Jökulhlaups: their associated landforms and landscape impacts
Glacial outburst floods also known as jökulhlaups are important features connected with glaciers globally. They may induce catastrophic floods as well as new landforms. This review describes and synthesizes jökulhlaup trigger mechanisms as well as associated landforms and landscape impacts of jökulh...
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Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap
2011
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ftulundlupsp:oai:lup-student-papers.lub.lu.se:2154389 2023-07-30T04:03:39+02:00 Jökulhlaups: their associated landforms and landscape impacts Bernhardson, Martin 2011 application/pdf http://lup.lub.lu.se/student-papers/record/2154389 eng eng Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap http://lup.lub.lu.se/student-papers/record/2154389 physical geography geomorphology Jökulhlaup Sandur Skeiðarársandur naturgeografi geomorfologi Earth and Environmental Sciences M2 2011 ftulundlupsp 2023-07-11T20:07:41Z Glacial outburst floods also known as jökulhlaups are important features connected with glaciers globally. They may induce catastrophic floods as well as new landforms. This review describes and synthesizes jökulhlaup trigger mechanisms as well as associated landforms and landscape impacts of jökulhlaups with a special focus on Skeiðarársandur, south Iceland, and the 1996 jökulhlaup. Important sources of water for jökulhlaups are rapid melting of glacier ice, heavy rainfall, and most importantly the release of stored water from glacial lakes. The release of water may be due to three main initiating processes; overspilling, failure of the dam or changes in the hydraulic pressure. Some scholars divide them into further categories depending on their drainage mechanism. It is quite hard to draw a strict line between what should be classified as only jökulhlaup induced landforms and what should not. There is one landform that is mentioned together with jökulhlaups more than any other and this is the sandur or the glacial outwash plain. An abnormally large fissure eruption in conjunction with storage of melt water that exceeded the usual threshold for drainage from the lake Grímsvötn made the 1996 jökulhlaup at Skeiðarársandur to an unusually large event. Denna kandidatuppsats är en litteraturstudie som behandlar jökulhlaups och deras tillhörande landformer samt deras inverkan på landskapet. Jökulhlaup är den isländska termen för störtfloder från glaciärer och används internationellt för att beskriva detta fenomen. Vattnet som skapar dessa störtfloder kan ha många olika ursprung, såsom kraftig nederbörd, snabb avsmältning av glaciäris, tömning av en glacial sjö etc. Glaciala sjöar anses ha tre huvudsakliga dräneringmekanismer; att dammen som håller kvar vattnet i sjön brister, att sjön svämmar över eller att vattnet dräneras på grund av tryckskillnader mellan sjön och dess omgivning. Det är svårt att dra en strikt linje mellan vad som ska klassas som landformer som är skapade endast av jökulhlaups eller som också ... Other/Unknown Material glacier Iceland Lund University Publications Student Papers (LUP-SP) Skeiðarársandur ENVELOPE(-17.370,-17.370,63.848,63.848) Dammen ENVELOPE(13.870,13.870,66.151,66.151) |
institution |
Open Polar |
collection |
Lund University Publications Student Papers (LUP-SP) |
op_collection_id |
ftulundlupsp |
language |
English |
topic |
physical geography geomorphology Jökulhlaup Sandur Skeiðarársandur naturgeografi geomorfologi Earth and Environmental Sciences |
spellingShingle |
physical geography geomorphology Jökulhlaup Sandur Skeiðarársandur naturgeografi geomorfologi Earth and Environmental Sciences Bernhardson, Martin Jökulhlaups: their associated landforms and landscape impacts |
topic_facet |
physical geography geomorphology Jökulhlaup Sandur Skeiðarársandur naturgeografi geomorfologi Earth and Environmental Sciences |
description |
Glacial outburst floods also known as jökulhlaups are important features connected with glaciers globally. They may induce catastrophic floods as well as new landforms. This review describes and synthesizes jökulhlaup trigger mechanisms as well as associated landforms and landscape impacts of jökulhlaups with a special focus on Skeiðarársandur, south Iceland, and the 1996 jökulhlaup. Important sources of water for jökulhlaups are rapid melting of glacier ice, heavy rainfall, and most importantly the release of stored water from glacial lakes. The release of water may be due to three main initiating processes; overspilling, failure of the dam or changes in the hydraulic pressure. Some scholars divide them into further categories depending on their drainage mechanism. It is quite hard to draw a strict line between what should be classified as only jökulhlaup induced landforms and what should not. There is one landform that is mentioned together with jökulhlaups more than any other and this is the sandur or the glacial outwash plain. An abnormally large fissure eruption in conjunction with storage of melt water that exceeded the usual threshold for drainage from the lake Grímsvötn made the 1996 jökulhlaup at Skeiðarársandur to an unusually large event. Denna kandidatuppsats är en litteraturstudie som behandlar jökulhlaups och deras tillhörande landformer samt deras inverkan på landskapet. Jökulhlaup är den isländska termen för störtfloder från glaciärer och används internationellt för att beskriva detta fenomen. Vattnet som skapar dessa störtfloder kan ha många olika ursprung, såsom kraftig nederbörd, snabb avsmältning av glaciäris, tömning av en glacial sjö etc. Glaciala sjöar anses ha tre huvudsakliga dräneringmekanismer; att dammen som håller kvar vattnet i sjön brister, att sjön svämmar över eller att vattnet dräneras på grund av tryckskillnader mellan sjön och dess omgivning. Det är svårt att dra en strikt linje mellan vad som ska klassas som landformer som är skapade endast av jökulhlaups eller som också ... |
format |
Other/Unknown Material |
author |
Bernhardson, Martin |
author_facet |
Bernhardson, Martin |
author_sort |
Bernhardson, Martin |
title |
Jökulhlaups: their associated landforms and landscape impacts |
title_short |
Jökulhlaups: their associated landforms and landscape impacts |
title_full |
Jökulhlaups: their associated landforms and landscape impacts |
title_fullStr |
Jökulhlaups: their associated landforms and landscape impacts |
title_full_unstemmed |
Jökulhlaups: their associated landforms and landscape impacts |
title_sort |
jökulhlaups: their associated landforms and landscape impacts |
publisher |
Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap |
publishDate |
2011 |
url |
http://lup.lub.lu.se/student-papers/record/2154389 |
long_lat |
ENVELOPE(-17.370,-17.370,63.848,63.848) ENVELOPE(13.870,13.870,66.151,66.151) |
geographic |
Skeiðarársandur Dammen |
geographic_facet |
Skeiðarársandur Dammen |
genre |
glacier Iceland |
genre_facet |
glacier Iceland |
op_relation |
http://lup.lub.lu.se/student-papers/record/2154389 |
_version_ |
1772814686357553152 |