新疆巩乃斯河水化学分析

Hydro-chemical analysis of Kunes River in Xinjiang

通过对伊犁河支流巩乃斯河河水取样分析,结果表明：巩乃斯河河水阴离子中HCO3-占优势,阳离子中Ca^2＋占主要地位。主要离子含量表现为阴离子HCO3^-〉C l^-〉SO4^2-;阳离子Ca^2＋〉Na^＋ ＋ K^＋〉Mg^2＋。巩乃斯河河水均属于HCO3-Cl-Ca-Na型水。河水pH为7.56-8.01;矿化度为80-155 mg/L;总硬度为0.620-1.446 mmol/L;河水总碱度为0.778-1.676 mmol/L。另外,对离子浓度的空间变化及离子的来源分析研究表明,巩乃斯河流域的地形,地貌及气候的差异决定了河水主要离子浓度、pH和矿化度自河流上游至下游,基本呈现先逐步降低后显著升高的趋势;巩乃斯河河水主要离子来源于河水对基岩的溶滤作用,同时钠长石斑岩及人类活动所产生的物质也是主要离子的来源之一。

Hydro-chemical investigations were carried out in Kunes River,Xinjiang.It was found out that among major anions,HCO-3 was the dominant anion;Ca^2＋ was firstly in importance of all the cations.Chemical analysis of the water showed that the mean concentration（in mmol/L） of the anions was in the order HCO3^-〉Cl^-〉SO4^2-,while that for cations was Ca^2＋〉Na^＋ ＋ K^＋〉Mg^2＋.All of the investigated water samples presented the same chemical facies（HCO3-Cl-Ca-Na）.And water pH ranged from 7.56-8.01,mineralization degree ranged from 80-155 mg/L,hardness ranged from 0.620-1.446 mmol/L,and alkalinity ranged from 0.778-1.676 mmol/L.In addition,the spatial changes and the general origin of the main ions were also discussed and analyzed.It showed that along Kunes River,the concentration of the main ions,pH and mineralization reduced gradually firstly,and then increased obviously from upstream zone to downstream zone,which were depended on the differentiations of landform and climate in Kunes River basin.According to the analysis,it was found out that the main ions were generally from what water leach form bedrock.In addition,albite porphyry and the offal from human activities were also the origins.