新疆吐-哈盆地地下水水文地球化学特征及形成作用
Hydrogeochemical Characteristics and Formation of Groundwater in Tu Ha Basin, Xinjiang

摘要： 新疆吐-哈盆地水资源严重缺乏，地下水是当地主要的水资源，探讨该地区地下水水文地球化学特征对区域地下水资源开发利用与保护具有重要意义。通过运用阴阳离子Piper三线图、氢氧稳定同位素、Gibbs图以及离子相关关系分析的方法，探讨了该地区地下水化学特征及其形成作用。结果表明：吐-哈盆地地下水的补给来源主要以大气降水为主，排泄以蒸发为主；溶滤作用、蒸发浓缩作用对地下水化学组分的形成具有主导作用；沿地下水流动方向水化学类型由Cl·SO4-Na型逐渐演变为Cl-Na型，水化学组分变化规律具有较好的一致性并且浓缩现象比较明显。
Abstract: Due to the serious shortage of water resources in TuHa Basin, Xinjiang, groundwater has become the main water resources; therefore, studying hydrogeochemical characteristics of the groundwater is very important for the development and protection of regional groundwater. By using the methods of Piper diagram, stable hydrogen and oxygen isotopes, Gibbs graph and ion correlation analysis, the hydrochemical characteristics and evolution were analyzed in the paper. The results showed that the recharge source of groundwater mainly came from the atmospheric precipitation and the evaporation was the main discharge way in TuHa Basin. The groundwater chemical compositions were mainly formed by lixiviation and evaporation. Hydrochemical type gradually evolved from the Cl·SO4Na to ClNa along the groundwater flow path. The evolution of the groundwater chemical components had high consistency and obvious enrichment phenomenon in the study region