Effect of bedrock morphology, axial transport and lateral material sources on braided river sediments: A case study from Munin Valley, central Spitsbergen
The Munin River (Svalbard) is a mountainous braided proglacial river. It drains from two valley glaciers developing an elongated channel belt and turning into a wide braided outwash fan before entering the main river. The Munin River is in its axial head supplied by the material from glaciers, and a...
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ftdoajarticles:oai:doaj.org/article:ff908c392f2e406d9494f75e06baf2ad 2023-05-15T15:06:39+02:00 Effect of bedrock morphology, axial transport and lateral material sources on braided river sediments: A case study from Munin Valley, central Spitsbergen Ondráčková Lenka Nývlt Daniel Hanáček Martin 2020-09-01T00:00:00Z https://doi.org/10.24425/ppr.2020.133013 https://doaj.org/article/ff908c392f2e406d9494f75e06baf2ad EN eng Polish Academy of Sciences http://journals.pan.pl/dlibra/publication/133013/edition/116222/content https://doaj.org/toc/0138-0338 doi:10.24425/ppr.2020.133013 0138-0338 https://doaj.org/article/ff908c392f2e406d9494f75e06baf2ad Polish Polar Research, Vol 41, Iss 3, Pp 213-235 (2020) arctic svalbard sedimentology proglacial stream bedload sediment Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.24425/ppr.2020.133013 2022-12-30T21:58:44Z The Munin River (Svalbard) is a mountainous braided proglacial river. It drains from two valley glaciers developing an elongated channel belt and turning into a wide braided outwash fan before entering the main river. The Munin River is in its axial head supplied by the material from glaciers, and along the stream by material from lateral sources, i.e. braided outwash fan, debris-flow and fluvial-flow dominated fans. Detailed analyses of clast roundness showed that roundness suddenly changes to higher degrees in negative correlation with channel belt width and sinuosity of the channels. The roundness increases rapidly in sections with small channel belt width and low sinuosity, which can be seen in the bedrock gorge. On the contrary, the roundness does not change much in sections with large channel belt width and high sinuosity. The morphological changes of the channel belt are controlled by the bedrock morphology of the catchment, which is the main factor affecting the clast roundness in the Munin River. The nature of the lateral material sources and the downstream traction affect rather the individual gravel fractions. Article in Journal/Newspaper Arctic Polar Research Svalbard Spitsbergen Directory of Open Access Journals: DOAJ Articles Arctic Svalbard |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
arctic svalbard sedimentology proglacial stream bedload sediment Geology QE1-996.5 |
spellingShingle |
arctic svalbard sedimentology proglacial stream bedload sediment Geology QE1-996.5 Ondráčková Lenka Nývlt Daniel Hanáček Martin Effect of bedrock morphology, axial transport and lateral material sources on braided river sediments: A case study from Munin Valley, central Spitsbergen |
topic_facet |
arctic svalbard sedimentology proglacial stream bedload sediment Geology QE1-996.5 |
description |
The Munin River (Svalbard) is a mountainous braided proglacial river. It drains from two valley glaciers developing an elongated channel belt and turning into a wide braided outwash fan before entering the main river. The Munin River is in its axial head supplied by the material from glaciers, and along the stream by material from lateral sources, i.e. braided outwash fan, debris-flow and fluvial-flow dominated fans. Detailed analyses of clast roundness showed that roundness suddenly changes to higher degrees in negative correlation with channel belt width and sinuosity of the channels. The roundness increases rapidly in sections with small channel belt width and low sinuosity, which can be seen in the bedrock gorge. On the contrary, the roundness does not change much in sections with large channel belt width and high sinuosity. The morphological changes of the channel belt are controlled by the bedrock morphology of the catchment, which is the main factor affecting the clast roundness in the Munin River. The nature of the lateral material sources and the downstream traction affect rather the individual gravel fractions. |
format |
Article in Journal/Newspaper |
author |
Ondráčková Lenka Nývlt Daniel Hanáček Martin |
author_facet |
Ondráčková Lenka Nývlt Daniel Hanáček Martin |
author_sort |
Ondráčková Lenka |
title |
Effect of bedrock morphology, axial transport and lateral material sources on braided river sediments: A case study from Munin Valley, central Spitsbergen |
title_short |
Effect of bedrock morphology, axial transport and lateral material sources on braided river sediments: A case study from Munin Valley, central Spitsbergen |
title_full |
Effect of bedrock morphology, axial transport and lateral material sources on braided river sediments: A case study from Munin Valley, central Spitsbergen |
title_fullStr |
Effect of bedrock morphology, axial transport and lateral material sources on braided river sediments: A case study from Munin Valley, central Spitsbergen |
title_full_unstemmed |
Effect of bedrock morphology, axial transport and lateral material sources on braided river sediments: A case study from Munin Valley, central Spitsbergen |
title_sort |
effect of bedrock morphology, axial transport and lateral material sources on braided river sediments: a case study from munin valley, central spitsbergen |
publisher |
Polish Academy of Sciences |
publishDate |
2020 |
url |
https://doi.org/10.24425/ppr.2020.133013 https://doaj.org/article/ff908c392f2e406d9494f75e06baf2ad |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Polar Research Svalbard Spitsbergen |
genre_facet |
Arctic Polar Research Svalbard Spitsbergen |
op_source |
Polish Polar Research, Vol 41, Iss 3, Pp 213-235 (2020) |
op_relation |
http://journals.pan.pl/dlibra/publication/133013/edition/116222/content https://doaj.org/toc/0138-0338 doi:10.24425/ppr.2020.133013 0138-0338 https://doaj.org/article/ff908c392f2e406d9494f75e06baf2ad |
op_doi |
https://doi.org/10.24425/ppr.2020.133013 |
_version_ |
1766338212755668992 |