CAJ | 학술논문

近年来，由于全球气温升高，导致西藏地区泥石流暴发频率增加，其中包括冰川降雨型泥石流灾害。以西藏林芝地区的冰川降雨型泥石流为研究对象，首次通过观测冰川降雨型泥石流起动过程中水位、孔隙水压力等变化特征，得到水位、孔隙水压力与堆积坡度、堆积厚度的关系以及沟道物质起动特征，根据水位、空隙水压力的时间变化特征，得到不同试验条件下水位与孔隙水压力的相互关系。通过相似物理实验，分析实验过程中流量、流深、流速等参数与泥石流堆积坡度、堆积厚度的关系，并将冰川降雨型泥石流起动分为前期饱和阶段、起动阶段、堆积阶段。由相似比得到研究区典型冰川泥石流起动的流深、流速等野外观测结果与实验结果与一致，为研究区冰川降雨型泥石流的研究提供参考。
근년래，유우전구기온승고，도치서장지구니석류폭발빈솔증가，기중포괄빙천강우형니석류재해。이서장림지지구적빙천강우형니석류위연구대상，수차통과관측빙천강우형니석류기동과정중수위、공극수압력등변화특정，득도수위、공극수압력여퇴적파도、퇴적후도적관계이급구도물질기동특정，근거수위、공극수압력적시간변화특정，득도불동시험조건하수위여공극수압력적상호관계。통과상사물리실험，분석실험과정중류량、류심、류속등삼수여니석류퇴적파도、퇴적후도적관계，병장빙천강우형니석류기동분위전기포화계단、기동계단、퇴적계단。유상사비득도연구구전형빙천니석류기동적류심、류속등야외관측결과여실험결과여일치，위연구구빙천강우형니석류적연구제공삼고。
In recent years,with the global temperatures rising,the frequency of debris flow breakout events has increased,which includes glacial-rainfall type debris flow disasters in Tibet region. This paper will set the glacial- rainfall debris flow gully in Nyingchi of Tibet area as the research object,by observing the vary characteristics of water levels,pore water pressure in the starting process for the first time to get the relationship and its starting characteristics by water levels,pore water pressure,the slope,and the thickness of accumulation. By similar physical experiments,relationship of the experimental parameters among flow rate,flow depth,velocity and the slope,thickness of debris flow accumulation,the vary relationship of water level and pore water pressure are analyzed,according to the time relationship of the water level,pore water pressure under different test conditions, we could define the glacial-rainfall type debris flow starting process,which consists of early stage of saturated phase,starting phase and accumulation stage. The experimental results of flow depth,velocity are consistent with the field observation results of typical glacial debris flow in the study area,which are obtained by ratio of similitude provides the reference for the glacial-rainfall type debris flow study in research area.