呼和浩特市浅层地下水中氟离子空间变异性及分布特征

摘要

运用地质学统计理论分析呼和浩特市浅层地下水中氟离子浓度的空间变异性及其空间分布特征和变化规律.结果表明,呼和 浩特市浅层地下水氟离子含量存在超标现象,样本中氟浓度超标率为7％；地下中水氟离子含量呈现强变异性,并呈明显的各向同向性,且空间变异性是由大尺度的区域性因素引起的,随机因素影响不显著；全区大部分地下水中氟离子含量低于国家标准,仅有3％的区域超标,为高氟区.%Using geostatisties theory.The spatial variability.Spatial distribution characteristics and changing regularity of fluorine ion concert-trailon in the groundwater of Huhhot were analyzed.The results show that the fluorine content of shaUow groundwater in Huhhot is already 7%higher than the nationaI standard of drinking waler and shows remarkable spatial variability.Also,it SHOWS significant isotropic characteristicswithin a certain spatial range,which are mainly caused by large-seah regional factors rather than random factors.In Huhhot,majority of fluo-rine conlent in groundwater is lower than national standard of drinking water,only 3%of Whieh has exceeded national standard,thereby.De-fined as the high fluorine area.