Theoretical simulation and experimental study on biological weathering mechanism of the rock around coastal area in Yaeyama Islands

2017 Fiscal Year Final Research Report

• Project/Area Number: 26790079
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Computational science
• Research Institution: University of the Ryukyus
• Principal Investigator: MATSUBARA Hitoshi 琉球大学, 工学部, 准教授 (50414537)
• Research Collaborator: AYDAN Ömer 琉球大学, 工学部, 教授 (70194636) ; HIROSE Kosaburo 琉球大学, 工学部, 技術職員 ; EDO Taka-aki 琉球大学, 大学院・理工学研究科, 大学院生 ; IWASAKI Ryoma 琉球大学, 大学院・理工学研究科, 大学院生 ; OSHIRO Hayato 琉球大学, 大学院・理工学研究科, 大学院生 ; KAWAKAMI Ryogo 琉球大学, 大学院・理工学研究科, 大学院生 ; SAKIYAMA Hirotaka 琉球大学, 大学院・理工学研究科, 大学院生 ; DOHI Kakeru 琉球大学, 大学院・理工学研究科, 大学院生
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 岩の生物学的風化 / 八重山層群 / 琉球層群 / マルチフィジックスシミュレーション / 移流反応拡散方程式

Outline of Final Research Achievements

The microbial weathering in/on the outcrops around the coastal area in Yaeyama Islands was investigated. This work was based on the field survey and mathematical/numerical simulation in order to understand its physical, chemical and biological mechanism. As a result, we found some pealing weathering patterns by microorganism activities on the sandstone at Iriomote Island. Additionally, we found that the rock failures at the north part of Iriomote Island may be affected by a unique columnar weathering pattern between the Ryukyu group and Yaeyama group. Furthermore, we developed a mathematical model based on the advection-reaction-diffusion theory to simulate rock weathering phenomena by physical, chemical and biological reactions.

Free Research Field

地圏工学，計算力学