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根据2009年伊犁河灌区地下水监测和取样分析资料,运用相关分析法、主成分分析法、半方差函数与克里格插值法,对伊犁河灌区地下水地球化学特征与地下水总溶解固体(TDS)时空分异特征进行了分析。结果表明,研究区58.18%地下水样为淡水,40.00%为微咸水,1.82%为咸水。地下水阴离子以Cl–和SO42?为主,阳离子以Ca2+和Mg2+为主。地下水TDS、电导率(γ)与主要离子呈现强烈的空间变异性,pH呈现弱的空间变异性。地下水TDS与Cl–呈极显著正相关关系,揭示了地下水TDS大小与Cl–含量水平的高低有关。主成分分析结果表明,TDS、γ、Cl–、HCO 3?、Na+与Mg2+可作为研究区地下水质特征因子。在空间尺度上,地下水TDS含量从研究区的东、北、南缘向研究区中西部方向有增加的趋势。从时间尺度来看,3月地下水TDS含量比9月、6月和11月大。
According to the data of groundwater monitoring and sampling in Ili Irrigation District in 2009, the correlation analysis, principal component analysis, semi-variance function and Kriging interpolation were used to analyze the relationship between the geochemical characteristics of groundwater and the total dissolved solids (TDS) Differentiation characteristics were analyzed. The results show that 58.18% of the groundwater samples in the study area are fresh water, 40.00% are brackish water and 1.82% are brackish water. Groundwater anion to Cl- and SO42? The main cation to Ca2 + and Mg2 + -based. Groundwater TDS, conductivity (γ) showed strong spatial variability with major ions, and pH showed weak spatial variability. Groundwater TDS and Cl-was a significant positive correlation, revealing the groundwater TDS size and Cl-content levels. Principal component analysis showed that TDS, γ, Cl-, HCO 3 ?, Na + and Mg 2+ could be used as groundwater quality factors in the study area. On the spatial scale, the TDS of groundwater tends to increase from the east, north and south of the study area to the middle and west of the study area. On a time scale, groundwater TDS levels in March were larger than in September, June and November.