Braidplain changes during the summer research season 2016 -
Muninelva River, Central Svalbard

k 2017

Braidplain changes during the summer research season 2016 - Muninelva River, Central Svalbard

ONDRÁČKOVÁ, Lenka, Martin HANÁČEK, Daniel NÝVLT a Kamil LÁSKA

Základní údaje

Originální název

Braidplain changes during the summer research season 2016 - Muninelva River, Central Svalbard

Autoři

ONDRÁČKOVÁ, Lenka (203 Česká republika, garant, domácí), Martin HANÁČEK (203 Česká republika), Daniel NÝVLT (203 Česká republika) a Kamil LÁSKA (203 Česká republika)

Vydání

17th Annual ČAG Conference - State of geomorphological research in 2017, 2017

Další údaje

Jazyk

angličtina

Typ výsledku

Prezentace na konferencích

Obor

10508 Physical geography

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Kód RIV

RIV/00216224:14310/17:00096735

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

gravel-bed braided river; sediment sources; Muninelva; Svalbard

Příznaky

Mezinárodní význam

Změněno: 13. 3. 2018 13:21, doc. Mgr. Daniel Nývlt, Ph.D.

Anotace

V originále

Proglacial braided river systems in the High Arctic are very changeable during summer seasons. Hydrological regime of local streams is connected to a functioning the interaction between glaciers and atmosphere. This study summarize fluvial geomorphological summer research season of 2016 (7.7.2016 –27.8.2016). Our area of interest is located in central part of Svalbard archipelago near the Pyramiden settlement in Muninelva River catchment. The river is 6 km long and its channel belt is 50–250 m wide (Ondráčková et al., 2016). During the observation period of Muninelva River fluvial system we recognized many examples of well-developed fluvial forms changes, channel pattern evolution, channel bars downstream change, flood stages, hydrological conditions change, channel course replacement and also the end of the hydrological cycle. The changes of braided river channels are coupled with meteorological conditions, especially with temperature and precipitations. For example, the main channel of Muninelva River completely changed its trajectory at the end of the season. We also monitored activity of sediment supply in the whole river catchment. Muninelva River has two main material sources according to their position in respect to the main stream: I) head source – Muninbreen Glacier and its terminal moraine-mound complexes; II) lateral sources – colluvial and alluvial fans, terminoglacial fan from a lateral glacier and Devonian sedimentary rock bedrock in the channel belt banks. Through photographs we document the observed changes and bring new and original findings about the functioning of this proglacial river and its catchment. The overview of observed geomorphological changes give us new starting points for subsequent research topics (e.g.; downstream bedload grain-size and shape changes). (Financing, thanks: NF-CZ07-INS-6-263-2015 and LM2015078, Jon Ove Hagen, Jirka Ondráček and the field assistants)

Návaznosti

LM2015078, projekt VaV

Název: Česká polární výzkumná infrastruktura (Akronym: CzechPolar2)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Czech Polar Research Infrastructure

Citovat

ONDRÁČKOVÁ, Lenka, Martin HANÁČEK, Daniel NÝVLT a Kamil LÁSKA. Braidplain changes during the summer research season 2016 - Muninelva River, Central Svalbard. In 17th Annual ČAG Conference - State of geomorphological research in 2017. 2017.

@proceedings{1380922,
   author = {Ondráčková, Lenka and Hanáček, Martin and Nývlt, Daniel and Láska, Kamil},
   booktitle = {17th Annual ČAG Conference - State of geomorphological research in 2017},
   keywords = {gravel-bed braided river; sediment sources; Muninelva; Svalbard},
   language = {eng},
   title = {Braidplain changes during the summer research season 2016 - Muninelva River, Central Svalbard},
   year = {2017}
}

TY  - CONF
ID  - 1380922
AU  - Ondráčková, Lenka - Hanáček, Martin - Nývlt, Daniel - Láska, Kamil
PY  - 2017
TI  - Braidplain changes during the summer research season 2016 - Muninelva River, Central Svalbard
KW  - gravel-bed braided river
KW  - sediment sources
KW  - Muninelva
KW  - Svalbard
N2  - Proglacial braided river systems in the High Arctic are very changeable during summer seasons. Hydrological regime of local streams is connected to a functioning the interaction between glaciers and atmosphere. This study summarize fluvial geomorphological summer research season of 2016 (7.7.2016 –27.8.2016). Our area of interest is located in central part of Svalbard archipelago near the Pyramiden settlement in Muninelva River catchment. The river is 6 km long and its channel belt is 50–250 m wide (Ondráčková et al., 2016). During the observation period of Muninelva River fluvial system we recognized many examples of well-developed fluvial forms changes, channel pattern evolution, channel bars downstream change, flood stages, hydrological conditions change, channel course replacement and also the end of the hydrological cycle. The changes of braided river channels are coupled with meteorological conditions, especially with temperature and precipitations. For example, the main channel of Muninelva River completely changed its trajectory at the end of the season. We also monitored activity of sediment supply in the whole river catchment. Muninelva River has two main material sources according to their position in respect to the main stream: I) head source – Muninbreen Glacier and its terminal moraine-mound complexes; II) lateral sources – colluvial and alluvial fans, terminoglacial fan from a lateral glacier and Devonian sedimentary rock bedrock in the channel belt banks. Through photographs we document the observed changes and bring new and original findings about the functioning of this proglacial river and its catchment. The overview of observed geomorphological changes give us new starting points for subsequent research topics (e.g.; downstream bedload grain-size and shape changes). (Financing, thanks: NF-CZ07-INS-6-263-2015 and LM2015078, Jon Ove Hagen, Jirka Ondráček and the field assistants)
ER  -

ONDRÁČKOVÁ, Lenka, Martin HANÁČEK, Daniel NÝVLT a Kamil LÁSKA. Braidplain changes during the summer research season 2016 - Muninelva River, Central Svalbard. In \textit{17th Annual ČAG Conference - State of geomorphological research in 2017}. 2017.

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