Axial Transport and Sources of Fluvial Gravel in Munindalen, Svalbard
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F18%3A00105283" target="_blank" >RIV/00216224:14310/18:00105283 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Axial Transport and Sources of Fluvial Gravel in Munindalen, Svalbard
Original language description
In order to study the effect of axial transport and lateral inputs on sediment characteristics in High Arctic proglacial streams we focused on the sediments of Munindalen in central Svalbard. Muninelva River is ~6 km long; its channel belt is 50-250 m wide and has a valley-train character, which changes into a braided outwash fan at the mouth. The river is dominantly pebble-cobble gravely along the entire stream with predominant sandstone and limestone clasts from two main sources according to their position in respect to the main stream: I) axial head source - Muninbreen Glacier and its terminal moraine-mound complexes; II) lateral sources - colluvial and alluvial fans, terminoglacial outwash fan from a lateral glacier and bedrock in the channel belt banks. Our results show that the axial head source is crucial for the origin of cobble fraction, whereas lateral sources contribute by large amount of pebble material and overwhelms thus the downstream trend in pebble clasts' roundness. On the contrary, the amount of cobbles transported from the lateral sources is smaller; therefore the downstream trend of cobble clasts roundness is not masked by lateral inputs. Pebbles are highly mobile both in river transport and on lateral fans; therefore lateral inputs hides the downstream roundness trend in Muninelva River sediments, which was not found for cobbles. This study emphasized the importance of material sources on sedimentary characteristics in proglacial streams.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů