Subglacial drainage system changes of the Gulkana Glacier, Alaska: discharge and sediment load observations and modelling
Hydrological characteristics of englacial and subglacial drainage systems in Gulkana Glacier, Alaska, were examined by analysing temporal variations of discharge and sediment load in the proglacial Phelan Creek in 2001. From data plots on semi-log paper, it appeared appropriate to separate both disc...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/20006 2023-05-15T16:20:25+02:00 Subglacial drainage system changes of the Gulkana Glacier, Alaska: discharge and sediment load observations and modelling Kido, Daisaku Chikita, Kazuhisa A. Hirayama, Kenta http://hdl.handle.net/2115/20006 https://doi.org/10.1002/hyp.6364 eng eng John Wiley & Sons http://www.interscience.wiley.com/ http://hdl.handle.net/2115/20006 Hydrological Processes, 21(3): 399-410 http://dx.doi.org/10.1002/hyp.6364 Copyright © 2007 John Wiley & Sons, Inc., Hydrological Processes, Volume 21, Issue 3, Pages 399-410 glacier-melt discharge suspended sediment Gulkana Glacier subglacial drainage system tank model 452.12 article (author version) fthokunivhus https://doi.org/10.1002/hyp.6364 2022-11-18T01:01:23Z Hydrological characteristics of englacial and subglacial drainage systems in Gulkana Glacier, Alaska, were examined by analysing temporal variations of discharge and sediment load in the proglacial Phelan Creek in 2001. From data plots on semi-log paper, it appeared appropriate to separate both discharge and sediment load into fast and slow components. The two components were possibly produced by two different drainage systems: an englacial and subglacial, “channellized” system in the ablation zone, and a subglacial, “distributed” system in the accumulation zone. The data indicate the occurrence of an event during which part of the “distributed” drainage system changed into the “channellized” drainage system. The daily time-series of discharge and sediment load were represented using a tank model. In the model, the drainage from an additional tank was added, supposing that a subglacial reservoir full of water and sediment collapsed slowly when the subglacial drainage system changed from distributed to channellized. The simulation with the collapsed tank gave much more reasonable results than those with no collapsed tank. The contribution of the collapsed tank to total sediment load is 24%, which is much larger than 9% to total discharge. Copyright © 2006 John Wiley & Sons, Ltd. Article in Journal/Newspaper glacier Alaska Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Phelan ENVELOPE(-130.263,-130.263,54.200,54.200) Hydrological Processes 21 3 399 410 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
glacier-melt discharge suspended sediment Gulkana Glacier subglacial drainage system tank model 452.12 |
spellingShingle |
glacier-melt discharge suspended sediment Gulkana Glacier subglacial drainage system tank model 452.12 Kido, Daisaku Chikita, Kazuhisa A. Hirayama, Kenta Subglacial drainage system changes of the Gulkana Glacier, Alaska: discharge and sediment load observations and modelling |
topic_facet |
glacier-melt discharge suspended sediment Gulkana Glacier subglacial drainage system tank model 452.12 |
description |
Hydrological characteristics of englacial and subglacial drainage systems in Gulkana Glacier, Alaska, were examined by analysing temporal variations of discharge and sediment load in the proglacial Phelan Creek in 2001. From data plots on semi-log paper, it appeared appropriate to separate both discharge and sediment load into fast and slow components. The two components were possibly produced by two different drainage systems: an englacial and subglacial, “channellized” system in the ablation zone, and a subglacial, “distributed” system in the accumulation zone. The data indicate the occurrence of an event during which part of the “distributed” drainage system changed into the “channellized” drainage system. The daily time-series of discharge and sediment load were represented using a tank model. In the model, the drainage from an additional tank was added, supposing that a subglacial reservoir full of water and sediment collapsed slowly when the subglacial drainage system changed from distributed to channellized. The simulation with the collapsed tank gave much more reasonable results than those with no collapsed tank. The contribution of the collapsed tank to total sediment load is 24%, which is much larger than 9% to total discharge. Copyright © 2006 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Kido, Daisaku Chikita, Kazuhisa A. Hirayama, Kenta |
author_facet |
Kido, Daisaku Chikita, Kazuhisa A. Hirayama, Kenta |
author_sort |
Kido, Daisaku |
title |
Subglacial drainage system changes of the Gulkana Glacier, Alaska: discharge and sediment load observations and modelling |
title_short |
Subglacial drainage system changes of the Gulkana Glacier, Alaska: discharge and sediment load observations and modelling |
title_full |
Subglacial drainage system changes of the Gulkana Glacier, Alaska: discharge and sediment load observations and modelling |
title_fullStr |
Subglacial drainage system changes of the Gulkana Glacier, Alaska: discharge and sediment load observations and modelling |
title_full_unstemmed |
Subglacial drainage system changes of the Gulkana Glacier, Alaska: discharge and sediment load observations and modelling |
title_sort |
subglacial drainage system changes of the gulkana glacier, alaska: discharge and sediment load observations and modelling |
publisher |
John Wiley & Sons |
url |
http://hdl.handle.net/2115/20006 https://doi.org/10.1002/hyp.6364 |
long_lat |
ENVELOPE(-130.263,-130.263,54.200,54.200) |
geographic |
Phelan |
geographic_facet |
Phelan |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_relation |
http://www.interscience.wiley.com/ http://hdl.handle.net/2115/20006 Hydrological Processes, 21(3): 399-410 http://dx.doi.org/10.1002/hyp.6364 |
op_rights |
Copyright © 2007 John Wiley & Sons, Inc., Hydrological Processes, Volume 21, Issue 3, Pages 399-410 |
op_doi |
https://doi.org/10.1002/hyp.6364 |
container_title |
Hydrological Processes |
container_volume |
21 |
container_issue |
3 |
container_start_page |
399 |
op_container_end_page |
410 |
_version_ |
1766008334318567424 |