为研究新疆塔里木沙漠公路沿线浅层地下水水化学特征及其成因，运用数理统计、Piper三线图、Gibbs图、相关性分析和离子比值等方法分析研究区2014年20组浅层地下水水样测试结果，并探讨沙漠公路沿线水化学演化过程的主要控制因素。研究结果表明，浅层地下水中主要阴阳离子为SO42-和Na+；TDS介于543.61～10249.74 mg/L，平均值为4 087-58mg/L；pH值的范围在7.11～9.05，平均值为7.87；总硬度超过450 mg/L的水样占95%；地下水水化学类型以SO4·Cl Na型、SO4·Cl Na·Mg型和SO4·Cl Na·Ca型为主；地下水中SO42-和Na+是TDS的主要来源，且SO42-和Na+主要来源于岩盐或蒸发岩溶解；各主要离子间均有较好的相关性，其来源具有一致性；大气降水作用对研究区地下水化学组分几乎没有影响，地下水主要受蒸发浓缩和岩石风化作用影响；地下水中主要离子来源受硅酸盐岩和蒸发盐岩风化溶解影响较大，同时受到碳酸盐岩的溶解和阳离子交换作用影响。

Desert Highway in Xinjiang,we analyzed the test data of 20 groundwater samples in the study area in 2014 and explored the major controlling factors of the hydrochemical evolution processes along the highway by means of mathematical statistics,Piper triangular diagrams,Gibbs figure,correlation analysis,and ion ratios.The results showed that the major anions and cations in the shallow groundwater were SO42- and Na+.The total dissolved solids (TDS) concentration ranged from 543.61 to 10249.74 mg/L with an average value of 4087.58 mg/L.The pH ranged from 7.11 to 9.05 with an average value of 7.8 7.95% of the water samples had a total hardness above 450 mg/L.The major hydrochemical types of groundwater were SO4·Cl Na,SO4·Cl Na·Mg and SO4·Cl Na·Ca.SO42- and Na+ were the main sources of TDS,and they were mainly derived from rock salt or evaporite dissolution.All the major ions had good correlation with each other,and their sources were consistent.Atmospheric precipitation had little effect on the chemical composition of groundwater in the study area.The groundwater was mainly affected by evaporation and rock weathering.The main ion source in groundwater was greatly affected by the weathering and dissolution of silicate rock and evaporite rock.It was also affected by the dissolution of carbonate rock and cation exchange.

国家自然科学基金（41662016）;中国地质调查局西北地区主要城市地下水污染调查评价（1212011220982）