日本地球惑星科学連合2019年大会

講演情報

[E] ポスター発表

セッション記号 M (領域外・複数領域) » M-TT 計測技術・研究手法

[M-TT47] 人新世における高精細地形・地球物理データの活用

2019年5月27日(月) 13:45 〜 15:15 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:早川 裕弌(北海道大学地球環境科学研究院)、楠本 成寿(富山大学大学院理工学研究部(都市デザイン学))、Gomez Christopher(神戸大学 海事科学部 海域火山リスク科学研究室)

[MTT47-P04] Ground Penetrating Radar Imaging of Moisture and Water movement in volcanic soil

*Christopher A Gomez1 (1.Kobe University Faculty of Maritime Sciences Volcanic Risk at Sea Research Group)

キーワード:Ground Penetrating Radar, Soil moisture content, Volcanic material

Ground Penetrating Radar is a non-invasive subsurface method that provides results on the dielectric properties of the ground between 0 and 30 m on average in sediments. Working from sediments from Mt Unzen in Japan, tests over the moisture content and the air content change were conducted on the material in order to infer further data during field measurement. The GPR used in the survey is a Ramac Mala mounted with an antenna of 800 Mhz and a stack signal over time. The data were processed using Matlab using data filtering and time-depth conversion, and calculation of the dielectric properties variations. The signal analysis shows that the velocity does change over time depending on the moisture content and the change in air/void ratio. For a given homogeneous material, like at volcanoes, multiplying such analysis is a step forward the development of relatable tables for various environments.