학술논문
Sediment Yields Triggered by Heavy Rainfall in July 2012 at Aso Volcano: Application of High-Definition Topography Data Using Unmanned Aerial Vehicles and Structure-from-Motion Multi-View Stereo Photogrammetry / 平成24年（2012年）7月九州北部豪雨に伴う阿蘇火山地域での土砂生産量の推定──UAVとSfM多視点ステレオ写真測量を用いた高精細地形データの活用──
Document Type
Journal Article
Author
Source
地理学評論 Series A / Geographical review of Japan series A. 2016, 89(6):347
Subject
Language
Japanese
ISSN
1883-4388
2185-1751
2185-1751
Abstract
We obtained ortho-rectified photographs with spatial resolutions of 0.04, and digital surface models (DSMs) with spatial resolutions of 0.10 and 0.16m. In the Saishigahana area, 26 landslides (19.87–4,593.85m2) occurred. The ratio of the total landslide area was 30% of the area. The estimated sediment yield reached 4.84 (±0.37)×105m3/km2. In the Sensuikyo area, 378 landslides (8.74–6,162.23m2) occurred. The estimated total landslide volume was 1.22 (±0.21)×105m3/km2. These sediment yields were 10 times greater than reported after the past rainfall-induced landslide events in the area. Our results demonstrated the potential sediment yields due to a single rainfall event at Aso Volcano.