Numerical simulation of mud-rich subaqueous debris £ows on the glacially active margins of the Svalbard^Barents Sea
Seismic images and sediment core data from the Bear Island and Isfjorden fans localized along the Svalbard^ Barents Sea continental margin, reveal an interesting depositional system consisting of stacked debris flow lobes. The frequent release of debris flows was associated with large volumes of sed...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.568.5992 2023-05-15T15:38:48+02:00 Numerical simulation of mud-rich subaqueous debris £ows on the glacially active margins of the Svalbard^Barents Sea Je¡rey G. Marr A Anders Elverh$i B Carl Harbitz C Jasim Imran D Peter Har A The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.568.5992 http://folk.uio.no/anelverh/Papers/Marr_et_al_Numerical_simulation_of_mud_rich_subaqueous_debris_flows_ the_Svalbard_Barents_Sea.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.568.5992 http://folk.uio.no/anelverh/Papers/Marr_et_al_Numerical_simulation_of_mud_rich_subaqueous_debris_flows_ the_Svalbard_Barents_Sea.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://folk.uio.no/anelverh/Papers/Marr_et_al_Numerical_simulation_of_mud_rich_subaqueous_debris_flows_ the_Svalbard_Barents_Sea.pdf debris £ow gravity £ow hydroplaning modelling rheology submarine text 2002 ftciteseerx 2016-01-08T12:22:47Z Seismic images and sediment core data from the Bear Island and Isfjorden fans localized along the Svalbard^ Barents Sea continental margin, reveal an interesting depositional system consisting of stacked debris flow lobes. The frequent release of debris flows was associated with large volumes of sediment rapidly delivered to the shelf break during periods of maximum glaciation. The compositions of the lobes for both fans are similar, consisting of mainly clay and silt. The data show, however, a dramatic difference in runout distances for the two areas. Isfjorden debris lobes are 10^30 km in length whereas Bear Island lobes are 100^200 km in length. Even more intriguing is the fact that the large runout distances on the Bear Island fan occurred on slopes less than 1 ‡ whereas the Isfjorden fan flows occurred on slopes greater than 4‡. Depth-averaged non-linear one-dimensional equations for balance of mass and linear momentum are applied to simulate the subaqueous debris flow. The equations are solved by the numerical model BING, describing the flow as a visco-plastic Bingham fluid. The model is employed to study the effect yield strength, viscosity and bathymetry have on debris flow runout. The study shows that the large runout distances can be achieved on the Bear Island fan by visco-plastic flows with sufficiently low yield strength. High yield strength sediments require an additional mechanism, such as hydroplaning, to reach measured runout distances. Most importantly, this study shows the necessity of good rheological measurements for accurate numerical modeling of subaqueous debris flows. 9 2002 Elsevier Science B.V. All rights reserved. Text Barents Sea Bear Island Isfjord* Isfjorden Svalbard Unknown Svalbard Barents Sea Bear Island ENVELOPE(-67.250,-67.250,-68.151,-68.151) Bingham ENVELOPE(-63.400,-63.400,-69.400,-69.400) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
debris £ow gravity £ow hydroplaning modelling rheology submarine |
spellingShingle |
debris £ow gravity £ow hydroplaning modelling rheology submarine Je¡rey G. Marr A Anders Elverh$i B Carl Harbitz C Jasim Imran D Peter Har A Numerical simulation of mud-rich subaqueous debris £ows on the glacially active margins of the Svalbard^Barents Sea |
topic_facet |
debris £ow gravity £ow hydroplaning modelling rheology submarine |
description |
Seismic images and sediment core data from the Bear Island and Isfjorden fans localized along the Svalbard^ Barents Sea continental margin, reveal an interesting depositional system consisting of stacked debris flow lobes. The frequent release of debris flows was associated with large volumes of sediment rapidly delivered to the shelf break during periods of maximum glaciation. The compositions of the lobes for both fans are similar, consisting of mainly clay and silt. The data show, however, a dramatic difference in runout distances for the two areas. Isfjorden debris lobes are 10^30 km in length whereas Bear Island lobes are 100^200 km in length. Even more intriguing is the fact that the large runout distances on the Bear Island fan occurred on slopes less than 1 ‡ whereas the Isfjorden fan flows occurred on slopes greater than 4‡. Depth-averaged non-linear one-dimensional equations for balance of mass and linear momentum are applied to simulate the subaqueous debris flow. The equations are solved by the numerical model BING, describing the flow as a visco-plastic Bingham fluid. The model is employed to study the effect yield strength, viscosity and bathymetry have on debris flow runout. The study shows that the large runout distances can be achieved on the Bear Island fan by visco-plastic flows with sufficiently low yield strength. High yield strength sediments require an additional mechanism, such as hydroplaning, to reach measured runout distances. Most importantly, this study shows the necessity of good rheological measurements for accurate numerical modeling of subaqueous debris flows. 9 2002 Elsevier Science B.V. All rights reserved. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Je¡rey G. Marr A Anders Elverh$i B Carl Harbitz C Jasim Imran D Peter Har A |
author_facet |
Je¡rey G. Marr A Anders Elverh$i B Carl Harbitz C Jasim Imran D Peter Har A |
author_sort |
Je¡rey G. Marr A |
title |
Numerical simulation of mud-rich subaqueous debris £ows on the glacially active margins of the Svalbard^Barents Sea |
title_short |
Numerical simulation of mud-rich subaqueous debris £ows on the glacially active margins of the Svalbard^Barents Sea |
title_full |
Numerical simulation of mud-rich subaqueous debris £ows on the glacially active margins of the Svalbard^Barents Sea |
title_fullStr |
Numerical simulation of mud-rich subaqueous debris £ows on the glacially active margins of the Svalbard^Barents Sea |
title_full_unstemmed |
Numerical simulation of mud-rich subaqueous debris £ows on the glacially active margins of the Svalbard^Barents Sea |
title_sort |
numerical simulation of mud-rich subaqueous debris £ows on the glacially active margins of the svalbard^barents sea |
publishDate |
2002 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.568.5992 http://folk.uio.no/anelverh/Papers/Marr_et_al_Numerical_simulation_of_mud_rich_subaqueous_debris_flows_ the_Svalbard_Barents_Sea.pdf |
long_lat |
ENVELOPE(-67.250,-67.250,-68.151,-68.151) ENVELOPE(-63.400,-63.400,-69.400,-69.400) |
geographic |
Svalbard Barents Sea Bear Island Bingham |
geographic_facet |
Svalbard Barents Sea Bear Island Bingham |
genre |
Barents Sea Bear Island Isfjord* Isfjorden Svalbard |
genre_facet |
Barents Sea Bear Island Isfjord* Isfjorden Svalbard |
op_source |
http://folk.uio.no/anelverh/Papers/Marr_et_al_Numerical_simulation_of_mud_rich_subaqueous_debris_flows_ the_Svalbard_Barents_Sea.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.568.5992 http://folk.uio.no/anelverh/Papers/Marr_et_al_Numerical_simulation_of_mud_rich_subaqueous_debris_flows_ the_Svalbard_Barents_Sea.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766370130440224768 |