红寺堡开发区地下水水化学特征及水质评价

目的]为查明宁夏红寺堡开发区地下水的水化学特征及水质现状,为地下水的合理开发利用提供依据。方法]对研究区15个水样点的水化学指标进行统计分析,较全面地研究了地下水的水化学特征,并运用模糊数学法进行了地下水水质评价。结果]研究区个别水样点的水化学指标满足生活饮用水卫生标准。地下水中色度、pH、H2SiO3的含量相对较稳定,而SO42-、CO32-、NH4＋-N和NO2--N的含量在空间存在较强的变异性。TDS总的变化趋势为自中部向东西两侧有增大的趋势,地下水化学类型以HCO3.Cl-Na、SO4.Cl-Na.Mg.Ca及SO4.Cl-Na.Mg型水为主。结论]地下水水质总体不容乐观,在海子塘及甜水河脑附近,水质较好,适合当地居民饮用,其余地区水质较差,可做工业和农业用水。

Hydro-chemical Characteristics of Groundwater and Its Quality Assessment in Hongsibu Development Zone

Objective] To inspect the hydro-chemical characteristics and quality status of groundwater in Hongsibu development zone of Ningxia,so as to provide reference for the reasonable exploitation of groundwater.Method] Hydro-chemical characteristics of 15 sampling sites in the study area were statistically analyzed,and the quality of groundwater was assessed by fuzzy mathematics.Result] Hydro-chemical characteristics of some sampling sites in the study area met the hygienic standard of living water.The concentrations of chroma,pH and H2SiO3 were relatively stable while the concentrations of SO42-,CO32-,NH4+-N and NO2——N showed strong spatial variation.TDS showed a gradually increasing trend from the middle to both sides.Hydro-chemical types were mainly HCO3·Cl-Na,SO4·Cl-Na·Mg·Ca and SO4·Cl-Na·Mg.Conclusion] The overall groundwater quality was not optimistic,the water was better and could be used for drinking around Haizitang and Sweetwater River,while the inferior water quality in other areas could only be adopted in industry and agriculture.