Pore water pressure variations in Subpermafrost groundwater : Numerical modeling compared with experimental modeling

International audience Development and degradation of permafrost directly affect numerous hydrogeological processes such as thermal regime, exchange between river and groundwater, groundwater flows patterns and groundwater recharge (Michel, 1994). Groundwater in permafrost area is subdivided into tw...

Full description

Bibliographic Details
Main Authors: Rivière, Agnès, Goncalves, Julio, Jost, Anne, Font, Marianne
Other Authors: Centre de Géosciences (GEOSCIENCES), Mines Paris - PSL (École nationale supérieure des mines de Paris), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL), Structure et fonctionnement des systèmes hydriques continentaux (SISYPHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Mines Paris - PSL (École nationale supérieure des mines de Paris), Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Morphodynamique Continentale et Côtière (M2C), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), EGU
Format: Conference Object
Language:English
Published: HAL CCSD 2010
Subjects:
Ice
Online Access:https://hal.science/hal-01396214
https://hal.science/hal-01396214/document
https://hal.science/hal-01396214/file/EGU2010-10970-3.pdf
id ftsorbonneuniv:oai:HAL:hal-01396214v1
record_format openpolar
spelling ftsorbonneuniv:oai:HAL:hal-01396214v1 2024-09-15T18:11:35+00:00 Pore water pressure variations in Subpermafrost groundwater : Numerical modeling compared with experimental modeling Rivière, Agnès Goncalves, Julio Jost, Anne Font, Marianne Centre de Géosciences (GEOSCIENCES) Mines Paris - PSL (École nationale supérieure des mines de Paris) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) Structure et fonctionnement des systèmes hydriques continentaux (SISYPHE) Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Mines Paris - PSL (École nationale supérieure des mines de Paris) Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) EGU Vienne, Austria 2010-05-02 https://hal.science/hal-01396214 https://hal.science/hal-01396214/document https://hal.science/hal-01396214/file/EGU2010-10970-3.pdf en eng HAL CCSD hal-01396214 https://hal.science/hal-01396214 https://hal.science/hal-01396214/document https://hal.science/hal-01396214/file/EGU2010-10970-3.pdf info:eu-repo/semantics/OpenAccess Geophysical Research Abstracts EGU General Assembly https://hal.science/hal-01396214 EGU General Assembly, EGU, May 2010, Vienne, Austria. pp.191 - 195 [PHYS]Physics [physics] [SDE]Environmental Sciences [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/conferenceObject Conference papers 2010 ftsorbonneuniv 2024-08-30T00:00:54Z International audience Development and degradation of permafrost directly affect numerous hydrogeological processes such as thermal regime, exchange between river and groundwater, groundwater flows patterns and groundwater recharge (Michel, 1994). Groundwater in permafrost area is subdivided into two zones: suprapermafrost and subpermafrost which are separated by permafrost. As a result of the volumetric expansion of water upon freezing and assuming ice lenses and frost heave do not form freezing in a saturated aquifer, the progressive formation of permafrost leads to the pressurization of the subpermafrost groundwater (Wang, 2006). Therefore disappearance or aggradation of permafrost modifies the confined or unconfined state of subpermafrost groundwater. Our study focuses on modifications of pore water pressure of subpermafrost groundwater which could appear during thawing and freezing of soil. Numerical simulation allows elucidation of some of these processes. Our numerical model accounts for phase changes for coupled heat transport and variably saturated flow involving cycles of freezing and thawing. The flow model is a combination of a one-dimensional channel flow model which uses Manning–Strickler equation and a two-dimensional vertically groundwater flow model using Richards equation. Numerical simulation of heat transport consisted in a two dimensional model accounting for the effects of latent heat of phase change of water associated with melting/freezing cycles which incorporated the advection-diffusion equation describing heat-transfer in porous media. The change of hydraulic conductivity and thermal conductivity are considered by our numerical model. The model was evaluated by comparing predictions with data from laboratory freezing experiments. Experimental design was undertaken at the Laboratory M2C (Univesité de Caen-Basse Normandie, CNRS, France). The device consisted of a Plexiglas box insulated on all sides except on the top. Precipitation and ambient temperature are imposed. The Plexiglas box ... Conference Object Ice permafrost HAL Sorbonne Université
institution Open Polar
collection HAL Sorbonne Université
