The Role of Bedload Transport in the Development of a Proglacial River Alluvial Fan (Case Study: Scott River, Southwest Svalbard)
This study, which was conducted between 2010 and 2013, presents the results of direct, continuous measurements of the bedload transport rate at the mouth section of the Scott River catchment (NW part of Wedel-Jarlsberg Land, Svalbard). In four consecutive melt seasons, the bedload flux was analyzed...
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ftmdpi:oai:mdpi.com:/2306-5338/8/4/173/ 2023-08-20T04:10:04+02:00 The Role of Bedload Transport in the Development of a Proglacial River Alluvial Fan (Case Study: Scott River, Southwest Svalbard) Waldemar Kociuba agris 2021-11-22 application/pdf https://doi.org/10.3390/hydrology8040173 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/hydrology8040173 https://creativecommons.org/licenses/by/4.0/ Hydrology; Volume 8; Issue 4; Pages: 173 bedload sampling bedload flux river bedload trap proglacial gravel-bed river sediment budgeting Svalbard Text 2021 ftmdpi https://doi.org/10.3390/hydrology8040173 2023-08-01T03:19:57Z This study, which was conducted between 2010 and 2013, presents the results of direct, continuous measurements of the bedload transport rate at the mouth section of the Scott River catchment (NW part of Wedel-Jarlsberg Land, Svalbard). In four consecutive melt seasons, the bedload flux was analyzed at two cross-sections located in the lower reaches of the gravel-bed proglacial river. The transported bedload was measured using two sets of River Bedload Traps (RBTs). Over the course of 130 simultaneous measurement days, a total of 930 bedload samples were collected. During this period, the river discharged about 1.32 t of bedload through cross-section I (XS I), located at the foot of the alluvial fan, and 0.99 t through cross-section II (XS II), located at the river mouth running into the fjord. A comparison of the bedload flux showed a distinctive disproportion between cross-sections. Specifically, the average daily bedload flux QB was 130 kg day−1 (XS I) and 81 kg day−1 (XS II) at the individual cross-profiles. The lower bedload fluxes that were recorded at specified periods in XS II, which closed the catchment at the river mouth from the alluvial cone, indicated an active role of aggradation processes. Approximately 40% of all transported bedload was stored at the alluvial fan, mostly in the active channel zone. However, comparative Geomorphic Change Detection (GCD) analyses of the alluvial fan, which were performed over the period between August 2010 and August 2013, indicated a general lowering of the surface (erosion). It can be assumed that the melt season’s average flows in the active channel zone led to a greater deposition of bedload particles than what was discharged with high intensity during floods (especially the bankfull stage, effectively reshaping the whole surface of the alluvial fan). This study documents that the intensity of bedload flux was determined by the frequency of floods. Notably, the highest daily rates recorded in successive seasons accounted for 12–30% of the total bedload flux. ... Text Svalbard Wedel Jarlsberg Land MDPI Open Access Publishing Scott River ENVELOPE(-103.284,-103.284,56.267,56.267) Svalbard Wedel Jarlsberg Land ENVELOPE(15.362,15.362,77.201,77.201) Wedel-Jarlsberg ENVELOPE(-165.133,-165.133,-85.650,-85.650) Hydrology 8 4 173 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
bedload sampling bedload flux river bedload trap proglacial gravel-bed river sediment budgeting Svalbard |
spellingShingle |
bedload sampling bedload flux river bedload trap proglacial gravel-bed river sediment budgeting Svalbard Waldemar Kociuba The Role of Bedload Transport in the Development of a Proglacial River Alluvial Fan (Case Study: Scott River, Southwest Svalbard) |
topic_facet |
bedload sampling bedload flux river bedload trap proglacial gravel-bed river sediment budgeting Svalbard |
description |
This study, which was conducted between 2010 and 2013, presents the results of direct, continuous measurements of the bedload transport rate at the mouth section of the Scott River catchment (NW part of Wedel-Jarlsberg Land, Svalbard). In four consecutive melt seasons, the bedload flux was analyzed at two cross-sections located in the lower reaches of the gravel-bed proglacial river. The transported bedload was measured using two sets of River Bedload Traps (RBTs). Over the course of 130 simultaneous measurement days, a total of 930 bedload samples were collected. During this period, the river discharged about 1.32 t of bedload through cross-section I (XS I), located at the foot of the alluvial fan, and 0.99 t through cross-section II (XS II), located at the river mouth running into the fjord. A comparison of the bedload flux showed a distinctive disproportion between cross-sections. Specifically, the average daily bedload flux QB was 130 kg day−1 (XS I) and 81 kg day−1 (XS II) at the individual cross-profiles. The lower bedload fluxes that were recorded at specified periods in XS II, which closed the catchment at the river mouth from the alluvial cone, indicated an active role of aggradation processes. Approximately 40% of all transported bedload was stored at the alluvial fan, mostly in the active channel zone. However, comparative Geomorphic Change Detection (GCD) analyses of the alluvial fan, which were performed over the period between August 2010 and August 2013, indicated a general lowering of the surface (erosion). It can be assumed that the melt season’s average flows in the active channel zone led to a greater deposition of bedload particles than what was discharged with high intensity during floods (especially the bankfull stage, effectively reshaping the whole surface of the alluvial fan). This study documents that the intensity of bedload flux was determined by the frequency of floods. Notably, the highest daily rates recorded in successive seasons accounted for 12–30% of the total bedload flux. ... |
format |
Text |
author |
Waldemar Kociuba |
author_facet |
Waldemar Kociuba |
author_sort |
Waldemar Kociuba |
title |
The Role of Bedload Transport in the Development of a Proglacial River Alluvial Fan (Case Study: Scott River, Southwest Svalbard) |
title_short |
The Role of Bedload Transport in the Development of a Proglacial River Alluvial Fan (Case Study: Scott River, Southwest Svalbard) |
title_full |
The Role of Bedload Transport in the Development of a Proglacial River Alluvial Fan (Case Study: Scott River, Southwest Svalbard) |
title_fullStr |
The Role of Bedload Transport in the Development of a Proglacial River Alluvial Fan (Case Study: Scott River, Southwest Svalbard) |
title_full_unstemmed |
The Role of Bedload Transport in the Development of a Proglacial River Alluvial Fan (Case Study: Scott River, Southwest Svalbard) |
title_sort |
role of bedload transport in the development of a proglacial river alluvial fan (case study: scott river, southwest svalbard) |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/hydrology8040173 |
op_coverage |
agris |
long_lat |
ENVELOPE(-103.284,-103.284,56.267,56.267) ENVELOPE(15.362,15.362,77.201,77.201) ENVELOPE(-165.133,-165.133,-85.650,-85.650) |
geographic |
Scott River Svalbard Wedel Jarlsberg Land Wedel-Jarlsberg |
geographic_facet |
Scott River Svalbard Wedel Jarlsberg Land Wedel-Jarlsberg |
genre |
Svalbard Wedel Jarlsberg Land |
genre_facet |
Svalbard Wedel Jarlsberg Land |
op_source |
Hydrology; Volume 8; Issue 4; Pages: 173 |
op_relation |
https://dx.doi.org/10.3390/hydrology8040173 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/hydrology8040173 |
container_title |
Hydrology |
container_volume |
8 |
container_issue |
4 |
container_start_page |
173 |
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1774723993205473280 |