Two Methods For Measuring Internal Velocity Of
Debris Flows In The Laboratory
Author(s)
F. Wei, H. Yang, K. Hu, Y. Hong & X. Li
Abstract
The velocity of debris flows is a very important parameter for debris flow
research and design of debris flow control works. The velocity of debris flows
can be divided into surface velocity and internal velocity. The surface velocity of
debris flows has been researched widely while the internal velocity is minimally
researched because there is no available method for measuring internal velocity.
In this paper, we developed two methods for measuring the internal velocity of
debris flows in laboratory. One method is using impact pressure detecting, and
the other is using shear forces detecting. In the former method, the internal
velocity is calculated by the impact pressure detected by pressure sensors
according to the relationship between velocity and kinetic pressure. In the later
method, the internal velocity is calculated using the distance between two
detecting sections and the time difference between the two waveforms of shear
forces measured at both sections.
Keywords: debris flow, internal velocity, impact force, shear force, flume
experiment.
1 Introduction
In the research of dynamics of debris flow and design of debris flow control
works, the velocity of debris flows is a key parameter. The velocity of debris
flows can be classified into surface velocity (at free surface of debris flow) and
internal velocity (inside the debris flow). The surface velocity has been
researched widely because it is easy to measure in the field and laboratory.
Arattano and Marchi used ultrasonic sensors to detect the times of debris flow
Keywords
debris flow, internal velocity, impact force, shear force, flume
experiment.
Related Book
Other papers in this volume
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