干旱区生态环境知识资源中心(Arid): 藏东南地区冰川泥石流形成条件初步分析以天摩沟冰川泥石流为例

Arid

	藏东南地区冰川泥石流形成条件初步分析以天摩沟冰川泥石流为例
其他题名	Preliminary analysis on formation conditions of glacier debris flow in Southeast Tibet a case of glacial debris flow in Tianmo Gully
	屈永平 1; 肖进 1; 潘义为 2
来源期刊	水利水电技术
ISSN	1000-0860
出版年	2018
卷号	49 期号:12 页码:177-184
中文摘要	针对融雪、降雨融雪等条件诱发的冰川泥石流形成过程,为了更好的认识藏东南地区冰川泥石流形成条件,选取藏东南地区天摩沟为研究对象,根据研究区流域特征、冰川覆盖面积以及气温等条件,在热化学、土力学以及流体力学等理论基础上,分析得到藏东南地区冰川泥石流在融雪条件下的起动流深阀值。结果表明:由于藏东南地区冰川泥石流沟分布高程影响,使得冰川泥石流沟所处的大气压为41.010~3 ~54.010~3kPa,使得雪线位置的冰川熔点上升至0.352 ~0.45 ℃;天摩沟冰川泥石流沟道冰碛物表层有效粒径(d_(10)= 10 mm)起动的临界流深为0.04 m;天摩沟冰川泥石流沟道冰碛物发生冲蚀剪切破坏时的临界地表流深为其侵蚀厚度的3.17倍;当天摩沟的降雨强度大于10.22 mm/h时可诱发冰川泥石流过程。研究成果为藏东南地区冰川泥石流的防治提供一定的参考。
英文摘要	In order to better understand the formation condition of glacier debris flow in the Southeast Tibet,Tianmo Gully in the region of the Southeast Tibet is selected as the case for the study on the formation process of glacier debris flow induced by the conditions of snow melting,rainfall-snowmelt, etc.,and then the threshold of the starting flow depth of the glacial debris flow under the snow melting condition in the region is analyzed herein based on the theories of thermochemistry,soil mechanics,Fluid Mechanics,etc. in accordance with the conditions of the watershed characteristics,glacier covering area and air temperature of the study area. The result shows that the atmospheric pressure is 41.010~3-54.0 10~3 kPa and the glacier melting point at the snow line rises up to 0.352 ~ 0.45 ℃ at the location of the glacier debris flow gully due to the effects of the elevation distribution of the glacier debris flow gullies located in the Southeast Tibet, while the starting critical flow depth of the effective particle size (d_(10)= 10 mm) of the surface glacial till of the glacial debris flow in Tianmo Gully is 0.04 m. Meanwhile, the critical surface flow depth when erosion-shearing failure of the glacial till of the glacial debris flow channel in Tianmo Gully occurs is 3.17 times of its erosion thickness. When the precipitation intensity is large the 10.22 mm/h within a day, the formation process of glacial debris flow can be induced. The study result can provide a certain reference for prevention and control of glacial debris flow in the Southeast Tibet.
中文关键词	西藏 ; 天摩沟 ; 冰川泥石流 ; 流深阀值 ; 寒旱区 ; 青藏高原 ; 地质灾害防治 ; 管涌型破坏模式
英文关键词	Tibet Tianmou Gully glacier debris flow flow depth threshold cold and arid region Qinghai-Tibet Platean prevention and control of geological hazards piping failure mode
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:6407843
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238253
作者单位	1.四川建筑职业技术学院, 德阳, 四川 618000, 中国; 2.中水东北勘测设计研究有限责任公司, 长春, 吉林 130061, 中国
推荐引用方式 GB/T 7714	屈永平,肖进,潘义为. 藏东南地区冰川泥石流形成条件初步分析以天摩沟冰川泥石流为例[J],2018,49(12):177-184.
APA	屈永平,肖进,&潘义为.(2018).藏东南地区冰川泥石流形成条件初步分析以天摩沟冰川泥石流为例.水利水电技术,49(12),177-184.
MLA	屈永平,et al."藏东南地区冰川泥石流形成条件初步分析以天摩沟冰川泥石流为例".水利水电技术 49.12(2018):177-184.