“双源”分布区地下水质量及生态价值评估  

Assessment of groundwater quality and ecological value in “Double source” Distribution Area

作　　者：徐庆勇 林健 江岳 杨庆 王晓红 XU Qingyong;LIN Jian;JIANG Yue;YANG Qing;WANG Xiaohong(Beijing Institute of Hydrogeology and Engineering Geology(Beijing Institute of Geo-Environment Monitoring),Beijing 100195,China;Information Center of Beijing Geology Prospecting and Developing Bureau,Beijing 100195,China)

机构地区：[1]北京市水文地质工程地质大队(北京市地质环境监测总站),北京100195 [2]北京市地质矿产勘查开发局信息中心,北京100195

出　　处：《水资源与水工程学报》2019年第4期63-70,共8页Journal of Water Resources and Water Engineering

基　　金：北京市自然科学基金项目(8181002);北京市财政项目(PXM2017_158305_000006);原环境保护部项目(1741STC61512)

摘　　要：以“双源”分布区为研究区域,分析风险源是否对地下水源水质造成影响,表明该区域地下水所具有的重大生态价值,为地下水污染治理及对保护的更加高度关注提供依据和支撑。利用地下水实测数据,采用标准中规定的方法,评价了研究区地下水质量和非常规指标检出状况,并计算超标指标超标倍数;采用模型评估地下水调节径流、涵养水源的生态价值。总体评价结果表明,研究区地下质量较差,以IV类为主,主要超标指标是砷、锰和铁,其中铁超标倍数最大,达36.9倍;非常规指标中检出率较高的指标是荧蒽、二氯甲烷、萘和蒽,但检出浓度均为微量或痕量,地下水供水安全未受到威胁;分区评价结果表明,各子区超标指标与检出的非常规指标(萘除外)均不是风险源特征指标,研究区水源基本未受到化工类工业风险源的影响。地下水调节径流、涵养水源的生态价值巨大,不容忽视。This study analyzed the risk source affecting the quality of underground water source in“double source”distribution area to indicate the significant ecological value of groundwater and to provide basis and support for groundwater pollution control and more attention to protection.Based on the groundwater monitoring data and by using the method specified in the standard,groundwater quality and detection of unconventional indicators were evaluated,and multiples of the overproof indicators were calculated,ecological value of groundwater of regulating runoff and conserving water was evaluated.The results showed that groundwater quality in the study area is poor,mainly with a IV grade,and the metals As,Mn,and Fe are mainly exceeded indicators,among them,iron exceeded the standard by 36.9 times.The concentrations of fluoranthene,dichloromethane,naphthaline and anthracene all within the standards,indicating the water supply safety of groundwater were not threatened.The results showed that exceeded and detection indicators(except naphthalene)in the each of subarea aren't characteristic indicators of pollution sources,water resources in the study area aren't influenced by chemical industries pollution sources.Ecological value of groundwater of regulating runoff and conserving water is huge,and it should not be overlooked.

关 键 词：化工类工业风险源 “双源”分布区 地下水质量 生态价值评估 农村饮用地下水 

分 类 号：X824[环境科学与工程—环境工程]