河西走廊平原区地下水中氟的富集规律及成因探讨

河西走廊平原区北部及部分山前地段浅层地下水氟含量高,以该水为饮用水源的当地居民氟中毒病较为严重。平原区地下水氟含量在平面上由南到北呈现出从低氟水到高氟水的区域性水平分带规律;在垂向上,细土平原高氟水带浅层水氟含量较高,下部分布质与量均佳的中低氟承压水,呈现为上高下低的规律。平原区周围含氟矿物与氟矿物及深层循环地下水为氟的主要物质来源,地下水的补给、径流与排泄条件,干旱气候,封闭的北部低洼地形及水化学环境等综合因素促成了氟的富集。

A discussion of the enrichment and formation of fluorine in groundwater in the plain of Hexi Corridor

The contents of fluorine is high in the groundwater at the northern of plaint area of Hexi corridor.Fluorine poiness is the serous problem in the local people who drinking the high contents of fluorine in the groundwater.The contents of fluorine in the groundwater lead a regional horizontal zoning regulation of decreasing from high in the south to lower in the north.At the vertical direction,contents of fluorine in the phreatic groundwater is higher in the lower reaches plain;where below it is the low to mi...