Debris flows are a common natural disaster in mountainous areas and often cause severe casualties and property loss. Debris-flow run-out effects analysis can provide an idea of the spatial risks posed to the downstream area of a debris flow, which is extremely important for local populations’ lives, disaster mitigation and planning the layout of economic construction. The objective of this stud...

The Mount Meager volcanic complex in southern British Columbia is snow and ice covered and has steep glaciated and unstable slopes of hydrothermally altered volcanic deposits. Three large-volume (>108 m3) volcanic debris flow deposits derived from the Mount Meager volcanic complex have been identified. The volcanic debris flows travelled at least 30 km downstream from the volcanic complex and i...

A numerical model is developed for the simulation of debris flow in landslides over a complex three dimensional topography. The model is based on a lattice, in which debris can be transferred among nearest neighbors according to established empirical relationships for granular flows. The model is then validated by comparing a simulation with reported field data. Our model is in fact a realistic...

During 29-31 January 2021 (austral summer), an extreme storm event triggered catastrophic debris flows in central Chile (33-36°S). At small and precarious rural settlements the commune of Malloa Chile, where by a hailstorm. Hail-debris flows, with hail volume concentration near 10%-20%, caused 200 injured individuals 73 damaged houses. In this study, hail-debris modelled using FLO2D. software, ...

Using a numerical simulation method based on physical equations to obtain the debris flow risk range is important for local-scale assessment. While many models have been used reproduce processes after occurrence, their predictability in potentially catastrophic scenarios has mostly not evaluated detail. Two single-phase and two two-phase were Wayao event 2013. Then 2020 was predicted by four wi...

Landslides are prevalent natural disasters in mountainous regions worldwide, and the debris flows that accompany them considered a significant cause of topographical changes. Landslide-debris property damage casualties if they occur densely populated areas, such as cities rural areas. Sediments entering dam or reservoir lake can compromise integrity functionality facility. To minimize damage, t...

Debris flows pose severe hazards to communities in mountainous areas, often resulting in the loss of life and property. Helping debris-flow-prone communities delineate potential hazard zones provides local authorities with useful information for developing emergency plans and disaster management policies. In 2003, the Soil and Water Conservation Bureau of Taiwan proposed an empirical model to d...

Debris flows are gravity-driven mass movements that common natural hazards in mountain regions worldwide. Previous work has shown measurements of ground vibrations capable detecting the timing, speed, and location debris flows. A remaining question is to what extent additional flow properties, such as grain-size distribution depth can be inferred reliably from seismic data. Here, we experimenta...

The present study describes entrainment characteristics of bed material into debris flow, based on flume tests, numerical and dimensional analyses. Flume tests are conducted to investigate influences of bed sediment size on erosion rate by supplying debris flows having unsaturated sediment concentration over erodible beds. Experimental results show that the erosion rate decreases monotonically ...