| Abstract: | Measurements of geotechnical properties of various poorly sorted debris-flow sediments and slurries (??? 32 mm diameter) emphasize their granular nature, and reveal that properties of slurries can differ significantly from those of compacted sediments. Measurements show that: (1) cohesion probably offers little resistance to shear in most debris flows under low confining stresses normally found in nature; (2) intrinsic hydraulic permeabilities of compacted debris-flow sediments vary from about 10-14-10-9 m2; permeabilities of ‘typical‘ debris-flow slurries fall toward the low end of the range; (3) debris-flow slurries are characterized by very large values of ‘elastic‘ compressibility (C approx. 10-2 kPa-1); and (4) hydraulic diffusivities of quasistatically consolidating slurries are approx. 10-4-10-7 m2/s. Low hydraulic diffusivity of debris slurries permits excess fluid pressure and low effective strength to persist during sediment transport and deposition. |
| Genre: | Conference Paper |
| ProdID: | 70020072 |
| Citation Author: | Major, J. J.; Iverson, R. M.; McTigue, D. F.; Macias, S.; Fiedorowicz, B. K. |
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| Citation End Page: | 259 |
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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: | 11 |
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| Citation Publisher: | ASCE |
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| Citation Search Results Text: | Geotechnical properties of debris-flow sediments and slurries; 1997; Conference Paper; International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings; Major, J. J.; Iverson, R. M.; McTigue, D. F.; Macias, S.; Fiedorowicz, B. K. |
| Citation Start Page: | 249 |
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| Citation Year: | 1997 |
| Type: | citation/reference |
| Text: | Geotechnical properties of debris-flow sediments and slurries; 1997; Conference Paper; International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings; Major, J. J.; Iverson, R. M.; McTigue, D. F.; Macias, S.; Fiedorowicz, B. K. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1997 00:00 -0600 |
| Publisher: | ASCE |
