托克逊两河流域地下水化学组分来源及同位素指示作用分析
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摘要
通过对托克逊两河流域32组水样中的化学成分及环境同位素进行测定,运用聚类、Piper三线图、Gibbs图、离子比例系数法对化学组分来源进行分析,并对研究区水环境同位素特征进行分析,确定该区域地下水的水化学作用及组分来源。结果表明:沿阿拉沟渠从出山口山前砾质洪积平原→细土平原→盐沼平原过渡区地下水由HCO_3型→HCO_3·SO_4型、SO_4·HCO_3型→SO_4·CL型;地下水化学作用同时受蒸发浓缩作用、溶滤作用和阳离子交替吸附作用的影响,地下水化学组分来自盐类矿物的溶解;地下水δ~(18)O平均值为-0.889%,δD平均值为-5.668%,浅表层水δ~(18)O平均值为-0.938%,δD平均值为-6.005%,山区降水经二次转化对地下水补给产生一定的影响,远离当地大气降水线的水样受补给源和人工开采的影响。
The chemical composition and environmental isotopes in 32 groups of water samples in the Toksun river basin were determined, and the chemical components sources were analyzed by using clustering, Piper three-line maps, Gibbs diagrams and ion-proportionality coefficients method, and the isotopic characteristics of water environment in the study area were also analyzed to determine the hydrochemistry and composition of groundwater in the area. The results showed that the groundwater along the Aragou river system from the gravel diluvial plain in front of the mountain mouth to the fine soil plain to the salt marsh plain is from HCO_3 type to HCO_3·SO_4 type, SO_4·HCO_3 type and SO_4·CL type; the groundwater chemistry is also influenced by evaporation and concentration, leaching and cation exchange adsorption; the chemical composition of groundwater comes from the dissolution of salt minerals; the average value of groundwater δ~(18)O is-0.889%, the average value of δD is-5.668%, the average value of shallow surface water δ~(18)O is-0.938%, and the average value of δD is-6.005%; the precipitation in mountainous areas has a certain influence on the groundwater recharge through the secondary transformation. The water samples far away from the local atmospheric precipitation line are affected by the supply source and artificial mining.
The chemical composition and environmental isotopes in 32 groups of water samples in the Toksun river basin were determined, and the chemical components sources were analyzed by using clustering, Piper three-line maps, Gibbs diagrams and ion-proportionality coefficients method, and the isotopic characteristics of water environment in the study area were also analyzed to determine the hydrochemistry and composition of groundwater in the area. The results showed that the groundwater along the Aragou river system from the gravel diluvial plain in front of the mountain mouth to the fine soil plain to the salt marsh plain is from HCO_3 type to HCO_3·SO_4 type, SO_4·HCO_3 type and SO_4·CL type; the groundwater chemistry is also influenced by evaporation and concentration, leaching and cation exchange adsorption; the chemical composition of groundwater comes from the dissolution of salt minerals; the average value of groundwater δ~(18)O is-0.889%, the average value of δD is-5.668%, the average value of shallow surface water δ~(18)O is-0.938%, and the average value of δD is-6.005%; the precipitation in mountainous areas has a certain influence on the groundwater recharge through the secondary transformation. The water samples far away from the local atmospheric precipitation line are affected by the supply source and artificial mining.
引文
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[6] 杜明亮,吴彬,李英连.吐鲁番盆地水环境同位素分析与应用[J].干旱区资源与环境,2018,4(32):177-182.
[7] 张明江,苏明磊,胡伏生,等.吐鲁番盆地典型剖面的地下水径流特征[J].新疆地质,2016,34(3):418-421.
[8] 卢颖,郭建强.基于多元统计方法的张掖盆地地下水化学特征分析[J].干旱区资源与环境,2016,5(30):129-134.
[9] 冯欣,张亚哲.深州地区地下水离子比例系数分析研究[J].中国农村水利水电,2014,(4):18-24.
[10] 栾凤娇,周金龙,贾瑞亮,等.新疆巴里坤-伊吾盆地地下水水化学特征及成因[J].环境化学,2017,36(2):380-389.
[11] 王璐晨. 鄂尔多斯盆地北部浅层地下水水化学特征及形成机制分析[D].长春:吉林大学,2017.
[12] 王冬,候光才,赵振宏. 鄂尔多斯盐海子地下水水流系统划分——来自水化学方面的探讨[J].干旱区资源与环境,2014,28(12):122-127.
[13] 吴海霞. 托克逊县地下淡水分布特征及成因[J].西部探矿工程,2016,(6):99-101.
[14] 周文.鄯善县地下水系统演化规律研究[D].乌鲁木齐:新疆农业大学,2013.
[15] 邓启军,李方红,李伟,等.蒲阳河流域地下水水化学及同位素特征[J].水文地质工程地质,2017,44(2):8-14.
[16] 王雅男,肖长来,赵琳琳,等.吉林市地区地下水化学时空变化特征分析[J].节水灌溉, 2014,(7):38-41.
[17] 丰亚萍,刘志辉,郭小云.呼图壁河流域地下水水化学特征分析[J].中国农村水利水电,2017,(4):72-76.
[18] Salih LACHACHE, Mohamed NABOU, Touhami MERZOUGUUI, ect. Hydrochemistry and origin of principal major elements in the groundwater of the Béchar-Kénadsa basin in arid zone, South-West of Algeria[J].Journal of water and land development,2018,36(Ⅰ-Ⅲ):77-87.