The Distribution Characteristics And Genesis Of Fluoride Groundwater In The Hohhot-Baotou Sub-Basins

Fluorosis is one of the most typical endemia in northern China, especially in the eastern part of the Hohhot-Baotou sub-basins (including most of Tuoketuo County, east of Lingle and south of Tumotezuoqi).As a result,Finding out the spatial distribution of fluoride groundwater in this region and its causes is the foundation of which fluoride water is wiped out.It is studied that the different layers of groundwater quality analysis results and hydrogeology, geology, water chemistry type of comprehensive analysis of multiple factors through the most of Tuoketuo county, Lingle and Tumotezuoqi. At the same time,the spatial distribution of fluorine water in this region is identified.In addition, reasons for the formation of fluoride in confined and unconfined-groundwater is analysed.The study found that fluoride water had patchy distributed in low-lying place, including the center of Big Black River-Yellow River plain,in Hohhot-Baotou sub-basins.So what is to create favorable conditions for fluorine enrichment is that flat terrain, poor runoff conditions and relatively shallow burial depth. The fluoride ion content in the study area is generally between1.07and7.2mg/L, its formation is influenced by the climate, topography, geological environment, and many other types of water chemistry factors.Confined-fluoride water had patchy distributed in the most southern of the town and the center of plain. The most part of fluoride water content is between1and4mg/L, even the highest point is12.7mg/L.Areas with fluoride content has flat terrain and poor runoff. The sediment with fluoridated mineral leaching and hydrolysis migrated into groundwater,therefore water enrichment occurred during the migration.