Role of groundwater in the hydrology of a glacial catchment in continuous permafrost conditions in Spitsbergen (Austre Lovénbreen, 79°N : hydrodynamic and geochemical approaches
The hydrology, geochemistry and meteorology of a small, Arctic glacial watershed under continuous permafrost conditions (Austre Lovén glacier catchment area of 10 km2, western Spitsbergen, 79°N) were studied during the three hydrological years 2010, 2011 and 2012 to better define the role of suprape...
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2014
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Online Access: | https://theses.hal.science/tel-01127168 https://theses.hal.science/tel-01127168/document https://theses.hal.science/tel-01127168/file/2014PA112371.pdf |
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ftccsdartic:oai:HAL:tel-01127168v1 2023-05-15T15:05:54+02:00 Role of groundwater in the hydrology of a glacial catchment in continuous permafrost conditions in Spitsbergen (Austre Lovénbreen, 79°N : hydrodynamic and geochemical approaches Rôle des eaux souterraines dans l'hydrologie d'un bassin versant glaciaire sous condition de pergélisol continu au Spitsberg (Austre Lovénbreen, 79°N) : approches hydrodynamiques et géochimiques Quenet, Mélanie Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Université Paris Sud - Paris XI Christelle Marlin 2014-12-08 https://theses.hal.science/tel-01127168 https://theses.hal.science/tel-01127168/document https://theses.hal.science/tel-01127168/file/2014PA112371.pdf fr fre HAL CCSD NNT: 2014PA112371 tel-01127168 https://theses.hal.science/tel-01127168 https://theses.hal.science/tel-01127168/document https://theses.hal.science/tel-01127168/file/2014PA112371.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01127168 Hydrologie. Université Paris Sud - Paris XI, 2014. Français. ⟨NNT : 2014PA112371⟩ Spitsbergen Arctic Groundwater Glacial hydrology Water balance Permafrost Geochemistry Hydrologie glaciaire Géochimie Spitsberg Arctique Pergélisol Bilan hydrologique Eaux souterraines [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/doctoralThesis Theses 2014 ftccsdartic 2023-03-27T14:04:00Z The hydrology, geochemistry and meteorology of a small, Arctic glacial watershed under continuous permafrost conditions (Austre Lovén glacier catchment area of 10 km2, western Spitsbergen, 79°N) were studied during the three hydrological years 2010, 2011 and 2012 to better define the role of suprapermafrost groundwater on both water and solute fluxes at basin outlet. The runoff period occurs on average over a 141 days period (σ = 4.5 days) between May 9-10 and October 26-27. The mean total discharge is 0.940 m a-1 (σ = 0.156 m a-1) divided into 79 % of meltwater (54 % of snowmelt and icemelt from the glacier, 18 % of snowmelt from the slopes and 7 % of snowmelt from the proglacial area), 18 % of effective summer precipitation and 3% of perennial subglacial discharge. Uncertainties in quantifying the runoff components and the total discharge itself don’t allow more precise quantification of water fluxes from the suprapermafrost groundwater by water balance. This study would so show that the suprapermafrost groundwater component would be negligible in the water balance and only constitute a transit tank for water. Indeed, the potentiometric level monitoring shows that the water-table thaws and freezes at similar depths despite recharge events occurring during summer. Those recharge events mainly occur in favor of important rain events (cumulative amounts on 2 to 8 days higher that 20 mm). The water-table discharges towards rivers. The monitoring of ground temperature indicates that the frozen ground (supposed permafrost) top is located at a maximum depth of 2.50 m for a groundwater thickness reaching up to 1.70 m, or 70 % of the active layer. Thermal data show ground temperatures between 0 and - 0.5°C, close to thaw temperature, which let suppose a permafrost degradation between 2.50 and 3.40 m deep is about to occur due to climate warming. Consequently, the suprapermafrost groundwater aquifer (active layer) is expected to thicken. Geochemical data show an increase of the basin surface water mineralization by ... Doctoral or Postdoctoral Thesis Arctic Arctique* permafrost Spitsberg pergélisol Spitsbergen Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
Spitsbergen Arctic Groundwater Glacial hydrology Water balance Permafrost Geochemistry Hydrologie glaciaire Géochimie Spitsberg Arctique Pergélisol Bilan hydrologique Eaux souterraines [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
