DOWNSTREAM VARIABILITY OF CHANNEL MORPHOLOGY AND BED MATERIAL IN THE BRAIDED KELLER RIVER, JAMES ROSS ISLAND, ANTARCTICA
Changes in sediment supply and water availability in rivers are associated with ongoing climate change and glacier melting. The processes connected with increasing temperatures largely determine braidplain activity within glacier forefields. This work focuses on downstream changes in channel morphol...
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COMITATO GLACIOLOGICO ITALIANO
2020
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ftunivpadovairis:oai:www.research.unipd.it:11577/3474983 2024-04-14T08:02:16+00:00 DOWNSTREAM VARIABILITY OF CHANNEL MORPHOLOGY AND BED MATERIAL IN THE BRAIDED KELLER RIVER, JAMES ROSS ISLAND, ANTARCTICA Ondrackova, L Surian, N Nyvlt, D Stuchlik, R Ondrackova, L Surian, N Nyvlt, D Stuchlik, R 2020 STAMPA https://hdl.handle.net/11577/3474983 https://doi.org/10.4461/GFDQ.2020.43.8 eng eng COMITATO GLACIOLOGICO ITALIANO info:eu-repo/semantics/altIdentifier/wos/WOS:000645287600001 volume:43 issue:2 firstpage:195 lastpage:207 numberofpages:13 journal:GEOGRAFIA FISICA E DINAMICA QUATERNARIA https://hdl.handle.net/11577/3474983 doi:10.4461/GFDQ.2020.43.8 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85125707167 Proglacial stream Channel width Clast roundne Sediment source Sediment connectivity Antarctica info:eu-repo/semantics/article 2020 ftunivpadovairis https://doi.org/10.4461/GFDQ.2020.43.8 2024-03-21T18:49:07Z Changes in sediment supply and water availability in rivers are associated with ongoing climate change and glacier melting. The processes connected with increasing temperatures largely determine braidplain activity within glacier forefields. This work focuses on downstream changes in channel morphology (i.e., channel width and braiding intensity) and bed material (i.e., petrological types and clast roundness), as well as possible controlling factors (i.e., sediment sources and sediment connectivity). The study area is the Keller River catchment located on the James Ross Island (JRI), Antarctica. This paper describes the 8.6 km-long Keller River in terms of morphology, including river braidplains, sediment sources and connectivity within the catchment. Eight sediment sources and three types were identified: one moraine sediment source, four debris-flow-dominated sediment sources and three fluvial-flow-dominated sediment sources. Along with high sediment connectivity, the occurrence of lateral sediment sources from tributaries significantly impacted downstream changes in channel morphology and processes. Channel width and braiding intensity showed an increasing downstream trend, although the channel width trend was irregular. As for bed material, sediment sources markedly control clast roundness with little effect of petrological properties. Article in Journal/Newspaper Antarc* Antarctica James Ross Island Ross Island Padua Research Archive (IRIS - Università degli Studi di Padova) Keller ENVELOPE(-58.406,-58.406,-62.073,-62.073) Ross Island |
institution |
Open Polar |
collection |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
op_collection_id |
ftunivpadovairis |
language |
English |
topic |
Proglacial stream Channel width Clast roundne Sediment source Sediment connectivity Antarctica |
spellingShingle |
Proglacial stream Channel width Clast roundne Sediment source Sediment connectivity Antarctica Ondrackova, L Surian, N Nyvlt, D Stuchlik, R DOWNSTREAM VARIABILITY OF CHANNEL MORPHOLOGY AND BED MATERIAL IN THE BRAIDED KELLER RIVER, JAMES ROSS ISLAND, ANTARCTICA |
topic_facet |
Proglacial stream Channel width Clast roundne Sediment source Sediment connectivity Antarctica |
description |
Changes in sediment supply and water availability in rivers are associated with ongoing climate change and glacier melting. The processes connected with increasing temperatures largely determine braidplain activity within glacier forefields. This work focuses on downstream changes in channel morphology (i.e., channel width and braiding intensity) and bed material (i.e., petrological types and clast roundness), as well as possible controlling factors (i.e., sediment sources and sediment connectivity). The study area is the Keller River catchment located on the James Ross Island (JRI), Antarctica. This paper describes the 8.6 km-long Keller River in terms of morphology, including river braidplains, sediment sources and connectivity within the catchment. Eight sediment sources and three types were identified: one moraine sediment source, four debris-flow-dominated sediment sources and three fluvial-flow-dominated sediment sources. Along with high sediment connectivity, the occurrence of lateral sediment sources from tributaries significantly impacted downstream changes in channel morphology and processes. Channel width and braiding intensity showed an increasing downstream trend, although the channel width trend was irregular. As for bed material, sediment sources markedly control clast roundness with little effect of petrological properties. |
author2 |
Ondrackova, L Surian, N Nyvlt, D Stuchlik, R |
format |
Article in Journal/Newspaper |
author |
Ondrackova, L Surian, N Nyvlt, D Stuchlik, R |
author_facet |
Ondrackova, L Surian, N Nyvlt, D Stuchlik, R |
author_sort |
Ondrackova, L |
title |
DOWNSTREAM VARIABILITY OF CHANNEL MORPHOLOGY AND BED MATERIAL IN THE BRAIDED KELLER RIVER, JAMES ROSS ISLAND, ANTARCTICA |
title_short |
DOWNSTREAM VARIABILITY OF CHANNEL MORPHOLOGY AND BED MATERIAL IN THE BRAIDED KELLER RIVER, JAMES ROSS ISLAND, ANTARCTICA |
title_full |
DOWNSTREAM VARIABILITY OF CHANNEL MORPHOLOGY AND BED MATERIAL IN THE BRAIDED KELLER RIVER, JAMES ROSS ISLAND, ANTARCTICA |
title_fullStr |
DOWNSTREAM VARIABILITY OF CHANNEL MORPHOLOGY AND BED MATERIAL IN THE BRAIDED KELLER RIVER, JAMES ROSS ISLAND, ANTARCTICA |
title_full_unstemmed |
DOWNSTREAM VARIABILITY OF CHANNEL MORPHOLOGY AND BED MATERIAL IN THE BRAIDED KELLER RIVER, JAMES ROSS ISLAND, ANTARCTICA |
title_sort |
downstream variability of channel morphology and bed material in the braided keller river, james ross island, antarctica |
publisher |
COMITATO GLACIOLOGICO ITALIANO |
publishDate |
2020 |
url |
https://hdl.handle.net/11577/3474983 https://doi.org/10.4461/GFDQ.2020.43.8 |
long_lat |
ENVELOPE(-58.406,-58.406,-62.073,-62.073) |
geographic |
Keller Ross Island |
geographic_facet |
Keller Ross Island |
genre |
Antarc* Antarctica James Ross Island Ross Island |
genre_facet |
Antarc* Antarctica James Ross Island Ross Island |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000645287600001 volume:43 issue:2 firstpage:195 lastpage:207 numberofpages:13 journal:GEOGRAFIA FISICA E DINAMICA QUATERNARIA https://hdl.handle.net/11577/3474983 doi:10.4461/GFDQ.2020.43.8 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85125707167 |
op_doi |
https://doi.org/10.4461/GFDQ.2020.43.8 |
_version_ |
1796313786896875520 |