中文关键词新疆喀什三角洲水化学离子来源水化学演化水文地球化学模拟 英文关键词Kashgar River Delta in Xinjianghydrochemistryion sourceshydrochemical evolutionhydrogeochemical simulation

作者	单位	E-mail
魏兴	新疆农业大学水利与土木工程学院, 乌鲁木齐 830052 新疆水文水资源工程技术研究中心, 乌鲁木齐 830052	1035027480@qq.com
周金龙	新疆农业大学水利与土木工程学院, 乌鲁木齐 830052 新疆水文水资源工程技术研究中心, 乌鲁木齐 830052	zjzhoujl@163.com
乃尉华	新疆维吾尔自治区地质矿产勘查开发局第二水文工程地质大队, 昌吉 831100
曾妍妍	新疆农业大学水利与土木工程学院, 乌鲁木齐 830052 新疆水文水资源工程技术研究中心, 乌鲁木齐 830052
范薇	新疆农业大学水利与土木工程学院, 乌鲁木齐 830052 新疆水文水资源工程技术研究中心, 乌鲁木齐 830052
李斌	新疆维吾尔自治区地质矿产勘查开发局第二水文工程地质大队, 昌吉 831100

中文摘要 "水质型"缺水问题严重阻碍着新疆喀什地区经济的发展.为研究位于喀什地区西部的喀什三角洲地下水水化学特征及主要离子来源，于2016年6~10月采集地下水水化学样品402组，地下水氢氧同位素样品114组.综合运用数理统计、Gibbs图、离子比、Schoeller图和水文地球化学模拟等方法，分析了喀什三角洲地下水的水文地球化学特征，探讨了水化学演化规律及主要离子来源.结果表明：①该区地下水中阴离子以SO₄^2-为主，其次为Cl^-；阳离子以Na⁺为主，地下水类型以SO₄·Cl-Na型为主；②该区地下水离子组分受岩石溶滤作用和蒸发浓缩作用控制.水中离子主要来源于蒸发岩的溶解，其次为碳酸岩的溶解.河流冲积平原潜水受蒸发浓缩作用影响，承压水还受反向阳离子交换作用和混合作用影响；③沿地下水流向，地下水离子组分浓度呈递增趋势，岩盐、白云石和石膏发生溶解，方解石沉淀. 英文摘要 Pollution-induced water shortage problems have severely hindered the economic development of Kashi Prefecture in Xinjiang. In order to study the chemical characteristics and main ion sources of groundwater in the Kashgar River Delta of Western Kashi Prefecture, 402 groundwater samples and 114 groundwater hydrogen and oxygen isotope samples were collected and tested in June to October 2016. Based on the methods of mathematical statistics, Gibbs diagram, ion ratio, Schoeller diagram, and hydrogeochemical simulation, the hydrogeochemical characteristics of the groundwater were analyzed, and the hydrochemical evolution law and the main ion sources were discussed. The following results were noted. ①SO₄^2- was the main anion in the groundwater, followed by Cl^-. Na⁺ was the main cation, and the groundwater was mainly SO₄·Cl-Na type. ②The groundwater ion components were controlled by dissolution of rocks and evaporation. The groundwater ions were mainly derived from the dissolution of evaporites, followed by the dissolution of carbonates. Unconfined groundwater in the river alluvium plain was affected by evaporation, and the confined groundwater was affected by reverse cation exchange and mixing. ③Along the groundwater flow direction, the concentration of ion components in the groundwater increased. Halite, dolomite, and gypsum were dissolved, and calcite was precipitated.

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