op_collection_id ftsorbonneuniv
language English
topic [PHYS]Physics [physics]
[SDE]Environmental Sciences
[SDU]Sciences of the Universe [physics]
spellingShingle [PHYS]Physics [physics]
[SDE]Environmental Sciences
[SDU]Sciences of the Universe [physics]
Rivière, Agnès
Goncalves, Julio
Jost, Anne
Font, Marianne
Pore water pressure variations in Subpermafrost groundwater : Numerical modeling compared with experimental modeling
topic_facet [PHYS]Physics [physics]
[SDE]Environmental Sciences
[SDU]Sciences of the Universe [physics]
description International audience Development and degradation of permafrost directly affect numerous hydrogeological processes such as thermal regime, exchange between river and groundwater, groundwater flows patterns and groundwater recharge (Michel, 1994). Groundwater in permafrost area is subdivided into two zones: suprapermafrost and subpermafrost which are separated by permafrost. As a result of the volumetric expansion of water upon freezing and assuming ice lenses and frost heave do not form freezing in a saturated aquifer, the progressive formation of permafrost leads to the pressurization of the subpermafrost groundwater (Wang, 2006). Therefore disappearance or aggradation of permafrost modifies the confined or unconfined state of subpermafrost groundwater. Our study focuses on modifications of pore water pressure of subpermafrost groundwater which could appear during thawing and freezing of soil. Numerical simulation allows elucidation of some of these processes. Our numerical model accounts for phase changes for coupled heat transport and variably saturated flow involving cycles of freezing and thawing. The flow model is a combination of a one-dimensional channel flow model which uses Manning–Strickler equation and a two-dimensional vertically groundwater flow model using Richards equation. Numerical simulation of heat transport consisted in a two dimensional model accounting for the effects of latent heat of phase change of water associated with melting/freezing cycles which incorporated the advection-diffusion equation describing heat-transfer in porous media. The change of hydraulic conductivity and thermal conductivity are considered by our numerical model. The model was evaluated by comparing predictions with data from laboratory freezing experiments. Experimental design was undertaken at the Laboratory M2C (Univesité de Caen-Basse Normandie, CNRS, France). The device consisted of a Plexiglas box insulated on all sides except on the top. Precipitation and ambient temperature are imposed. The Plexiglas box ...
author2 Centre de Géosciences (GEOSCIENCES)
Mines Paris - PSL (École nationale supérieure des mines de Paris)
Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)
Structure et fonctionnement des systèmes hydriques continentaux (SISYPHE)
Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE)
Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Mines Paris - PSL (École nationale supérieure des mines de Paris)
Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)
Morphodynamique Continentale et Côtière (M2C)
Université de Caen Normandie (UNICAEN)
Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN)
Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)
EGU
format Conference Object
author Rivière, Agnès
Goncalves, Julio
Jost, Anne
Font, Marianne
author_facet Rivière, Agnès
Goncalves, Julio
Jost, Anne
Font, Marianne
author_sort Rivière, Agnès
title Pore water pressure variations in Subpermafrost groundwater : Numerical modeling compared with experimental modeling
title_short Pore water pressure variations in Subpermafrost groundwater : Numerical modeling compared with experimental modeling
title_full Pore water pressure variations in Subpermafrost groundwater : Numerical modeling compared with experimental modeling
title_fullStr Pore water pressure variations in Subpermafrost groundwater : Numerical modeling compared with experimental modeling
title_full_unstemmed Pore water pressure variations in Subpermafrost groundwater : Numerical modeling compared with experimental modeling
title_sort pore water pressure variations in subpermafrost groundwater : numerical modeling compared with experimental modeling
publisher HAL CCSD
publishDate 2010
url https://hal.science/hal-01396214
https://hal.science/hal-01396214/document
https://hal.science/hal-01396214/file/EGU2010-10970-3.pdf
op_coverage Vienne, Austria
genre Ice
permafrost
genre_facet Ice
permafrost
op_source Geophysical Research Abstracts
EGU General Assembly
https://hal.science/hal-01396214
EGU General Assembly, EGU, May 2010, Vienne, Austria. pp.191 - 195
op_relation hal-01396214
https://hal.science/hal-01396214
https://hal.science/hal-01396214/document
https://hal.science/hal-01396214/file/EGU2010-10970-3.pdf
op_rights info:eu-repo/semantics/OpenAccess
_version_ 1810449171864354816