Long-term fluctuations in trancient tracers in spring water from Mt. Ontake

Kazuyoshi Asai; Kazumi Asai

Presentation information

[J] Poster

A (Atmospheric and Hydrospheric Sciences ) » A-HW Hydrology & Water Environment

[A-HW24] Isotope Hydrology 2024

Fri. May 31, 2024 5:15 PM - 6:45 PM Poster Hall (Exhibition Hall 6, Makuhari Messe)

convener:Masaya Yasuhara(Rissho Univ.), Kazuyoshi Asai(Geo Science Laboratory), Takashi Nakamura(International Research Center for River Basin Environment, University of YAMANASHI), Koki Kashiwaya(Graduate School of Engineering, Kyoto University)

5:15 PM - 6:45 PM

[AHW24-P06] Long-term fluctuations in trancient tracers in spring water from Mt. Ontake

*Kazuyoshi Asai¹, Kazumi Asai¹ (1.Geo Science Laboratory)

Keywords:Ontake volcano, spring, CFCs, SF6, tritium, groundwater age

The authors have been conducting a survey of spring water at Ontake Volcano for 20 years. In this presentation, we will report on long-term changes in trancient tracers of spring water. Regarding long-term trends, 3H showed little fluctuation, CFCs showed a slight decrease, and SF6 showed a clear increase. This result reflects the variation in the input concentration of each tracer and the short residence time of the spring water.