Laboratory studies of subaqueous debris flows by measurements of pore-fluid pressure and total stress

Trygve Ilstad; Jeffrey G. Marr; Anders Elverhøi; Carl B. Harbitz

doi:10.1016/j.margeo.2004.10.016

Laboratory studies of subaqueous debris flows by measurements of pore-fluid pressure and total stress

Trygve Ilstad, Jeffrey G. Marr, Anders Elverhøi, Carl B. Harbitz

St. Anthony Falls Laboratory

Research output: Contribution to journal › Article › peer-review

91 Scopus citations

Abstract

A set of laboratory experiments on subaqueous debris flows is reported where total stress as well as pore pressure transducers were mounted in the bed. Sediment texture ranging from clayey (viscoplastic) to sandy (granular) were used in the experiments, in order to investigate changes in pressure evolution. The pressure readings confirm earlier studies suggesting that the front of the subaqueous clayey debris flow is hydroplaning on a thin layer of water, which causes low bed friction. Fronts of sandy debris flows show a fluidized head where bed friction is minimal.

Original language	English (US)
Pages (from-to)	403-414
Number of pages	12
Journal	Marine Geology
Volume	213
Issue number	1-4
DOIs	https://doi.org/10.1016/j.margeo.2004.10.016
State	Published - Dec 15 2004

Bibliographical note

Funding Information:
This research was carried out with financial support from the Research Council of Norway, Submarine Mass Wasting—Rheology, Flow Behaviour and Deposition Geometry (133975/431), the EU-project COSTA-contract no. EVK3-CT-1999-00006, the US Office of Naval Research and the International Centre for Geohazards, Norway. This is publication number 57 of the International Centre for Geohazards. The experiments could not have been performed without help from the laboratory staff and students at St. Anthony Falls Laboratory, University of Minnesota. In particular, G. Parker is acknowledged for his valuable contributions during planning as well as execution of the experiments. Thanks to the staff at the Geotechnical Department of the Norwegian University of Science and Technology for valuable help with the pressure transducers and filters. Help from D. Issler with setting up the experiment and for his useful comments on the article was greatly appreciated. The manuscript benefited from careful reviews by K. Høeg and B.D. Bornhold.

Keywords

debris flow
flow behaviour
gravity flow
hydroplaning
laboratory experiment
pore pressure measurements

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abstract = "A set of laboratory experiments on subaqueous debris flows is reported where total stress as well as pore pressure transducers were mounted in the bed. Sediment texture ranging from clayey (viscoplastic) to sandy (granular) were used in the experiments, in order to investigate changes in pressure evolution. The pressure readings confirm earlier studies suggesting that the front of the subaqueous clayey debris flow is hydroplaning on a thin layer of water, which causes low bed friction. Fronts of sandy debris flows show a fluidized head where bed friction is minimal.",

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note = "Funding Information: This research was carried out with financial support from the Research Council of Norway, Submarine Mass Wasting—Rheology, Flow Behaviour and Deposition Geometry (133975/431), the EU-project COSTA-contract no. EVK3-CT-1999-00006, the US Office of Naval Research and the International Centre for Geohazards, Norway. This is publication number 57 of the International Centre for Geohazards. The experiments could not have been performed without help from the laboratory staff and students at St. Anthony Falls Laboratory, University of Minnesota. In particular, G. Parker is acknowledged for his valuable contributions during planning as well as execution of the experiments. Thanks to the staff at the Geotechnical Department of the Norwegian University of Science and Technology for valuable help with the pressure transducers and filters. Help from D. Issler with setting up the experiment and for his useful comments on the article was greatly appreciated. The manuscript benefited from careful reviews by K. H{\o}eg and B.D. Bornhold.",

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Laboratory studies of subaqueous debris flows by measurements of pore-fluid pressure and total stress

Abstract

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Keywords

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