天山哈密榆树沟流域春洪期水化学特征及其控制因素研究  

River water chemical characteristics and controls during the spring flood period in Yushugou Bbasin,Hami,Eastern Tianshan Mountains,China

作　　者：王晓艳[1] 李忠勤[1,2] 周平[1] 若孜罕.塔依尔 高鹏 

机构地区：[1]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 [2]西北师范大学地理与环境科学学院,甘肃兰州730070 [3]哈密哈密水文水资源勘测局,新疆哈密839000

出　　处：《干旱区地理》2014年第5期922-930,共9页Arid Land Geography

基　　金：国家自然科学基金面上项目(41471058);国家自然科学基金面上项目(41471058)

摘　　要：2013年4月26日-5月2日,逐日采集哈密榆树沟流域下游榆树沟水文站点的河水样。综合运用描述性统计、相关性分析、Gibbs图、阴阳离子三角图示法,对主要的化学离子、pH值、电导率EC、总可溶性固体TDS进行了分析。结果表明:榆树沟流域春洪期径流水体呈弱碱性;HCO3-、Ca2+是阴、阳离子中最主要的离子,Ca2+质量浓度占阳离子总数的74.31%,HCO3-质量浓度占阴离子总数的82.07%;水化学类型为HCO3--Ca2+;径流中主要离子组成、TDS、EC、pH值受即时径流量的调节作用不大,岩石的风化作用是水化学主要离子来源的主要控制因素,其中主要来源于石灰岩等碳酸盐岩的风化。The main ion composition of water is the indicator which can show the lithology, climate, ecological envi- ronment of the through area. This has been widely used to identify the basic process that controls the chemical com- position of the water. The research about ion chemistry characteristics and spatial distribution can be used to deter- mine the relationship of the rivers solute geochemical sources with regional natural conditions. There are very few re- ports about chemical characteristics and controls at Hami Yushugou Basin, Xinjiang, China. And water resource from this river is very important for production and life of Hami. An analytical study of hydrochemical characteristics and controls of the runoff during the spring flood period at Hami Yushugou Basin were carried out in this study. In order to investigate the diurnal changing characteristics of river water chemical composition, water samples were col- lected at Yushugou Hydrometric Station from April 26 to May 2,2013. To analyze the major chemical ions, pH, con- ductivity EC, total soluble solids TDS, tools including the descriptive statistics, correlation matrices, Gibbs Figure, triangular diagrams of anions and cations were employed. The results showed that the average pH value in runoff was alkaline （8.04） in spring flood period in Yushugou Basin. EC value in runoff samples ranged from 84.5 to 168.4 μ S·cm-1. Ca2＋ was the dominant cation, and HCO3- was the dominant anion. The average value of TDS was 68.84 mg·L-l, belonging to the weak water salinity. Ca2＋ and HCO3- concentration account for 74.31% and 82.07% of cat- ions and anions, respectively. The anionic mass concentration sequence was HCO3-〉SO42-〉Cl-〉NO^-3, and that of cat- ionic was Ca2＋〉Na＋〉Mg2＋〉K＋. The hydrochemical type of Yushugou basin is HCO^-3-Ca2＋. The major ion composition, TDS, EC, pH value in runoff were little affected by instant water discharge. Affected by river gradient and flow velocity, the trends of the daily average value of ion and the da

关 键 词：EC和TDS 离子浓度 岩石风化 榆树沟流域 

分 类 号：P342[天文地球—水文科学]