Short‐term discharge and suspended sediment fluctuations in the proglacial Skeldal River, north‐east Greenland
Abstract The summer discharge pattern of the Skeldal River, which drains a 560 km 2 partly glacierized catchment in north‐east Greenland, is dominated by diurnal oscillations reflecting variations in the melt rate of snow and ice in the basin. Superimposed on this diurnal pattern are numerous short‐...
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crwiley:10.1002/hyp.156 2024-06-02T08:05:55+00:00 Short‐term discharge and suspended sediment fluctuations in the proglacial Skeldal River, north‐east Greenland Stott, T. A. Grove, J. R. 2001 http://dx.doi.org/10.1002/hyp.156 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.156 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.156 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 15, issue 3, page 407-423 ISSN 0885-6087 1099-1085 journal-article 2001 crwiley https://doi.org/10.1002/hyp.156 2024-05-03T10:40:07Z Abstract The summer discharge pattern of the Skeldal River, which drains a 560 km 2 partly glacierized catchment in north‐east Greenland, is dominated by diurnal oscillations reflecting variations in the melt rate of snow and ice in the basin. Superimposed on this diurnal pattern are numerous short‐lived discharge fluctuations of irregular periodicity and magnitude. The larger fluctuations are described and attributed to both rainfall events and periodic collapse of the glacier margin damming flow from beneath the Skelbrae glacier. Other minor fluctuations are less readily explained but are associated with changes in the channelized and distributed reservoirs and possibly temporary blockage of subglacial conduits caused by ice melt with subsequent damming. Fluctuations in suspended sediment concentration (SSC) are normally associated with discharge fluctuations, although examples of ‘transient flushes’ were observed where marked increases in SSC occurred in the absence of corresponding discharge variations. A strong relationship between the event discharge increase and event SSC increase for rainfall‐induced events was established, but no such relationship existed for non‐rainfall‐induced events. There is some evidence for an exhaustion effect in the SSC patterns both at the event time‐scale and as the month proceeds. A mean suspended sediment load of 1765 ± 0·26 t day −1 was estimated for the study period, which would be equivalent to a suspended sediment yield of 732 ± 4 t km −2 year −1 . Copyright © 2001 John Wiley & Sons, Ltd. Article in Journal/Newspaper East Greenland glacier Greenland Wiley Online Library Greenland Skeldal ENVELOPE(-24.317,-24.317,72.200,72.200) Hydrological Processes 15 3 407 423 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The summer discharge pattern of the Skeldal River, which drains a 560 km 2 partly glacierized catchment in north‐east Greenland, is dominated by diurnal oscillations reflecting variations in the melt rate of snow and ice in the basin. Superimposed on this diurnal pattern are numerous short‐lived discharge fluctuations of irregular periodicity and magnitude. The larger fluctuations are described and attributed to both rainfall events and periodic collapse of the glacier margin damming flow from beneath the Skelbrae glacier. Other minor fluctuations are less readily explained but are associated with changes in the channelized and distributed reservoirs and possibly temporary blockage of subglacial conduits caused by ice melt with subsequent damming. Fluctuations in suspended sediment concentration (SSC) are normally associated with discharge fluctuations, although examples of ‘transient flushes’ were observed where marked increases in SSC occurred in the absence of corresponding discharge variations. A strong relationship between the event discharge increase and event SSC increase for rainfall‐induced events was established, but no such relationship existed for non‐rainfall‐induced events. There is some evidence for an exhaustion effect in the SSC patterns both at the event time‐scale and as the month proceeds. A mean suspended sediment load of 1765 ± 0·26 t day −1 was estimated for the study period, which would be equivalent to a suspended sediment yield of 732 ± 4 t km −2 year −1 . Copyright © 2001 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Stott, T. A. Grove, J. R. |
spellingShingle |
Stott, T. A. Grove, J. R. Short‐term discharge and suspended sediment fluctuations in the proglacial Skeldal River, north‐east Greenland |
author_facet |
Stott, T. A. Grove, J. R. |
author_sort |
Stott, T. A. |
title |
Short‐term discharge and suspended sediment fluctuations in the proglacial Skeldal River, north‐east Greenland |
title_short |
Short‐term discharge and suspended sediment fluctuations in the proglacial Skeldal River, north‐east Greenland |
title_full |
Short‐term discharge and suspended sediment fluctuations in the proglacial Skeldal River, north‐east Greenland |
title_fullStr |
Short‐term discharge and suspended sediment fluctuations in the proglacial Skeldal River, north‐east Greenland |
title_full_unstemmed |
Short‐term discharge and suspended sediment fluctuations in the proglacial Skeldal River, north‐east Greenland |
title_sort |
short‐term discharge and suspended sediment fluctuations in the proglacial skeldal river, north‐east greenland |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1002/hyp.156 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.156 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.156 |
long_lat |
ENVELOPE(-24.317,-24.317,72.200,72.200) |
geographic |
Greenland Skeldal |
geographic_facet |
Greenland Skeldal |
genre |
East Greenland glacier Greenland |
genre_facet |
East Greenland glacier Greenland |
op_source |
Hydrological Processes volume 15, issue 3, page 407-423 ISSN 0885-6087 1099-1085 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/hyp.156 |
container_title |
Hydrological Processes |
container_volume |
15 |
container_issue |
3 |
container_start_page |
407 |
op_container_end_page |
423 |
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1800750806832513024 |