摘要
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 monitoring and sample analysis of groundwater conditions in the Ili River Irrigated Area, this paper analyzed the geochemical characteristics and spatio-temporal variation of groundwater in the Ili River Irrigated Area, Western Tianshan Mountains, China, using correlation analysis, principal component analysis and variogram model and Kriging. Results of the study showed that： 58.18% groundwater samples were non-salinized while 40.00% slightly salinized and 1.82% moderately salinized. Anions of groundwater were mainly Cl^-, SO4^2- while cations were mainly Ca2＋, Mg＋. Groundwater salinity （TDS）, EC and ions had strongly spatial variation while pH had very slightly spatial variation. The correlation between TDS and Cl was strongly positive significant, indicating that the degree of groundwater TDS depends on the contents of Cl in groundwater. TDS2, EC2, Cl2, HCO3^-, Na＋ and Mg^2＋ were the characteristic factors for salinization of the study region according to principal component analysis. The groundwater TDS increases, in the spatial scale, from eastern, northern and southern part to west of the research area. The groundwater TDS in March, in the temporal scale, was higher than the groundwater TDS in June, September and November.
出处
《地球化学》
CAS
CSCD
北大核心
2011年第2期179-187,共9页
Geochimica
基金
国家科技支撑计划项目(2007BAC15B02)
国家自然科学基金(40971020)
关键词
地下水
地球化学特征
时空分异
伊犁河流域
groundwater
geochemical characteristics
spatio-temporal variation
Ili River Valley
