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JDR Vol.17 No.5 pp. 654-662
(2022)
doi: 10.20965/jdr.2022.p0654

Paper:

Numerical Modeling of a Volcanic Hydrothermal System Based on Resistivity Structure

Yasuo Matsunaga and Wataru Kanda

School of Science, Tokyo Institute of Technology
2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan

Corresponding author

Received:
January 27, 2022
Accepted:
May 23, 2022
Published:
August 1, 2022
Keywords:
Kusatsu-Shirane, hydrothermal system, numerical simulation, resistivity
Abstract

Numerical simulation is a useful method for studying the magmatic-hydrothermal systems of volcanoes. However, no comprehensive scheme has been established for constructing subsurface permeability structures that have a significant impact on fluid flow within the volcano. In this study, as a first step to establishing such a scheme, numerical simulations of hydrothermal fluid flow incorporating the heterogeneous properties of the permeability structure were performed utilizing the resistivity structure observed at Kusatsu-Shirane Volcano, central Japan. Although the constructed permeability structure was relatively simple, the simulation results closely reproduced some observations, such as the broad resistivity structure and the distribution and discharge patterns of hot springs around the volcano. These results suggest that the uncertainty in generating permeability structures in hydrothermal fluid flow simulations can be greatly reduced by using resistivity structures.

Cite this article as:
Y. Matsunaga and W. Kanda, “Numerical Modeling of a Volcanic Hydrothermal System Based on Resistivity Structure,” J. Disaster Res., Vol.17, No.5, pp. 654-662, 2022.
Data files:
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Last updated on Dec. 01, 2022