沋河流域下游水化学特征分析  

Analysis on Water Chemistry Characteristics in Downstream of the Youhe River Basin

作　　者：王晓艳[1,2] 蒋缠文[1,2] 刘丹[1,2] 

机构地区：[1]渭南师范学院农商学院,陕西渭南714099 [2]陕西省河流湿地生态与环境重点实验室,陕西渭南714099

出　　处：《渭南师范学院学报》2017年第4期38-43,共6页Journal of Weinan Normal University

基　　金：陕西省军民融合基金项目:秦岭黑河流域地表径流来源研究(16JMR13);渭南师范学院科研计划项目:基于环境同位素技术的秦岭黑河流域地表径流来源示踪研究(16ZRRC03);渭南市创新团队专项计划项目:秦东湿地资源开发与生态保护创新团队(2015TCTD-2)

摘　　要：在渭南沋河流域下游选取5个点进行采样,运用统计法、Gibbs图、阴阳离子三角图示法,对渭南沋河流域下游的主要阴阳离子、pH值、电导率EC和总可溶性固体TDS进行了综合分析。结果表明:所有样品的离子组成均为Ca^(2+)-HCO_3^-,呈弱碱性。河流流经区域的TDS和EC的均值分别为214.63mg/L和429.50μg/cm,pH值为7.79,各采样点离子平均质量浓度总和RKK>HX>LJ>CKK>HY。岩石风化作用是水化学组成的控制因素,整个沋河流域下游的水化学形成过程主要受碳酸盐和蒸发岩控制。To study the water chemistry characteristics in downstream of the Youhe River,we selected 5 sampling points（ RKK,HY,HX,L1 and CKK） to sample river water from output to Huayuan village in April,2016. Based on statistical method,the results of Gibbs distribution pattern and triangular diagrams of anions and cations,this paper makes further analysis about anions and cations,p H,conductivity EC and total soluble solids TDS. The results show that the hydrochemical type of the Youhe River basin is Ca-（2＋）-HCO_3--. The river water is slightly alkaline. The average of TDS and EC were 214.63 mg / L and 429.5 μg / cm,respectively. The mean ionic value is RKKHXL1CKHY. Gibbs distribution pattern shows that the major controlling factor of runoff is rock weathering. With the analysis of triangular diagrams of anions and cations,we conclude that the source of the main ions are carbonate-evaporite weathering.

关 键 词：水化学类型 离子浓度 岩石风化 TDS 沋河 

分 类 号：P342[天文地球—水文科学]