摘要
乌鲁木齐河流域的季节积雪分布状况受冷期内连续降水过程的降雪量和气温所控制。水汽来向、山坡朝向、海拔高度和下垫面性质是影响积雪的主要因素。一般有瞬时积雪,不稳定积雪,稳定积雪和永久积雪之分。季节积雪的分布界限,在秋末冬初随海拔高度的降低而逐渐下移,春末夏初则随海拔高度增加而逐渐上移。到7月下旬或8月初移至海拔4000—4200m的雪线附近。由于风的再搬运作用,使本来不厚的自然积雪在公路的局部地段形成影响车辆通行的雪阻现象。
The distribution of snow cover in the Urumqi River basin depends on precipitation and air temperature in the cold season. The soures of vaporer, exposure of mountain slopes, elevation and ground surface conditions are the main factors influencing the snow distribution. Snow cover can be divided into fresh snow, unstationary snow, stationary snow and permanent snow. The seasonal snow line moves down during the period of late autumn through early winter, rises up from late winter through early spring, and reaches to the elevations of 4000—4200m a. s. 1. during late July and early August. The redistribution of snow cover by wind makes the thin snow cover on the highway become much more thick at some specific sections, which slows down the transportation.
出处
《干旱区地理》
CSCD
北大核心
1992年第4期78-84,共7页
Arid Land Geography
基金
天山冰川观测试验站基金
关键词
乌鲁木齐河
流域
积雪
公路
影响
Urumqi River basin, seasonal snow cover, duration of wnow cover
