川藏公路安久拉山至古乡段雪崩分布规律  

Avalanche Distribution Analysis in Anjoula Mountain to Guxiang Section of Sichuan- Tibet Highway

作　　者：赵鑫 程尊兰[2] 李亚军 杨天军[3] 强巴 

机构地区：[1]云南省交通规划设计研究院陆地交通气象灾害防治技术国家工程实验室,云南昆明650011 [2]中国科学院水利部成都山地灾害与环境研究所,四川成都610041 [3]交通运输部科学研究院,北京100029 [4]西藏自治区交通工程质量安全监督局,西藏拉萨810000

出　　处：《山地学报》2015年第4期480-487,共8页Mountain Research

基　　金：国家自然科学基金项目"西藏扎墨公路不同山地垂直地带的泥石流形成机理和成灾规律"(41371038);交通运输部科技项目"川藏公路南线(西藏境)雪崩形成机制与雪崩启动监测预警技术研究"(201231879210)~~

摘　　要：根据对川藏公路安久拉山至古乡段调查所得的90处雪崩资料,运用统计方法得出研究区雪崩的分布情况。通过对该区灾害的发育与流域地貌的相关关系分析,发现安久拉山至古乡段的雪崩分布规律与地貌特征因子之间具有以下特性：1.雪崩主要分布在上游4 300-4 900 m峡谷地貌区段,海拔过高和过低较少发育;2.雪崩分布相对高差在300-1 100 m,占总数的74.44%;3.雪崩主要分布地形坡度为30°-40°,大于或小于这个范围较少发育;4.雪崩主要分布在阳坡。The characteristics of avalanche distribution. We counted and analyzed the 90 avalanche locations. And found the characteristics of avalanche distribution on space. Further,we analyzed the relationship between avalanche distribution and topographic factors,such as altitude,slope,aspect,relative elevation. Through statistical analysis,we obtain the characteristics of avalanche distribution： Avalanche geomorphology effect,that avalanche is mainly distributed in the upper reaches of the canyon area; Avalanche altitude effect,that the avalanche is mainly distributed in the 4 300 - 4 900 m height range,the area where too high and too low avalanche are less developed;（ Relative elevation of the avalanche effect,that the majority of avalanche relative elevation between 300 - 1 100 m,accounting for 74. 44%,the relative elevation is a concrete manifestation of the avalanche of matter and energy;Avalanche slope effect,that avalanche of the study area are most distribute in the range of 30° - 40°,avalanche on larger or smaller slope than this interregional are less developed; Avalanche aspect effect,that shady significantly compared to the number of sunny slope avalanche dominant.

关 键 词：雪崩 空间分布 川藏公路 安久拉山至古乡段 

分 类 号：P426.636[天文地球—大气科学及气象学]