Friction in debris flows: inferences from large-scale flume experiments
- By:
- Richard M. Iverson and Richard G. LaHusen
- Edited by:
- Shen Hsieh WenSu S.T.Wen Feng
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Abstract
A recently constructed flume, 95 m long and 2 m wide, permits systematic experimentation with unsteady, nonuniform flows of poorly sorted geological debris. Preliminary experiments with water-saturated mixtures of sand and gravel show that they flow in a manner consistent with Coulomb frictional behavior. The Coulomb flow model of Savage and Hutter (1989, 1991), modified to include quasi-static pore-pressure effects, predicts flow-front velocities and flow depths reasonably well. Moreover, simple scaling analyses show that grain friction, rather than liquid viscosity or grain collisions, probably dominates shear resistance and momentum transport in the experimental flows. The same scaling indicates that grain friction is also important in many natural debris flows.Additional publication details
- Publication type:
- Conference Paper
- Publication Subtype:
- Conference Paper
- Title:
- Friction in debris flows: inferences from large-scale flume experiments
- ISBN:
- 0872629201
- Issue:
- pt 2
- Year Published:
- 1993
- Language:
- English
- Publisher:
- Publ by ASCE
- Publisher location:
- New York, NY, United States
- Larger Work Title:
- Proceedings - National Conference on Hydraulic Engineering
- First page:
- 1604
- Last page:
- 1609
- Conference Title:
- Proceedings of the National Conference on Hydraulic Engineering
- Conference Location:
- San Francisco, CA, USA
- Conference Date:
- 25 July 1993 through 30 July 1993