物源特征
动储量
嘎龙曲
扎墨公路
藏东南
glacial debris flow
characteristic of material source
dynamic reverse
Galongqu
Zhamo Road
SE Tibet
