【作者】 程凡； 李巧； 周金龙；

【Author】 CHENG Fan;LI Qiao;ZHOU Jin-long;College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University;College of Environmental Science,China University of Geosciences;Chinese Academy of Geological Sciences,Institute of Hydrogeology and Environmental Geology;

【机构】 新疆农业大学水利与土木工程学院； 中国地质大学环境学院； 中国地质科学院水文地质环境地质研究所；

【摘要】 研究区域地下水的水化学特征、水文地球化学过程对地下水开发利用及保护有着重要的意义。本文运用SPSS、AquaChem等软件和离子比值法结合水文地质条件分析了干旱气候条件下新疆淖毛湖盆地地下水化学特征、组分变化特征、水化学类型分布规律以及主要离子的来源和地下水形成过程中发生的水文地球化学作用。结果表明,研究区内潜水从一区→二区→三区,各组分含量逐渐升高,承压微咸水中所有组分,除了HCO₃^-含量均大于承压淡水;潜水水化学类型具有一定的水平分带性,潜水一、二、三区的水化学类型分别主要是HCO3-Ca、HCO3-Mg·Ca、HCO₃-Mg·Ca型水,承压淡水和微咸水水化学类型分别主要是HCO₃·SO₄-Ca·Na和SO₄·Cl-Na型;潜水一区→二区→三区水交替程度逐渐削弱,二区所受的溶滤作用比其他两个区域弱,三区所受的蒸发作用强于其他两个区域,水质朝成化方向发展,不是海相沉积水;承压水由西南向东北方向的水交替程度变弱,水质朝成化方向发展,不是海相沉积水,Na⁺来源于含岩盐地层。更多还原

【Abstract】 Study on regional groundwater chemical characteristics and hydrogeochemical processes are of great significance on exploitation and protection of groundwater.In this paper,the chemical properties,change characteristics,chemistry type distribution,provenances of main water ions and hydrogeochemical effects of groundwater are analyzed by means of SPSS,AquaChem and ion ratio method combined with the hydrogeological condition in Naomaohu Basin located in the Hami region,Xinjiang in northwest China under typical arid climate.The results show that:the content of each component gradually increased of unconfined water from district Ⅰ to district Ⅲ.All components in brackish confined water were higher than that in fresh confined water except for HCO₃^-.There is a horizontal zonation character in unconfined water chemistry type.Unconfined water chemistry type of district Ⅰ,Ⅱand Ⅲ are mainly HCO₃ — Ca,HCO₃ — Mg·Ca and HCO₃ — Mg·Ca,respectively.Fresh and brackish confined water chemical type are mainly HCO₃·SO₄ — Ca·Na and S04·CI — Na;respectively.Unconfined water alternating are gradually weakened from district Ⅰ to Ⅲ.Lixiviation of unconfined water in district Ⅱ is more weak than district Ⅰ and Ⅲ.Evaporation of unconfined water in district Ⅲ is more intense than district Ⅰ and Ⅱ.Confined water alternating is gradually weakened from southwest to northeast.Na⁺ in confined water came from formation which containing halite.Both Unconfined water and are not marine deposit and which quality have a trend of salinization.更多还原