宿州市城西水源地深层地下水水质及水化学成因分析

Analysis of Deep Groundwater Quality and Hydrochemistry Cause in Water Head Site at West Region of Suzhou City

为查明宿州市城西水源地下水水质情况和水化学控制因素,工作人员对区内22个深井进行了取样,测试了地下水中13种参数的浓度,通过对比国标分析了水质状况,并通过岩类判别图和氯碱指标探讨了水化学成因模式.研究结果表明水样中Cl^(-)、SO_(4)^(2-)、F^(-)、pH、TDS和耗氧量均可达到国标Ⅲ类水要求,且68%的地下水为Na-HCO_(3)型.此外,硅酸盐矿物的风化和阳离子交换作用是研究区地下水水化学组成的主要控制因素.

In order to find out the groundwater quality and hydrochemistry control factors of water head site at west region of Suzhou City,the staff have sampled 22 deep wells in this region,tested the concentration of 13 parameters in the groundwater,analyzed the water quality relative to the national standard,and explored the hydrochemistry cause mode through the rock class discrimination map and chlorine-alkali index.The study results show that the Cl^(-),SO_(4)^(2-),F^(-),pH,TDS and oxygen consumption in the water samples could meet the requirements of national standard for Class III water,and 68%of the groundwater is type Na-HCO_(3).In addition,weathering and cation exchange of silicate minerals are the main controlling factors for the hydrochemistry composition of groundwater in the study region.