摘要
大荔县为地方性氟中毒病高发区,主要因长期饮用氟含量高的地下水所致。通过分析大荔县269件地下水样品中氟含量,查明地下水氟含量为0.01～11.8mg/L,均值为1.91mg/L,氟含量高于1.0mg/L的水样样本达70.6%。调查分析发现,大荔县地下水氟含量在空间分布上具有北高南低的特征,富集最严重的区域出现在渭河二、三级阶地的东端,高氟地下水区域占到全区总面积的63%。大荔县丰富的氟源、特定的地形地貌、干燥的气候环境以及缓慢的地下水力更替过程是造成地下水中氟富集的主要因素。
Dali county is the high incidence area of fluorin illness, mainly because of drinking ground water with high concentration of fluorin in a long time. The content range of fluorin in ground water is 0. 01- 11.8mg/L based on the analysis of ground water samples in Dali county. The distributing character of fluorin in ground water is higher at north than that at south. The most fluorin-enriched areas are distributed in east of second and third terraces in Wei river, with the high-fluorin area accounting for 63 % of the total area. The main factors for enrichment of fluorin are the abundant sources of fluorin, the specific landform and physiognomy, the dry climate, and the slow exchanging process of ground water.
出处
《西北地质》
CAS
CSCD
2009年第3期102-108,共7页
Northwestern Geology
基金
国土资源大调查项目"陕西省大荔县高氟地下水调查评价"(编号:1212010634713)
关键词
氟
地下水
影响因素
大荔县
fluorin
ground water
effective factors
Dali county
