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本文以新疆三工河流域绿洲为研究区域,覆盖全流域选取了77个样点进行实地采样及地下水水质化验分析,运用GIS的地统计分析方法对水质数据进行半变异函数模型分析,揭示了干旱区绿洲地下水水质空间变异性特征。研究结果表明,整个绿洲地下水矿化度、Cl-离子、HCO-3离子和硫酸盐具有中等的空间相关性,硝酸盐具有较强的空间相关性;冲洪积扇绿洲地下水化学特征以NO-3-SO2-4-Ca-Mg型为主,矿化度通常<800mg/l,地下水硝酸盐含量较高,局部地区已造成了地下水硝酸盐污染;冲积平原绿洲地下水化学特征以SO2-4-CL--HCO-3-Ca-Na-K-Mg型为主,矿化度通常>1000mg/l,局部地区矿化度含量较高,主要以硫酸盐、氯化物为主。
In this paper, the oasis in the Sangong River Basin of Xinjiang was selected as the research area. 77 sampling spots were selected to conduct field sampling and groundwater quality analysis in the whole basin. The semi-variogram of the water quality data was analyzed by geostatistical analysis of GIS. Spatial variability of groundwater quality in district oasis. The results show that there is a moderate spatial correlation between groundwater salinity, Cl- ions, HCO-3 ions and sulfate in the whole oasis. Nitrate has a strong spatial correlation. The chemical characteristics of groundwater in alluvial fan oasis are characterized by NO- 3-SO2-4-Ca-Mg type, the salinity is usually <800mg / l, the nitrate content in groundwater is relatively high, and the groundwater nitrate pollution has been caused in some areas. The chemical characteristics of groundwater in the oasis alluvium are SO2-4- The type of CL - HCO - 3 - Ca - Na - K - Mg is dominated by mineralization degree> 1000mg / l. The content of mineralized degree in some areas is high, mainly sulphate and chloride.