6:15 PM - 7:30 PM
[HTT31-P14] Estimation of groundwater flow at northern part of Mt. Bandai using the stable isotopes
Keywords:northern part of Me. Bandai, groundwater flow, stable isotopes
The Mt. Bandai which is an active volcano of the Quality period is located at Fukushima prefecture. There is a lot of groundwater storage in the mountain, because of volcanic geological permeable geology. The groundwater flow system at the northern part of Mt. Bandai has not been obvious. Then, the objective this study is to make clear the groundwater flow at the northern part of Mt. Bandai with using the water quality and stable isotopes.
As a result of the field observation and analysis of water chemistry and stable isotopes in spring water, river water and lake water, the following things became clear. 1) The EC and pH values has a negative correlation. 2) The water quality of lake water and spring water which are located near the Lake Akanuma are affected by the volcanic gas. 3) The Goshikinuma Lakes can be divided into some groups by the water quality. 4) It is considered that the spring water near the Lake Bentennuma is recharged near the Lake Akanuma. 5) The water quality of Lake Akanuma and neighboring lakes show the Ca-SO4 type, and their dissolved amounts are very high. 6) The Goshikinuma Lakes show the Ca-(Cl+SO4) type. 7) As a result of stable isotopes of Lake Akanuma, spring water and groundwater in the slope of northern part of Mt. Bandai, it is estimated that there is the same groundwater flow from Lake Akanuma to Goshikinuma Lakes.
As a result of the field observation and analysis of water chemistry and stable isotopes in spring water, river water and lake water, the following things became clear. 1) The EC and pH values has a negative correlation. 2) The water quality of lake water and spring water which are located near the Lake Akanuma are affected by the volcanic gas. 3) The Goshikinuma Lakes can be divided into some groups by the water quality. 4) It is considered that the spring water near the Lake Bentennuma is recharged near the Lake Akanuma. 5) The water quality of Lake Akanuma and neighboring lakes show the Ca-SO4 type, and their dissolved amounts are very high. 6) The Goshikinuma Lakes show the Ca-(Cl+SO4) type. 7) As a result of stable isotopes of Lake Akanuma, spring water and groundwater in the slope of northern part of Mt. Bandai, it is estimated that there is the same groundwater flow from Lake Akanuma to Goshikinuma Lakes.