Velocity of Debris Flow Determined by Grain Composition
Publication: Journal of Hydraulic Engineering
Volume 146, Issue 8
Abstract
Velocity is one of the most important parameters of debris flows, and it is usually calculated using Manning formula in hydraulics, mostly ignoring the granular effects due to flow materials. This study proposes a method in term of grain composition of debris flow, incorporating the physical effects of grain on roughness. It is found that the Manning resistance coefficient can be well related to the grain size distribution (GSD) and thus the method is expected to have a wide application. A new formula incorporating the influence of granular effects is built based on observation data of debris flows in Jiangjia Gully (JJG), China, and then it is tested by data from debris flows in other regions.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available in a repository online in accordance with funder data retention policies. (http://nsl.imde.ac.cn/document/ziyuanfw/ziyuanfw.asp)
Acknowledgments
This work is supported by the Key International S&T Cooperation Projects (grant number 2016YFE0122400), the Strategic Priority Research Program of the Chinese Academy of Sciences (grant number XDA23090202), the Natural Science Foundation of China (41772343), the Open Fund of State Key Laboratory of Geohazards Prevention and Geoenvironment Protection (SKLGP2017K013), and the Chinese Academy of Sciences and Organization Department of Sichuan Provincial Party Committee “Light of West China” Program (the key control techniques of glacial debris flow along the Sichuan–Tibet Railway).
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Published In
Journal of Hydraulic Engineering
Volume 146 • Issue 8 • August 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Dec 4, 2018
Accepted: Dec 12, 2019
Published online: May 31, 2020
Published in print: Aug 1, 2020
Discussion open until: Oct 31, 2020
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