Abstract:Groundwater and springs are important water resources for domestic and agricultural uses in the Aso caldera in the volcanic region of Kumamoto, Japan. In addition, some springs play the role of tourist attraction. Previous studies have reported high fluoride (F−) levels in these water bodies; however, these studies were conducted more than 20 years ago and did not study the factors controlling the F− concentration in detail. In this study, to understand F− concentration in recent years and the controlling fact… Show more
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