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Debris-flow of zelongnong ravine in Tibet

Journal of Mountain Science 2011年第4期8卷 535-543页

作者： ZHANG Jinshan SHEN Xingju Key Laboratory of Mountain Hazards and Earth Surface Processes Institute of Mountain Hazards and Environment CASChengdu 61oo41 China College of Tourism and History & Culture Southwest University for Nationalities Chengdu 61 oo41 China Graduate University CAS Beijing 10o049 China

zelongnong ravine,a branch ravine of Brahmaputra,is an old large glacier debris-flow ***-flows with medium and/or small scales occur almost every year;multiple super debris-flows have also broken out in history,and have caused destructive disaster to local residents at the mouth of ravine and blocked *** huge altitude difference and the steep slope of the zelongnong ravine provide predominant energy conditions for the *** drainage basin is located in the fast uplifted area,where the complicated geologic structure,the cracked rock,and the frequent earthquake make the rocks experience strong weathering,thus plenty of granular materials are available for the formation of *** this region is located in the rain shadow area,the precipitation is concentrated and most is with high ***,the strong glacier activity provides water source for *** to literature reviews,most debris-flows in the ravine are induced by rainstorms,and their scales are relatively ***,when the melted water is overlaid,the large scale debris-flows may *** calculation such as the flow velocity and the runoff is conducted according to the monitoring *** result shows that large debris-flows can be aroused when the rainstorm and the melted water are combined well,but the possibility of blocking off Brahmaputra is *** occurrence of the super debris-flows is closely related to the intense glacier activity(e.g.,glaciersurge).They often result in destructive disasters and are hard to be prevented and cured by engineering measures,due to the oversized *** hazard mitigation measures such as monitoring and prediction are proposed.

关键词： Tibet The Brahmaputra The Mt Namjagbarwa zelongnong ravine Debris-flow

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