Japan Geoscience Union Meeting 2022

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[E] Oral

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

[A-HW23] Hydrology & Water Environment

Mon. May 23, 2022 1:45 PM - 3:15 PM 301B (International Conference Hall, Makuhari Messe)

convener:Keisuke Fukushi(Institute of Nature & Environmental Technology, Kanazawa University), convener:Takeshi Hayashi(Faculty of Education and Human Studies, Akita University), Shin'ichi Iida(Department of Disaster Prevention, Meteorology and Hydrology, Forestry and Forest Products Research Institute), convener:Sho Iwagami(Forestry and Forest Products Research Institute, Forest Research and Management Organization, National Research and Development Agency), Chairperson:Keisuke Fukushi(Institute of Nature & Environmental Technology, Kanazawa University), Takeshi Hayashi(Faculty of Education and Human Studies, Akita University), Shin'ichi Iida(Department of Disaster Prevention, Meteorology and Hydrology, Forestry and Forest Products Research Institute), Sho Iwagami(Forestry and Forest Products Research Institute, Forest Research and Management Organization, National Research and Development Agency)

1:45 PM - 2:05 PM

[AHW23-06] Clarifying origins and circulation regime of groundwater and geothermal fluid through geochemical indices and numerical simulation

★Invited Papers

*Koki Kashiwaya1, Shun Yamamoto2, Yoshiaki Kawashima3, Yudi Rahayudin4, Riostantieka Mayandari Shoedarto4, Yohei Tada1, Katsuaki Koike1 (1.Graduate School of Engineering, Kyoto University, 2.Graduate School of Advanced Integrated Studies in Human Survivability, Kyoto University, 3.Faculty of Engineering, Kyoto University, 4.Graduate School of Engineering, Kyoto University (Previous affiliation))

Keywords:Groundwater, Geothermal fluid, Environmental tracer, Isotope, Hydrogeological model, Numerical simulation

Understanding origins and circulation regime of water in shallow part of the earth is important for various issues relevant to sustainability of human society, such as groundwater use as a freshwater resource, utilization of geothermal energy and ground-source heat as renewable energies, and geological disposal of high-level radioactive waste. From these points of view, the authors conduct researches to elucidate origins and circulation regime of groundwater and geothermal fluid in both shallow and deep underground at home and abroad, through field survey and sampling, analyses of geochemical indices including environmental tracers, model development by combining geological information, and numerical simulation. This presentation shows the applied methods and obtained results in groundwater study in the Kyoto basin and geothermal study in four geothermal fields such as Wayang Windu and Patuha, around the Bandung basin in Indonesia, that aimed estimation of origins and spatial-temporal circulation regime of groundwater and geothermal fluid in those areas.