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根据2009年伊犁河流域土壤盐分与地下水条件的监测和取样分析资料,运用相关分析法与主成分分析法,对伊犁河流域土壤盐分与地下水埋深、矿化度、电导率、p H值与主要离子之间的关系进行了分析。结果表明:1研究区土壤盐分垂直分布呈现强烈表聚性;研究区内58.18%地下水样为淡水,40.00%为微咸水,1.82%为咸水,地下水矿化度平均值为2.50 g·L-1左右,属于微咸水;研究区地下水矿化度、电导率与主要离子组成呈现强烈的空间变异性。2研究区垂直河道方向的各采样线土壤盐分与地下水矿化度的变化趋势基本相似;地下水埋深与矿化度受到灌区农业活动的影响,导致研究区土壤次生盐渍化。3主成分分析结果表明,影响研究区土壤含盐量的地下水环境因子可以归纳为地下水矿化度、EC、Cl-、Mg2+、Na+与地下水埋深。
According to the monitoring and sampling data of soil salinity and groundwater in Yili River Basin in 2009, correlation analysis and principal component analysis were used to analyze the relationship between soil salinity and groundwater depth, salinity, conductivity, p H and The relationship between the main ions was analyzed. The results showed that: 1 The vertical distribution of soil salinity in the study area showed a strong surface aggregation; 58.18% of groundwater samples in the study area were freshwater, 40.00% of which were brackish water, 1.82% of which were saline water, and the average of groundwater salinity was 2.50 g · L -1, which belongs to brackish water. The groundwater salinity, conductivity and main ion composition of the study area present strong spatial variability. 2 The trend of soil salinity and salinity of groundwater in sampling lines in the vertical direction of the study area are basically similar. The depth and salinity of groundwater are influenced by agricultural activities in the irrigation area, resulting in secondary salinization of soil in the study area. The results of principal component analysis showed that the groundwater environmental factors influencing soil salinity in the study area can be summarized as the degree of groundwater salinity, EC, Cl-, Mg2 +, Na + and groundwater depth.