新疆内陆河流域融雪期积雪深度变化影响因素研究

Study on influence factors of snow depth change during period of snow melting in inland river basin of Xinjiang

采用因子分析法结合多元线性回归分析法对影响融雪期积雪深度变化的因素进行分析。结果表明:融雪期积雪深度与热能因子(地表温度,气温,净辐射)呈负相关,与水汽因子(水汽压,相对湿度,降雨)呈弱的负相关。空气流动因子(日均风速)对其影响较微弱;在此基础上对各因素的影响强弱,按大小进行排序,各因素对融雪期积雪深度变化影响的排序为:热能因子>水汽因子>空气流动因子。建立的回归方程通过了显著性检验表明:利用因子分析法与多元线性回归分析法结合,分析融雪期积雪深度的变化影响因素是可行的。

Combining factor analysis method with multiple linear regression analysis method,the paper analyzed the influence of some factors on the change of snow depth during snow melting.The results show that snow depth in the period of snow melting negatively correlates with the thermal factors such as surface temperature,air temperature and net radiation,and weakly negatively correlates with vapor factors such as vapor pressure,relative humidity and precipitation.Air current factor such as daily average wind speed has weaker influence on snow depth.The sequence of various factors witch affect snow depth change from big to small is thermal energy,water vapor and air current factors.The significant examination to the regression equation showed that it is feasible to use the method to analyze the factors witch affect the change of snow depth during snow melting.