淮北市城郊区浅层地下水水岩作用及水环境质量评价

Water Rock Interaction and Water Environment Quality Evaluation of Shallow Groundwater in Suburban Areas of Huaibei City

摘要: 为进一步了解皖北地区浅层地下水水岩作用及水环境质量，本文在安徽省淮北市城郊区采集了43件浅层地下水样品，基于Piper图、Gibbs图，离子比例系数和WQI饮用水评价等方法，对研究区内浅层地下水水岩作用、水化学特征和饮用水质量进行评价和分析。结果表明：浅层地下水pH值变化范围为6.97~8.19，平均值为7.37，属于弱碱性水。TDS值范围为222.00~842.00 mg/L，平均值为421.3 mg/L，为淡水。水化学类型主要以HCO₃-Ca·Mg型为主。浅层地下水常规水化学组分与盐岩矿物、硫酸盐岩矿物、硅酸盐岩矿物的风化溶解作用和阳离子交替吸附作用有关。WQI的变化范围为20.00~71.13，平均值为36.53，表明浅层地下水水质良好，适宜居民饮用。

Abstract: In order to understand the hydrochemical processes and water environment quality of shallow groundwater in Huaibei City, Northern Anhui Province, forty-three groundwater samples were collected in the suburban area of Huaibei City. Based on the methods of Piper plot, Gibbs plot, ion ratio, and WQI, the hydrochemical characteristics and drinking water quality were evaluated and analyzed. The results indicate that the pH value ranges from 6.97 to 8.19, with an average of 7.37, indicating the samples are weak alkaline. The TDS value ranges from 222.00 to 842.00 mg/L, with an average of 421.30 mg/L, indicating these samples belong to the fresh water. The hydrochemical type of shallow groundwater is mainly HCO₃-Ca·Mg type. The main chemical components of shallow groundwater are related to the weathering and dissolution of salt rock minerals, sulfate rock minerals, and silicate rock minerals, as well as the cation alternating adsorption. The variation range of WQI is from 20.00 to 71.13, with an average value of 36.53, indicating that the shallow groundwater quality is good and suitable for residents to drink.