Abstract
Landslides appear in many different forms and sizes, from devastating debris flows to overly optimistic sand castles. A familiar and well-documented feature of all landslides is the positive correlation between volume and landslide runout. Larger landslides have a greater potential to reach farther. Here we explore the low volume limit and find a surprising negative correlation between volume and landslide runout. A decrease in volume leads to an increase in runout. In a series of experiments we systematically vary the landslide volume to reveal a transition between these two regimes.
Highlights
Introduction z fast cameraAs Albert Heim observed as early as 1932 [1], landslides can sometimes travel many times further than would be naively predicted from an energy balance between the initial gravitational potential energy and dissipation by sliding friction
Regardless, all evidence suggests that long runouts only occur in the limit of large landslide volumes
Rocks, or snow, the similarity between these geophysical flows and the flow of sand has led to the practice of laboratory experiments with flows of sand or glass beads being used as analogs of much larger geophysical flows such as landslides
Summary
As Albert Heim observed as early as 1932 [1], landslides can sometimes travel many times further than would be naively predicted from an energy balance between the initial gravitational potential energy and dissipation by sliding friction. These long runouts are the source of much HCM H. The released grains slide down a flat glass plate inclined at an an- Whether it be debris, rocks, or snow, the similarity between these geophysical flows and the flow of sand has led to the practice of laboratory experiments with flows of sand or glass beads being used as analogs of much larger geophysical flows such as landslides. The difference in height and horizontal position for the front position is given by H and L respectively
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