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-P02] Spatial distribution of land surface displacements in the crater of Tateyama Midagahara Volcano using high-definition topographic data

*早川 裕弌1楠本 成寿2小倉 拓郎3,4 (1.北海道大学地球環境科学研究院、2.富山大学大学院理工学研究部、3.東京大学新領域創成科学研究科、4.北海道大学大学院環境科学院)

キーワード:地上レーザ測量、UAS-SfM、点群

Detailed monitoring of land surface displacements is crucial for the assessment of activities of a volcano, especially in its crater area. Close-range remote sensing of high-definition topographic data is advantageous in the detection of centimeter-scale ground-surface displacements in a wide spacial extent, whereas the conventional leveling method is capable of detecting millimeter-scale displacements along a measurement line. We investigated the spatial distribution of land surface displacements in the Jigoku-Dani crater area of Mt. Tateyama Midagahara Volcano in Toyama Prefecture, central Japan by high-definition topographic measurements including terrestrial laser scanning and unmanned aerial vehicle-based structure-from-motion photogrammetry. The annual measurements were performed for three years (2015 to 2017). The range of uplift detected by terrestrial laser scanning corresponds with that by leveling. Together with the analytical results of the leveling data, the spatial pattern of the uplift suggests the extent of an underground pressured zone to cause the exhumation. For the prediction of the volcanic activities, further monitoring is required to reveal the spatiotemporal patterns of the displacements.