Hydrochemical study at Mizunami Underground Research Laboratory (MIU); Consideration of variation of groundwater chemistry related to the shafts construction

Hagiwara, Hiroki  ; Mizuno, Takashi   

This report describes the results of investigations on geochemical characteristic of groundwater in the 07MI07 borehole. In this investigation, it was cleared that chemical components of groundwater, such as sodium, chlorine show the feature that the concentration decreases with far from shaft. It was affected by shaft drilling.