Spitsbergen Arctic Groundwater Glacial hydrology Water balance Permafrost Geochemistry Hydrologie glaciaire Géochimie Spitsberg Arctique Pergélisol Bilan hydrologique Eaux souterraines [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Quenet, Mélanie Role of groundwater in the hydrology of a glacial catchment in continuous permafrost conditions in Spitsbergen (Austre Lovénbreen, 79°N : hydrodynamic and geochemical approaches |
topic_facet |
Spitsbergen Arctic Groundwater Glacial hydrology Water balance Permafrost Geochemistry Hydrologie glaciaire Géochimie Spitsberg Arctique Pergélisol Bilan hydrologique Eaux souterraines [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
The hydrology, geochemistry and meteorology of a small, Arctic glacial watershed under continuous permafrost conditions (Austre Lovén glacier catchment area of 10 km2, western Spitsbergen, 79°N) were studied during the three hydrological years 2010, 2011 and 2012 to better define the role of suprapermafrost groundwater on both water and solute fluxes at basin outlet. The runoff period occurs on average over a 141 days period (σ = 4.5 days) between May 9-10 and October 26-27. The mean total discharge is 0.940 m a-1 (σ = 0.156 m a-1) divided into 79 % of meltwater (54 % of snowmelt and icemelt from the glacier, 18 % of snowmelt from the slopes and 7 % of snowmelt from the proglacial area), 18 % of effective summer precipitation and 3% of perennial subglacial discharge. Uncertainties in quantifying the runoff components and the total discharge itself don’t allow more precise quantification of water fluxes from the suprapermafrost groundwater by water balance. This study would so show that the suprapermafrost groundwater component would be negligible in the water balance and only constitute a transit tank for water. Indeed, the potentiometric level monitoring shows that the water-table thaws and freezes at similar depths despite recharge events occurring during summer. Those recharge events mainly occur in favor of important rain events (cumulative amounts on 2 to 8 days higher that 20 mm). The water-table discharges towards rivers. The monitoring of ground temperature indicates that the frozen ground (supposed permafrost) top is located at a maximum depth of 2.50 m for a groundwater thickness reaching up to 1.70 m, or 70 % of the active layer. Thermal data show ground temperatures between 0 and - 0.5°C, close to thaw temperature, which let suppose a permafrost degradation between 2.50 and 3.40 m deep is about to occur due to climate warming. Consequently, the suprapermafrost groundwater aquifer (active layer) is expected to thicken. Geochemical data show an increase of the basin surface water mineralization by ... |
author2 |
Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Université Paris Sud - Paris XI Christelle Marlin |
format |
Doctoral or Postdoctoral Thesis |
author |
Quenet, Mélanie |
author_facet |
Quenet, Mélanie |
author_sort |
Quenet, Mélanie |
title |
Role of groundwater in the hydrology of a glacial catchment in continuous permafrost conditions in Spitsbergen (Austre Lovénbreen, 79°N : hydrodynamic and geochemical approaches |
title_short |
Role of groundwater in the hydrology of a glacial catchment in continuous permafrost conditions in Spitsbergen (Austre Lovénbreen, 79°N : hydrodynamic and geochemical approaches |
title_full |
Role of groundwater in the hydrology of a glacial catchment in continuous permafrost conditions in Spitsbergen (Austre Lovénbreen, 79°N : hydrodynamic and geochemical approaches |
title_fullStr |
Role of groundwater in the hydrology of a glacial catchment in continuous permafrost conditions in Spitsbergen (Austre Lovénbreen, 79°N : hydrodynamic and geochemical approaches |
title_full_unstemmed |
Role of groundwater in the hydrology of a glacial catchment in continuous permafrost conditions in Spitsbergen (Austre Lovénbreen, 79°N : hydrodynamic and geochemical approaches |
title_sort |
role of groundwater in the hydrology of a glacial catchment in continuous permafrost conditions in spitsbergen (austre lovénbreen, 79°n : hydrodynamic and geochemical approaches |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://theses.hal.science/tel-01127168 https://theses.hal.science/tel-01127168/document https://theses.hal.science/tel-01127168/file/2014PA112371.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctique* permafrost Spitsberg pergélisol Spitsbergen |
genre_facet |
Arctic Arctique* permafrost Spitsberg pergélisol Spitsbergen |
op_source |
https://theses.hal.science/tel-01127168 Hydrologie. Université Paris Sud - Paris XI, 2014. Français. ⟨NNT : 2014PA112371⟩ |
op_relation |
NNT: 2014PA112371 tel-01127168 https://theses.hal.science/tel-01127168 https://theses.hal.science/tel-01127168/document https://theses.hal.science/tel-01127168/file/2014PA112371.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766337580290277376 |