Eastern Siberia is characterized by widespread permafrost thawing and subsequent thermokarst development. Estimation of the impacts of the predicted rise in precipitation and air temperatures under climate change requires quantitative knowledge ab...
This study examines the characteristics of landforms affected by the 2011 tsunami along the rocky coasts of the Sanriku area in northeastern Japan. We use terrestrial laser scanning to take detailed topographic measurements of slopes near the coa...
Oliver Korup, Yuichi Hayakawa, Alexandru T. Codilean, Alexandru T. Codilean, Yuki Matsushi, Hitoshi Saito, Takashi Oguchi, Hiroyuki Matsuzaki
Earth-Science Reviews 135 1-16 Jan 2014 [Refereed]
Quantifying volumes and rates of delivery of terrestrial sediment from island arcs to subduction zones is indispensable for refining estimates of the thickness of trench fills that may eventually control the location and timing of submarine landsl...
OBANAWA Hiroyuki, S.HAYAKAWA Yuichi, SAITO Hitoshi, GOMEZ Christopher
Journal of the Japan society of photogrammetry 53(2) 67-74 May 2014 [Refereed]
In the last few years, SfM (Structure from Motion) based on photographs taken from UAV (Unmanned Aerial Vehicle) has attracted a tremendous amount of interest for the creation of DSM (Digital Surface Model) and other morphometric products. However...
Journal of Geography (Chigaku Zasshi) 120(4) 615-630 Aug 2011 [Refereed]
This study investigated the spatial distribution of heavy rainfall that enhanced the occurrence of potential landslide hazards throughout Japan during the period 2001-2008, using the Soil Water Index (SWI). We calculated SWI using a tank model, w...
Hydrological Research Letters 5 37-41 2011 [Refereed]
To quantitatively evaluate how different methods for creating 5 km mesh Radar/Raingauge-Analyzed Precipitation (R/A) affected annual precipitation, we compared three kinds of 5 km mesh R/A during 1991–2009 by devoting attention to the modification...
Geomorphology 118(1-2) 167-175 May 2010 [Refereed]
The empirical rainfall intensity and duration (I-D) threshold for the initiation of shallow landslide is newly defined for Japan where heavy rainfalls frequently occur during the East Asian summer monsoon season. The rainfall causes sediment-relat...
Geomorphology 109(3-4) 108-121 Aug 2009 [Refereed]
This paper proposes a statistical decision-tree model to analyze landslide susceptibility in a wide area of the Akaishi Mountains, Japan. The objectives of this study were to validate the decision-tree model by comparing landslide susceptibility a...
Journal of the Japan Landslide Society 44(1) 1-14 May 2007 [Refereed]
In this study, drainage basins with landslides in the Akaishi Mountains are estimated using the decision tree technique which is a kind of data mining technique. Decision tree technique is characterized by the estimation processes which are explic...
