Runout Characteristics and Grain Size Distribution of Large-scale Debris Flows Triggered by Deep Catastrophic Landslides

• DOI: 10.13101/ijece.5.16
• Publication Date: 2013-08-16T23:17:48Z
• Authors: Yuki NISHIGUCHI; Taro UCHIDA; Nagazumi TAKEZAWA; Tadanori ISHIZUKA; Takahisa MIZUYAMA
• Keywords: Debris flow; Mudflow; Deposition

Deep catastrophic landslides (DCLs) sometimes lead to large-scale debris flows with serious impacts on human life and infrastructure. However, no adequate information about DCL-triggered flows, such as the topography of eroded deposited areas or grain size distribution, exist. We compiled published data obtained additional new for topographic characteristics distributions 10 recent in Japan. compared these previously small-scale steep-slope failures, flows. examined effects DCL volume erosion deposition due flow well distribution. The longitudinal gradient lower end area decreased increasing landslide volume, half material where was less than 2°. minimum section not affected by volume. found that travel distance flow, including might also be a function and/or triggered DCLs spanned more eight orders magnitude.