Assessment of paleo-recharge under the Fennoscandian Ice Sheet and its impact on regional groundwater flow in the northern Baltic Artesian Basin using a numerical model
The study investigates the mechanism of glacial meltwater recharge under the Fennosciandian Ice Sheet during the last glacial maximum (LGM) and its impact on regional groundwater flow in the northern Baltic Artesian Basin (BAB) in Estonia and Latvia. The current hypothesis is that a flow reversal oc...
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ftunivlavalcorp:oai:corpus.ulaval.ca:20.500.11794/38712 2024-06-23T07:52:45+00:00 Assessment of paleo-recharge under the Fennoscandian Ice Sheet and its impact on regional groundwater flow in the northern Baltic Artesian Basin using a numerical model Vaikmäe, Rein Sterckx, Arnaud Lemieux, Jean-Michel Pays baltes 2020-04-14T12:44:01Z application/pdf https://hdl.handle.net/20.500.11794/38712 https://doi.org/10.1007/s10040-018-1838-7 eng eng Springer 1431-2174 http://hdl.handle.net/20.500.11794/38712 doi:10.1007/s10040-018-1838-7 http://purl.org/coar/access_right/c_16ec Baltic states Numerical modeling Paleohydrology Stable isotopes Modèles mathématiques Paléohydrologie Isotopes stables article de recherche COAR1_1::Texte::Périodique::Revue::Contribution à un journal::Article::Article de recherche 2020 ftunivlavalcorp https://doi.org/20.500.11794/3871210.1007/s10040-018-1838-7 2024-06-10T23:42:53Z The study investigates the mechanism of glacial meltwater recharge under the Fennosciandian Ice Sheet during the last glacial maximum (LGM) and its impact on regional groundwater flow in the northern Baltic Artesian Basin (BAB) in Estonia and Latvia. The current hypothesis is that a flow reversal occurred in the BAB due to subglacial recharge during the LGM. This hypothesis is supported by an extensive dataset of geochemical and isotopic measurements in the groundwater of northern Estonia, exhibiting significant depletion in δ18O with respect to modern precipitation. To verify the consistency of this hypothesis and better understand groundwater flow dynamics during the LGM period, a numerical model is developed for this area. Two cross-sectional models have been created across the northern BAB, in which groundwater flow and the transport of δ18O have been simulated from the beginning of the LGM to present-day. Several simulations were performed with different subglacial boundary conditions, to investigate the uncertainty related to subglacial recharge of meltwater during the LGM and the subsequent flow reversal in the northern BAB. Several simulations provide a satisfying fit between computed and observed values of δ18O, which means that the hypothesis of subglacial recharge of meltwater is consistent with δ18O distribution. The numerical model suggests that preservation of meltwater in northern Estonia is controlled by confining layers and the proximity to the outcrop area of aquifers, located in the Gulf of Finland. The results also suggest that glacial meltwater has been preserved under the Baltic Sea in the Gulf of Riga. Other/Unknown Material Fennoscandian Ice Sheet Université Laval: CorpusUL Hydrogeology Journal 26 8 2793 2810 |
institution |
Open Polar |
collection |
Université Laval: CorpusUL |
op_collection_id |
ftunivlavalcorp |
language |
English |
topic |
Baltic states Numerical modeling Paleohydrology Stable isotopes Modèles mathématiques Paléohydrologie Isotopes stables |
spellingShingle |
Baltic states Numerical modeling Paleohydrology Stable isotopes Modèles mathématiques Paléohydrologie Isotopes stables Vaikmäe, Rein Sterckx, Arnaud Lemieux, Jean-Michel Assessment of paleo-recharge under the Fennoscandian Ice Sheet and its impact on regional groundwater flow in the northern Baltic Artesian Basin using a numerical model |
topic_facet |
Baltic states Numerical modeling Paleohydrology Stable isotopes Modèles mathématiques Paléohydrologie Isotopes stables |
description |
The study investigates the mechanism of glacial meltwater recharge under the Fennosciandian Ice Sheet during the last glacial maximum (LGM) and its impact on regional groundwater flow in the northern Baltic Artesian Basin (BAB) in Estonia and Latvia. The current hypothesis is that a flow reversal occurred in the BAB due to subglacial recharge during the LGM. This hypothesis is supported by an extensive dataset of geochemical and isotopic measurements in the groundwater of northern Estonia, exhibiting significant depletion in δ18O with respect to modern precipitation. To verify the consistency of this hypothesis and better understand groundwater flow dynamics during the LGM period, a numerical model is developed for this area. Two cross-sectional models have been created across the northern BAB, in which groundwater flow and the transport of δ18O have been simulated from the beginning of the LGM to present-day. Several simulations were performed with different subglacial boundary conditions, to investigate the uncertainty related to subglacial recharge of meltwater during the LGM and the subsequent flow reversal in the northern BAB. Several simulations provide a satisfying fit between computed and observed values of δ18O, which means that the hypothesis of subglacial recharge of meltwater is consistent with δ18O distribution. The numerical model suggests that preservation of meltwater in northern Estonia is controlled by confining layers and the proximity to the outcrop area of aquifers, located in the Gulf of Finland. The results also suggest that glacial meltwater has been preserved under the Baltic Sea in the Gulf of Riga. |
format |
Other/Unknown Material |
author |
Vaikmäe, Rein Sterckx, Arnaud Lemieux, Jean-Michel |
author_facet |
Vaikmäe, Rein Sterckx, Arnaud Lemieux, Jean-Michel |
author_sort |
Vaikmäe, Rein |
title |
Assessment of paleo-recharge under the Fennoscandian Ice Sheet and its impact on regional groundwater flow in the northern Baltic Artesian Basin using a numerical model |
title_short |
Assessment of paleo-recharge under the Fennoscandian Ice Sheet and its impact on regional groundwater flow in the northern Baltic Artesian Basin using a numerical model |
title_full |
Assessment of paleo-recharge under the Fennoscandian Ice Sheet and its impact on regional groundwater flow in the northern Baltic Artesian Basin using a numerical model |
title_fullStr |
Assessment of paleo-recharge under the Fennoscandian Ice Sheet and its impact on regional groundwater flow in the northern Baltic Artesian Basin using a numerical model |
title_full_unstemmed |
Assessment of paleo-recharge under the Fennoscandian Ice Sheet and its impact on regional groundwater flow in the northern Baltic Artesian Basin using a numerical model |
title_sort |
assessment of paleo-recharge under the fennoscandian ice sheet and its impact on regional groundwater flow in the northern baltic artesian basin using a numerical model |
publisher |
Springer |
publishDate |
2020 |
url |
https://hdl.handle.net/20.500.11794/38712 https://doi.org/10.1007/s10040-018-1838-7 |
op_coverage |
Pays baltes |
genre |
Fennoscandian Ice Sheet |
genre_facet |
Fennoscandian Ice Sheet |
op_relation |
1431-2174 http://hdl.handle.net/20.500.11794/38712 doi:10.1007/s10040-018-1838-7 |
op_rights |
http://purl.org/coar/access_right/c_16ec |
op_doi |
https://doi.org/20.500.11794/3871210.1007/s10040-018-1838-7 |
container_title |
Hydrogeology Journal |
container_volume |
26 |
container_issue |
8 |
container_start_page |
2793 |
op_container_end_page |
2810 |
_version_ |
1802644123347320832 |