冬季沁河(河南段)水化学特征

研究冬季沁河(河南段)的水化学特征为沁河水环境保护以及水资源利用提供依据。采集沿沁河及黄河9个断面样品并对样品的主要阴、阳离子和重金属进行检测,在此基础上运用水化学分析和因子分析法分析了沁河的主要水化学特征。结果表明:沿水流方向沁河取样断面由上到下水化学类型由Ca2+-SO42-+HCO3-型转变为Ca2+-HCO3-型;钙离子占阳离子总量51%,碳酸氢根离子占阴离子总量51%。黄河的水化学离子组成与沁河有较大区别,主要体现在钠离子和氯化物。沁河各点处的硝酸盐含量基本一致,平均为15.34mg/L(以NO3-计);氨氮浓度沿沁河径流路径呈上升趋势,平均浓度为1.42 mg/L(以NH3-N计)。冬季沁河(河南段)的水化学类型主要受控于自然因素,沁河水体中的硝酸盐主要来自地下水,氨氮主要来源于人类排放的污废水。

Hydrochemistry characteristics of Qin River (Henan section) in winter

Research on the hydrochemistry characteristics of Qin River(Henan Province) in winter can provide a guidance for water environment protection and water resources utilization.So water samples were collected from 9 sampling points at Qin River and Yellow River and tested main ions and heavy metal.The paper analyzed the hydrochemistry characteristics by using the water chemistry and factor analysis methods.The results show that along the flow path,the style of hydrochemistry changes from Ca2+-SO42-+HCO3-to Ca2+-HCO3-in Qin River.Ca2+ account for 51% of the total cations and HCO3-for 51% of the total anions.There is a great difference between Yellow River and Qin River and mainly reflect in Na+ and Cl-.The nitrate concentration of Qin River is not change very much,the average concentration of nitrate is 15.34mg/L(NO3-).And it showed a rising trend of ammonia concentration along flow path of Qin River,the average concentration of ammonia was 1.42 mg/L(NH3-N).Therefore,the style of hydrochemistry is controlled by nature in Qin River(Henan) in winter.Nitrate of Qin River is main from groundwater and ammonia is main from industrial wastewater and domestic sewage.