Author(s): Gordon G. D. Zhou; M. L. Fei; Q. C. Sun
Linked Author(s):
Keywords: Debris flow; Experiment; Deposition process; Solids segregation
Abstract: Debris flow is generally composed of a wide range of solid particles and viscous pore fluids. It flows at a high traveling velocity down a sloping channel. Interactions between solid and fluid phases affected by multiple parameters govern the rheological properties of debris flows. Study on the deposition process of hazardous geophysical flows (e. g., debris flows) is crucial for the hazard mitigation and prediction. In this study, large flume model tests of debris flows were conducted. The flow thickness, frontal velocity, solids concentration, and basal total/pore-water pressures of debris flows along the sloping channel were measured, and the deposition process of decelerated debris flows on the horizontal ground was monitored. Multiple surges and the grain-size distribution of debris mass in the deposition fan was measured and depicted. The flume model test results illustrate that reverse and longitudinal segregation in two directions occurs in the deposition process of granular debris flows.
Year: 2013