摘要
本文综合怀柔应急水源地开采期间开采量、水质等系列动态监测资料,对水源地地下水水质变化规律以及引起水质变化的主要因素进行了分析。随着地下水的开采,地下水中硬度、溶解性总固体、硝酸盐等含量呈现逐年增高的趋势,其中,浅层地下水年际增速较快,深层地下水年际增速较缓。另外,利用同位素分析技术识别地下水中NO3-污染的来源,分析结果表明,NO3-主要来源是人工化肥和中水/污水,经土壤微生物硝化作用转为硝酸盐。针对怀柔应急水源地水质变化情况,为保障供水安全,提出了改善地下水水质的对策。
his paper analyzed the water quality variation laws and the main factors based on the serried of dynamic monitoring exploitation and water quality data. With the exploitation of underground water, hardness, total dissolved solids and nitrate of groundwater increases year by year, with rapid growth of shallow groundwater and moderate annual growth rate of deep groundwater. In addition, the sources of NO3- pollution in groundwater is identified by isotope analysis technology. The results show that the main sources of NO3- are artificial fertilizers and reclaimed water/sewage, which is converted to nitrates with nitrification by soil microorganisms. According to the variation of water quality in Huairou emergency water source area, the countermeasures to improve the water quality of groundwater are put forward to ensure the safety of supplying water.
出处
《城市地质》
2016年第1期57-61,共5页
Urban Geology
关键词
怀柔应急水源地
地下水开采
水质变化
Huairou emergency water source area of Beijing
Groundwater exploitation
Water quality variation
