Three-Dimensional Topography of Debris-Flow Fan
Publication: Journal of Hydraulic Engineering
Volume 132, Issue 3
Abstract
Study on debris-flow fan configurations lays the groundwork for hazard zone mappings of debris flow disasters. This paper aims to identify the morphological similarity of debris-flow fans based on a series of laboratory experiments and field investigations. The maximum length , width , and thickness of debris-flow fans are adopted as the characteristic parameters in the analysis of morphological similarity of debris-flow fans. This analysis demonstrates that the nondimensional longitudinal and transverse profiles of debris-flow fans can be described by Gaussian curves, while a circular curve can be used to fit the nondimensional plan form of the debris-flow fans. By combining the three nondimensional curves mentioned above, the volume ∀ of a debris-flow fan can be related to the maximum length , maximum width , and maximum thickness by , via an empirical coefficient . The parameter is approximately 0.275 for a natural stony debris-flow fan and greater than 0.275 for a natural mud debris-flow fan. In addition, the three-dimensional topography of debris-flow fans can be easily derived based on the parameters , , and using three morphological similarity formulae.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 132 • Issue 3 • March 2006
Pages: 307 - 318
Copyright
© 2006 ASCE.
History
Received: Jul 20, 2004
Accepted: Apr 1, 2005
Published online: Mar 1, 2006
Published in print: Mar 2006
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