Japan Geoscience Union Meeting 2014

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Oral

Symbol A (Atmospheric, Ocean, and Environmental Sciences) » A-HW Hydrology & Water Environment

[A-HW25_2AM2] Isotope Hydrology 2014

Fri. May 2, 2014 11:00 AM - 12:45 PM 414 (4F)

Convener:*Masaya Yasuhara(Geological Survey of Japan, AIST), Kohei Kazahaya(Geological Survey of Japan, AIST), Shinji Ohsawa(Institute for Geothermal Sciences, Graduate School of Science, Kyoto University), Masaaki Takahashi(Geological Survey of Japan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST)), YUICHI SUZUKI(Faculty of Geo-Environmental Sience,Rissho University), Futaba Kazama(Social Cystem Engineering, Division of Engineering, Interdiciplinary Graduate School of Medical and Engineering, University of Yamanashi), Kazuyoshi Asai(Geo Science Laboratory), Chair:Kazuyoshi Asai(Geo Science Laboratory), Kazuhiro Amita(Department of Earth Science & Technology Faculty of Engineering and Resource Science Akita University)

11:30 AM - 11:45 AM

[AHW25-10] Estimation of recharge elevation and residence time for springs in Mt. Yotei

*Kazuyoshi ASAI1, Masaya YASUHARA2, Yukiko KUSANO3, Akihiko INAMURA2, Noritoshi MORIKAWA2, Hiroshi TAKAHASHI2 (1.Geo science laboratry, 2.AIST, 3.University of Tokyo)

Keywords:Mt. Yotei, spring, recharge elevation, residence time, transient tracer

Mt Yotei is a stratovolcano located on southwestern part of the Hokkaido. 17 springs with flow rate over 20 L/s distribute on the foot of the volcano body. We used the multi tracer method to estimate the recharge elevation and the residence time for the springs. Water samples were collected from 14 springs at August 2013, and were measured in stable isotope, Tritium, CFCs and SF6. In this presentation, we discuss the relationships between the scale of groundwater flow system and the hydrogeology of volcano body, based on the recharge elevation and the residence time for springs.