新疆南部典型地区地下水中氟的分布特征及其富集因素分析

Distribution characteristics and enrichment factors of fluorine in groundwater in typical areas of southern Xinjiang

以新疆南部典型平原区地下水中的氟为研究对象,依据地下水污染调查数据,分析研究区地下水中氟的分布特征及富集因素.结果表明,水平上,焉耆盆地平原区地下水中氟的含量总体上呈南高北低,若羌-且末地区和叶尔羌河流域平原区地下水中的氟含量呈北高南低;垂向上,焉耆盆地平原区深层承压水的氟含量高于浅层承压水和潜水中的氟含量,若羌-且末地区和叶尔羌河流域平原区浅层承压水的氟含量高于深层承压水和潜水中的氟含量.地下水中的氟主要来源于地层中的含氟矿物;氟的富集主要受气候、地形、水文地质条件以及水化学环境的影响.

Based on groundwater pollution survey data, this paper analyzed the distribution characteristics and enrichment factors of fluorine in typical areas of southern Xinjiang. Results showed that the fluorine concentration gradually increased from the north to the south in Yanqi basin,and the fluorine concentration gradually increased from the south to the north in RuoqiangQiemo region and Yarkant River basin,horizontally. Vertically,the fluorine concentration in deep confined groundwater was higher than that in shallow confined groundwater and unconfined groundwater in Yanqi basin,and the fluorine concentration in shallow confined water was higher than that in deep confined groundwater and unconfined groundwater in Ruoqiang-Qiemo region and Yarkant River basin. Fluorine in groundwater primarily came from the fluorine minerals in stratum in southern mountainous area. In addition, the climate, topography, hydrogeology condition and groundwater chemical environment are the major factors of groundwater fluorine enrichment.