下辽河平原高氟地下水空间分布及成因分析  

Spatial distribution and genesis of the high-fluorine groundwater in the Lower Liaohe River Plain

作　　者：左锐[1,2] 谷鹏[1,2] 滕彦国[1,2] 王强[3] 王金生[1,2] 王膑[1,2] 

机构地区：[1]北京师范大学水科学研究院,北京100875 [2]地下水污染控制与修复教育部工程研究中心,北京100875 [3]环境保护部环境规划院,北京100012

出　　处：《水文地质工程地质》2015年第3期135-141,共7页Hydrogeology & Engineering Geology

基　　金：环保公益性行业科研基金重大项目(201009009);高等学校博士学科点专项科研基金(20130003120009)

摘　　要：以下辽河平原为研究区,共布设地下水取样点182个。样品组分分析显示区内局地氟离子超标现象严重。通过空间变异性分析,确定区内氟离子空间分布呈指数模型,受区域上中大尺度结构影响的变异较大,具有中等的空间相关性。通过水化学分析,区内高氟地下水主要分布于弱碱性条件、高重碳酸根型地下水中,在平原区与铅离子不呈比例关系。因子分析法提取出影响水化学类型的3个公因子,F1为蒸发浓缩因子,F2为p H及化肥污染因子,F3为重碳酸根及氟自然地质环境污染因子,分析确定区内高氟地下水的成因主要是平原区北部、大小凌河扇区富氟岩石的溶滤作用,通过迁移富集,在新民、凌海地区分布较高;蒸发浓缩及农业面源污染对高氟地下水作用不明显。In the Lower Liaohe River Plain,182 groundwater samples were sampled and the concentrations of fluorine ion and other general components were analyzed. The results show that groundwater with fluorine concentrations over the national standard occur in the local areas. Through spatial variability analysis,the presence of fluorine ion can be described with the exponential model,indicating that the occurrence of fluorine is mainly caused by large-scale regional factors with a moderate spatial similarity. Hydrochemical analyses show that the high-fluorine groundwater occurs in the areas with weak bases and high bicarbonate concentrations,and the fluorine concentrations are not inversely proportional to calcium contents. Factor analyses show that three factors are identified for the hydrochemical type. F1 is the evaporation condensation factor,F2 is the p H and agricultural pollution factor,and F3 is the bicarbonate and fluorine natural geological environment pollution factor. The cause of the high-fluorine groundwater is mainly the effect of dissolution at the northern area of the plain and in the Linghe River alluvial fan. Through transportation and enrichment,fluorine shows high concentration in the shallow groundwater in the Xinmin and Linghai area. However,evaporation and agricultural pollution have not obvious influence on the groundwater in the coastal plain.

关 键 词：氟 地下水 空间变异 因子分析 下辽河平原 

分 类 号：P641.11[天文地球—地质矿产勘探] P641.12[天文地球—地质学]