作　　者： ; ; ; ; ;

机构地区： 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室

出　　处： 《中国矿业大学学报》 2010年第1期32-39,共8页

摘　　要： 为了解疏勒河流域上游区域多年冻土的分布状况,以野外考察与钻探、室内理论分析与建模为主要研究方法,以数字高程模型为主要数据基础,借助于地理信息系统软件(ARCGIS)和统计分析软件(SPSS),定量化研究了纬度、高程、坡度、坡向等因素对多年冻土分布的影响,建立了基于纬度、高程、太阳辐射的流域尺度的等效高程模型、辐射调整模型和区域多年冻土分布模型.以地温作为多年冻土类型划分的依据,实现了研究区域多年冻土的空间分布制图与特征分析.结果表明:多年冻土的分布面积为9447.16km2,占区域总面积的83%.其中,低温多年冻土是最主要的多年冻土类型(38%),其次是中、高温多年冻土(23%和14%),极高温多年冻土的分布面积和所占比例相对较小(8%);从空间分布特征来看,低温多年冻土主要分布于4.0～5.0km的海拔高度,中、高温多年冻土集中分布于3.5～4.5km的海拔高度,而极高温多年冻土则主要分布于3.0～4.0km的海拔高度. In order to understand the distribution patterns of permafrost in the upper area of the Shule River, based on the methods of field investigation and borehole drilling, as well as theoretlc ana the distr ysis and model building in doors, the effects of latitude, altitude, slope and aspect on bution of permafrost were studied quantitatively and a Regional Permafrost Distribution Model which took the latitude, elevation and the direct incoming solar radiation as the inputting variables was constructed. Taking ground temperatures of permafrost as the classification principles of permafrost and with the application of GIS technique, the works of compiling the distribution map of permafrost and analyzing the spatial distribution patterns were carried out. The results show that 1） from the distribution area and the percentage accounting for the whole area, low-temperature permafrost is the major type of permafrost, and then are middleand high-temperature permafrost, yet the distribution area and the percentage of extreme-highemperature permafrost are smaller relatively; 2） from the distribution pattern of each permafrost, low-temperature permafrost is distributed mainly in the altitude zone of 4. 0- 5.0 km, and middle-and high-temperature permafrost are distributed mainly in the altitude zone of 3.5- 4.5 km, and extreme-high-temperature permafrost is distributed mainly in the altitude zone of 3.0-4.0 km.

关 键 词： 多年冻土 分布特征 疏勒河流域上游

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