宁夏南部清水河平原地下水水化学同位素特征演化研究  

Research on the Evolution of Groundwater Hydrochemical and Isotope Characteristics in Qingshuihe Plain, South of Ningxia

作　　者：于艳青[1] 余秋生[1] 薛忠岐[1] 尹秉喜[1] 郭永锋[1] 

机构地区：[1]中国地质大学(北京)

出　　处：《勘察科学技术》2005年第4期42-44,57,共4页Site Investigation Science and Technology

基　　金：地质大调查项目"宁南水资源综合评价与合理开发利用"(编号:DKD2002005-1)。

摘　　要：利用水化学、同位素调查的方法,对宁南清水河平原地下水的水化学演化规律进行了研究。结果表明:清水河平原地下水水化学类型具有明显的水平分带性,地下水化学类型由补给区的重碳酸盐型水向排泄区的硫酸盐氯化物型水转变,地下水矿化度自南而北逐渐增高。经地下水D、18O、T同位素特征分析,平原地下水补给主要来源于大气降水补给,地下水化学特征的演化受控于溶滤、蒸发及地层含盐量。The hydrochemical and isotope charateristics of groundwater in Qingshuihe plain was studied by the methods of hydrochemical and isotope investigation. The outcome shows that： the distribution of groundwater hydrochemical characteristic bears a character of horizontal zonality, the chemical type of groundwater changes from bicarbonate in recharge area to sulphate and halide in drainage area, TDS of groundwater grows up from south to north in this plain. The isotopic characteristics of groundwater indicate it is mainly come from modem precipitation. The evolution of groundwater chemical composition is mainly affected by water-rook interaction and evaporation.

关 键 词：清水河平原 地下水水化学特征 演化规律 地下水矿化度 水化学类型 特征演化 同位素 清水河 平原 宁夏南部 

分 类 号：P641.3[天文地球—地质矿产勘探] S156.41[天文地球—地质学]