河南省兰考县中深层地下水分层质量评价

Evaluation of stratification quality of middle and deep groundwater in Lankao County,Henan Province

兰考县位于河南省东部,地处黄淮平原腹地,为典型的水质型缺水地区,区内广泛分布有咸水、微咸水、高硬度水、高氟水以及高铁高锰水等劣质地下水。对兰考县中深层地下水分层进行采样分析,基本查明了兰考县中深层地下水化学组分分布情况及质量状况,结果显示:兰考县中深层地下水质量总体较差,且具有明显的垂向分层性,不同深度的地下水质量不同,一般上部水质差,下部水质较好,随着深度的增加,水质有逐渐变好的趋势。500～600 m层段的地下水质量好,可作为兰考县中深层地下水的主要取水层段。评价结果为当地寻找安全的饮用地下水水源提供了基础依据。

Lankao County is located in the eastern part of Henan Province.It is located in the hinterland of Huanghuai Plain.It is a typical water-deficient water-deficient area.It is widely distributed with salt water,brackish water,high hardness water,high fluorine water and high-iron high-manganese water.Sampling and analysis of the middle and deep groundwater stratification in Lankao County basically identified the distribution and quality of the chemical composition of the middle and deep groundwater in Lankao County.The results show that the quality of the middle and deep groundwater in Lankao County is generally poor and has a vertical verticalscore.Layered,different depths of groundwater quality,generally upper water quality is poor,the lower water quality is better,with the increase of depth,the water quality has gradually become better.The groundwater quality of the 500-600 m interval is good and can be used as the main water abstraction section of the middle and deep groundwater in LankaoCounty.The evaluation results provide a basis for local search for safe drinking groundwater sources.