平度市地下水中氟的分布特征及其影响因素分析

以山东省平度市为例,通过实地调查和水样采集分析,对地下水中氟的分布特征及其影响因素进行了研究。该区地下水中F-含量范围为0.2～18.6mg/L,高氟水主要分布在西南部低洼地区;本区高氟水的形成受多种因素的影响,其中高氟地层是形成高氟水的物质基础,地貌、地下水补给、径流、排泄和水文地球化学条件是3个重要的控制因素;平度市东北部富氟地层经降水淋滤作用,径流补给西南部洼地区,地下水径流排泄不畅,加上适宜的水化学条件,造成了地下水中F-的累积和富集。

Research on Fluorine Distribution Characters of Groundwater and Their Influencing Factors in Pingdu City

In China,drinking-water type fluorosis is distributed widely.Based on field investigation and water sample collection,fluorine distribution characters of groundwater and their influencing factors in Pingdu of Shandong Province are studied in this paper.The results show that fluorine concentration of groundwater in Pingdu ranges from 0.2 mg/L to 18.6 mg/L and high fluorine groundwater is mainly distributed in low-lying areas,southwestern of Pingdu.High fluorine groundwater is affected by many factors,among which high fluorine strata are the foundation of high fluorine groundwater,and the following three factors are important for fluorine distribution:regional landform,groundwater recharge,run-off,discharge and hydro-geochemistry.Strata with high fluorine in the northeastern of Pingdu are leached by precipitation and flowed into southwestern low-lying areas,where fluorine is cumulated and enriched for groundwater discharged as well as suitable hydro-geochemistry condition.