鄂尔多斯白垩系盆地地下水矿化度和主要离子浓度的分布规律

Study on distribution law of TDS and main ion concentration in groundwater in the Ordos Cretaceous Artesian Basin

摘要: 文章在对鄂尔多斯白垩系地下水盆地1124件地下水化学样品进行分析的基础上,总结出了研究区浅、中、深三个不同循环深度地下水中矿化度和主要离子浓度的分布规律。总体上,白垩系盆地地下水具有盆地北区矿化度和主要离子浓度较低、淡水发育,盆地南区矿化度和主要离子浓度较高、微咸水和咸水发育的分布特点。盆地北区地下淡水主要分布在地表分水岭两侧的浅、中层地下水中和安边—东胜梁—四十里梁地表分水岭以东的无定河—乌兰木伦河地下水系统中。盆地南区除罗汉洞含水岩组地下水以淡水为主外,环河和洛河含水岩组中主要分布大面积的微咸水和咸水。

Abstract: The distribution law of TDS and main ion concentration in groundwater with three circulating depths of shallow,middle and deep level has been studied in the Ordos Cretaceous Artesian Basin by 1124 hydrochemical samples.On the whole,TDS and main ion concentration in groundwater in the north of the basin are lower than those in the south of the basin.And fresh water is more rich in the north of the basin than that in the south.Fresh water in the north of the basin distributed mainly in shallow and...