天山哈密榆树沟流域地下水化学特征及其来源  

Chemical characteristic and sources of the groundwater in Yushugou River basin,Hami,Tianshan Mountains

作　　者：王晓艳[1] 李忠勤[2] 蒋缠文[1] WANG Xiao-yan LI Zhong-qin JIANG Chanwen(College of Chemistry and Environment, Weinan Normal University / Key Laboratory for Ecology and Environment of River Wetlands in Shaanxi Province, Weinan 714000,Shaanxi,China State Key Laboratory of Cryosphere Sciences/Tianshan Glaciological Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, Gansu , China)

机构地区：[1]渭南师范学院化学与环境学院/陕西省河流湿地生态与环境重点实验室,陕西渭南714000 [2]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室/天山冰川站,甘肃兰州730000

出　　处：《干旱区地理》2017年第2期313-321,共9页Arid Land Geography

基　　金：国家重大科学研究计划项目(超级973项目)(2013CBA01801);渭南师范学院科研计划项目(16ZRRC03;16ZRRC02)

摘　　要：根据天山哈密榆树沟流域地下水的pH值、总可溶性固体(TDS)、电导率(EC)和主要化学离子的测定,运用综合特征描述法、三角图示法、相关性分析和主要离子比值法,探讨了流域地下水的水化学特征及其形成原因。分析结果表明:地下水的pH值为中性略偏碱性;阳离子中Ca^(2+)质量浓度含量最高,阴离子中HCO_3^-浓度最高,阳离子质量浓度序列为Ca^(2+)>Na^+>Mg^(2+)>K^+,阴离子质量浓度序列为HCO_3^->SO_4^(2-)>Cl^->NO_3^-;该流域地下水主要离子类型为HCO_3^--Ca^(2+);TDS含量分别为104.33 mg·L^(-1)和99 mg·L^(-1),属于弱矿化度水;地下水中离子组成主要受碳酸盐风化作用的影响。The groundwater chemical characteristics for river basin have important influence on river and river basin water resources utilization. Through the research of groundwater chemical characteristics in Yushugou River basin,Hami,Tianshan Mountains,Xinjiang,China,this paper aims to：（1）reveal the interaction mechanism of the groundwater environment;（2）discuss the evolution rule of groundwater in river basin;（3）provide basic data and data accumulation for the water chemistry research,water resources comprehensive utilization and protection of the ecological environment in the study area. According to the measurement of p H,TDS,EC and major ion composition of groundwater in Yushugou River basin,by combining comprehensive character description method,triangular diagrams of anions and cations,correlation analysis and main ion ratio method,this paper discussed the chemical characteristics and the reasons of groundwater. The results show that the groundwater is weak alkaline. The most main anion and cation are HCO3^- and Ca^2＋,respectively. The concentration orders of cations and anions are Ca^2＋Na^＋Mg^2＋K^＋ and HCO3^- SO4^2-Cl^-NO3^-,respectively. The hydrochemical type of groundwater is H2CO3-Ca^2＋. The average value of TDS is 104.33 mg·L^-1 in spring flood period and 99 mg·L^-1 in summer flood period,belonging to the weak water salinity. The ions composition in groundwater is mainly influenced by carbonate weathering. The correlations between TDS and Cl^-,SO4^2-,NO3^-,Ca^2＋,Mg^2＋ and Na^＋in groundwater during spring flood period are very high,which shows that the salinity level in groundwater is mainly controlled by the six kinds of ions during the period. During summer flood period,the relationships between pH and Mg^2＋,K^＋ and TDS both present negative correlation. This indicates that dissolved concentration of magnesium salt and potassium salt in this period influence the groundwater p H value in some degree. We can judge the basin rarely influenced by agricultural and industrial

关 键 词：地下水 水化学类型 离子来源 水岩作用 榆树沟流域 

分 类 号：P641.3[天文地球—地质矿产勘探]