新疆三塘湖地区地下水化学特征与水质评价  

Groundwater Chemical Characteristics and Water Quality Evaluation in Santanghu

作　　者：李全 李祥 白帅 苏巴提·阿不来提 甘乔侨 马婷[2] 黄佳昱 高歌 Li Quan;Li Xiang;Bai Shuai;Subati·Abulaiti;Gan Qiaoqiao;Ma Ting;Huang Jiayu;Gao Ge(Baicheng County unconventional energy Technology Development Co.,Ltd,Baicheng,Xinjiang,842300,China;Key Laboratory of Oil and Gas Fine Chemicals,Ministry of Education and Xinjiang Uygur Autonomous Region,Urumqi,Xinjiang,830017,China)

机构地区：[1]拜城县非常规能源科技开发有限公司,新疆拜城842300 [2]新疆维吾尔自治区石油天然气精细化工教育部重点实验室,新疆乌鲁木齐830017

出　　处：《新疆地质》2025年第1期157-163,共7页Xinjiang Geology

基　　金：新疆维吾尔自治区第一批“天山英才-优秀工程师”资助项目、新疆维吾尔自治区自然科学基金资助项目(2022D01F93)共同资助。

摘　　要：基于新疆三塘湖地区地下水水质数据,采用数理统计、Piper三线图、水岩模型、交替吸附作用及溶解性总固体(TDS)与主要离子相关性等方法对研究区内于2013年5月采集的28组潜水和5组承压水水化学特征进行分析,采用单指标评价法及综合质量评价法对研究区内地下水水质进行评价。结果表明,蒸发浓缩和岩石风化是该区地下水化学成分形成的主要原因。研究区内地下水化学类型主要分为3种类型:SO_(4)·Cl^(-)Na·Ca,SO_(4)-Ca·Mg和SO_(4)·Cl^(-)Na型,硅酸盐岩与蒸发岩盐的溶解是其主要离子来源;通过2种评价结果分析,研究区内地下水的TDS和各检测离子的质量浓度均超标(除NO_(3)^(-)外),与人为因素关系不密切。由于三塘湖地区在漫长的地质演化中,经历了多次沉积作用、构造运动和岩浆活动等,导致研究区内地下水水质总体较差。研究结果可为该区地下水开发利用及保护提供科学依据,也为该地区地质结构的演化提供了旁证。Based on the groundwater quality data of Santanghu area,28 groups of phreatic water and 5 groups of confined water samples in the study area were analyzed by mathematical statistics,Piper Trilinear Diagram,water-rock model,correlation between total dissolved solids and major ions,single index evaluation and comprehensive quality evaluation.The results show that the average pH value of groundwater in the study area is 8.51,which is recognized as a weakly alkaline water,and the average TH value is 436.04 mg/L,which is dominated by very hard water;The relationship between the mass concentrations of anions is SO_(4)2->Cl^(-)>HCO_(3)-,and the cations is K^(+)+Na^(+)>Mg^(2+)>Ca^(2+);Through the correlation calculation and regression analysis,TDS in this area is highly correlated with the mass concentration of cations K^(+)+Na^(+)and the anions Cl^(-),and weakly correlated with the mass concentration of Ca^(2+),reflecting that the groundwater in this area is mainly affected by evapotranspiration and concentration,which is dominated by the dissolution of evaporated saline rocks,and then by the weathering of rocks.According to Shukarev's classification,Piper Trilinear Diagram and alternate adsorption,there are three main types of groundwater in the study area,which are SO_(4)·Cl^(-)Na·Ca,SO_(4)-Ca·Mg and SO_(4)·Cl^(-)Na types.The source of ions is mainly silicate rock with evaporite salt dissolution,and the water chemistry is significantly affected by evaporative crystallization,and to a lesser extent by rock weathering,which is not closely related to alternate cation adsorption;The results of the two evaluations are analyzed to show that the mass concentrations of TDS and each of the ions detected in the study area exceed the standards(except for NO_(3)^(-))and are not closely related to anthropogenic factors.During the long and complex geohistorical evolution of the Santanghu area,several tectonic movements,sedimentation and magmatic activities had been experienced,resulting in overall poor groundwater quality in th

关 键 词：三塘湖 地下水 水化学特征 Piper三线图 水质评价 

分 类 号：P345[天文地球—水文科学] P641.12[天文地球—地球物理学]