新疆叶尔羌河流域浅层地下水化学特征及形成机制  

Hydrochemical characteristics and formation mechanism of shallow groundwater in the Yarkant River Basin, Xinjiang

作　　者：林丽[1,2] 曾妍妍 周金龙[1,2] 李麟 谭鹏飞[1] LIN Li;ZENG Yanyan;ZHOU Jinlong;LI Lin;TAN Pengfei(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Hydrology and Water Resources Engineering Research Center,Urumqi 830052,China)

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]新疆水文水资源工程技术研究中心,乌鲁木齐830052

出　　处：《干旱区资源与环境》2020年第6期146-152,共7页Journal of Arid Land Resources and Environment

基　　金：新疆自治区自然科学基金项目(2019D01B18);新疆自治区高校科研计划项目(XJEDU2018Y020);国家自然科学基金项目(41662016);新疆农业大学校级大学生创新项目资助。

摘　　要：结合134组水样测试数据,综合采用数理统计法、图解法、离子比值法等,分析新疆叶尔羌河流域浅层地下水化学特征及形成机制。研究结果表明:浅层地下水是较高矿化度、高硬度的弱碱性水,潜水水化学类型以SO4型水为主,浅层承压水水化学类型以SO4·Cl和Cl·SO4型水为主。Gibbs图解法表明潜水主要受到岩石风化作用和蒸发浓缩作用的双重影响,浅层承压水主要受到岩石风化作用的影响。相关性分析和离子比值关系结果表明浅层地下水中离子主要来自岩盐、硫酸盐和硅酸盐等矿物的风化溶解。此外,氯碱指数法结果表明阳离子交换作用也是浅层地下水中化学组分形成的重要作用之一。Based on the test data of 134 groups of shallow groundwater samples,the hydrochemical characteristics and groundwater formation mechanism were analyzed by using mathematical statistics method,graphic method and ion ratio method in the Yarkant River Basin of Xinjiang.The results showed that shallow groundwater was weak alkaline with high salinity and high hardness.Unconfined groundwater was mainly SO4 type,shallow confined groundwater was SO4·Cl and Cl·SO4 type.Gibbs diagram showed that the unconfined groundwater was mainly affected by rock weathering and evaporation-concentration,and the shallow confined groundwater was mainly affected by rock weathering.The results of correlation analysis and ion ratio relationship showed that the hydrochemical components of shallow groundwater were mainly derived from dissolution of minerals such as halite,sulfate and silicate.In addition,the Chlor-alkali index indicated that cation exchange was also a major mechanism controlling the components of shallow groundwater.

关 键 词：浅层地下水 水化学特征 形成机制 叶尔羌河流域 

分 类 号：P641[天文地球—地质矿产勘探]