| Abstract: | Temporally and spatially varying pore-fluid pressures exert strong controls on debris-flow motion by mediating internal and basal friction at grain contacts. We analyze these effects by deriving a one-dimensional model of pore-pressure diffusion explicitly coupled to changes in debris-flow thickness. The new pore-pressure equation is combined with Iverson‘s (1997) extension of the depth-averaged Savage-Hutter (1989, 1991) granular avalanche equations to predict motion of unsteady debris-flow surges with evolving pore-pressure distributions. Computational results illustrate the profound effects of pore-pressure diffusivities on debris-flow surge depths and velocities. ?? 2003 Millpress,. |
| Genre: | Conference Paper |
| ProdID: | 70025378 |
| Citation Author: | Savage, S. B.; Iverson, R. M. |
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| Citation Editor: | Rickenmann D.Chen C.L. |
| Citation End Page: | 514 |
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| Citation Language: | English |
| Citation Larger Work Title: | International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings |
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| Citation Number Of Pages: | 12 |
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| Citation Search Results Text: | Surge dynamics coupled to pore-pressure evolution in debris flows; 2003; Conference Paper; International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings; Savage, S. B.; Iverson, R. M. |
| Citation Start Page: | 503 |
| Citation Volume: | 1 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Surge dynamics coupled to pore-pressure evolution in debris flows; 2003; Conference Paper; International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings; Savage, S. B.; Iverson, R. M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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