Mean Velocity of Mudflows and Debris Flows
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Volume 136, Issue 9
Abstract
Models to predict mudflow and debris flow velocities are tested with 350 field and laboratory measurements. Overall, the turbulent model performs best while the dispersive stress approach only compares well with the measurements when the flow depth is less than 50 times the median particle diameter . The analysis of field measurements shows that the ratio of mean flow velocity to shear velocity is approximately 10, rarely exceeds 30, and increases slightly with relative submergence . The best overall agreement with laboratory and field velocity measurements is obtained with .
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Acknowledgments
The writer gratefully appreciates the open discussions on this complex topic of hyperconcentrations with H. Woo, J. S. O’Brien, J. Bradley, Y. Lan, J. Guo, and H. Hussain at Colorado State University, as well as with numerous international scientists including T. Takahashi, S. Egashira, and M. Hirano in Japan; W. Deyi and B. Wu in China; P. Coussot in France; A. Mainali and N. Rajaratnam in Canada; J. L. Lopez in Venezuela; A. Armanini in Italy; C. Ancey in Switzerland; D. Rickenmann in Austria; and many others. The writer greatly appreciated the constructive and detailed review comments of the anonymous journal reviewers.
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Information
Published In
Journal of Hydraulic Engineering
Volume 136 • Issue 9 • September 2010
Pages: 676 - 679
Copyright
© 2010 ASCE.
History
Received: Sep 4, 2007
Accepted: Mar 10, 2010
Published online: Mar 16, 2010
Published in print: Sep 2010
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