干旱寒冷地区冻融期土壤水分和盐分的时空变异分析

Temporal and Spatial Variation Analysis of Freezing Thawing Soil Moisture and Salinity on Arid and Cold Region

在我国西北干旱、寒冷地区,降雨稀少、土壤蒸发强烈、土壤母质含盐、地下水位较高,冻融作用是土壤盐碱化独特的形成机制。利用经典统计分析方法对内蒙古河套灌区1994—2006年度冻融期不同土层(0～200cm)水分、盐分的均值、方差、标准差、峰度、偏度、变异系数等统计特征值进行计算,分析其时间、空间变异特征。

Freeze and thaw action is a particular mechanism of soil salinization in the northwestern arid and cold area with rare precipitation,high potential evaporation,shallow groundwater table and high mineral concentration.Using classical statistical analysis method,different soil layer（0~200 cm） moisture and salt mean,variance,standard deviation,kurtosis,skewness,coefficient of variation was calculated and temporal and spatial variation characteristics was analyzed in Inner Mongolia Hetao irrigation during 1994—2006 year freeze thawing period.