Modeling vadose zone hydrological processes in naturally-occurring piezometric depressions. The Chari-Baguirmi region, southeastern of the Lake Chad Basin, Republic of Chad

The Chari-Baguirmi region, southeastern of the Lake Chad (Africa), has a wide naturally occurring piezometric depression with values deeper than the expected regional groundwater level. To date, the most widely accepted hypotheses to explain its origin and dynamics are based on lack of rainwater inf...

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Autores: Salehi Siavashani, Nafiseh|||0000-0001-5075-7317, Valdés Abellán, Javier, Do, Fréderic, Jiménez Martínez, Joaquín, Elorza Tenreiro, Francisco Javier, Candela Lledó, Lucila|||0000-0002-1659-6334, Serrat Capdevila, Aleix
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/393549
Acceso en línea:https://hdl.handle.net/2117/393549
https://dx.doi.org/10.1007/s12665-023-11100-0
Access Level:acceso abierto
Palabra clave:Hydrology
Rainwater
Hydrus 1D
Vadose zone
Piezometric depression
Chari Baguirmi
Hidrologia
Aigua de pluja
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Hidrologia subterrània
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spelling Modeling vadose zone hydrological processes in naturally-occurring piezometric depressions. The Chari-Baguirmi region, southeastern of the Lake Chad Basin, Republic of ChadSalehi Siavashani, Nafiseh|||0000-0001-5075-7317Valdés Abellán, JavierDo, FrédericJiménez Martínez, JoaquínElorza Tenreiro, Francisco JavierCandela Lledó, Lucila|||0000-0002-1659-6334Serrat Capdevila, AleixHydrologyRainwaterHydrus 1DVadose zonePiezometric depressionChari BaguirmiHidrologiaAigua de plujaÀrees temàtiques de la UPC::Enginyeria civil::Geologia::Hidrologia subterràniaThe Chari-Baguirmi region, southeastern of the Lake Chad (Africa), has a wide naturally occurring piezometric depression with values deeper than the expected regional groundwater level. To date, the most widely accepted hypotheses to explain its origin and dynamics are based on lack of rainwater infiltration and exfiltration processes. The code HYDRUS-1D is applied to numerically simulate the hydrological flow processes along the unsaturated zone in two soil profiles located in the central part and on the boundary of this piezometric depression under bare and vegetated soil coverage. The simulated time period is 2004–2015 with 715 mm annual rainfall average. The computed recharge with respect to total precipitation accounts for 21% on the boundary and 12% in the central part, which is limited by thick silty low permeability layer on the top surface. Considering modelling uncertainty and limitations under the simulated climatic conditions, the rainfall effect is observed only at upper soil layers, which leads to low aquifer recharge, while the upward water flux causing water table evaporation is very low. Past climate conditions, capable of developing a drying front to reach the water table after thousands of years of drying and geological structural constraints, may explain the current depressed area.Peer ReviewedSpringer20222022-06-0920232023-09-15journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/393549https://dx.doi.org/10.1007/s12665-023-11100-0reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3935492026-05-27T15:37:01Z
dc.title.none.fl_str_mv Modeling vadose zone hydrological processes in naturally-occurring piezometric depressions. The Chari-Baguirmi region, southeastern of the Lake Chad Basin, Republic of Chad
title Modeling vadose zone hydrological processes in naturally-occurring piezometric depressions. The Chari-Baguirmi region, southeastern of the Lake Chad Basin, Republic of Chad
spellingShingle Modeling vadose zone hydrological processes in naturally-occurring piezometric depressions. The Chari-Baguirmi region, southeastern of the Lake Chad Basin, Republic of Chad
Salehi Siavashani, Nafiseh|||0000-0001-5075-7317
Hydrology
Rainwater
Hydrus 1D
Vadose zone
Piezometric depression
Chari Baguirmi
Hidrologia
Aigua de pluja
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Hidrologia subterrània
title_short Modeling vadose zone hydrological processes in naturally-occurring piezometric depressions. The Chari-Baguirmi region, southeastern of the Lake Chad Basin, Republic of Chad
title_full Modeling vadose zone hydrological processes in naturally-occurring piezometric depressions. The Chari-Baguirmi region, southeastern of the Lake Chad Basin, Republic of Chad
title_fullStr Modeling vadose zone hydrological processes in naturally-occurring piezometric depressions. The Chari-Baguirmi region, southeastern of the Lake Chad Basin, Republic of Chad
title_full_unstemmed Modeling vadose zone hydrological processes in naturally-occurring piezometric depressions. The Chari-Baguirmi region, southeastern of the Lake Chad Basin, Republic of Chad
title_sort Modeling vadose zone hydrological processes in naturally-occurring piezometric depressions. The Chari-Baguirmi region, southeastern of the Lake Chad Basin, Republic of Chad
dc.creator.none.fl_str_mv Salehi Siavashani, Nafiseh|||0000-0001-5075-7317
Valdés Abellán, Javier
Do, Fréderic
Jiménez Martínez, Joaquín
Elorza Tenreiro, Francisco Javier
Candela Lledó, Lucila|||0000-0002-1659-6334
Serrat Capdevila, Aleix
author Salehi Siavashani, Nafiseh|||0000-0001-5075-7317
author_facet Salehi Siavashani, Nafiseh|||0000-0001-5075-7317
Valdés Abellán, Javier
Do, Fréderic
Jiménez Martínez, Joaquín
Elorza Tenreiro, Francisco Javier
Candela Lledó, Lucila|||0000-0002-1659-6334
Serrat Capdevila, Aleix
author_role author
author2 Valdés Abellán, Javier
Do, Fréderic
Jiménez Martínez, Joaquín
Elorza Tenreiro, Francisco Javier
Candela Lledó, Lucila|||0000-0002-1659-6334
Serrat Capdevila, Aleix
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Hydrology
Rainwater
Hydrus 1D
Vadose zone
Piezometric depression
Chari Baguirmi
Hidrologia
Aigua de pluja
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Hidrologia subterrània
topic Hydrology
Rainwater
Hydrus 1D
Vadose zone
Piezometric depression
Chari Baguirmi
Hidrologia
Aigua de pluja
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Hidrologia subterrània
description The Chari-Baguirmi region, southeastern of the Lake Chad (Africa), has a wide naturally occurring piezometric depression with values deeper than the expected regional groundwater level. To date, the most widely accepted hypotheses to explain its origin and dynamics are based on lack of rainwater infiltration and exfiltration processes. The code HYDRUS-1D is applied to numerically simulate the hydrological flow processes along the unsaturated zone in two soil profiles located in the central part and on the boundary of this piezometric depression under bare and vegetated soil coverage. The simulated time period is 2004–2015 with 715 mm annual rainfall average. The computed recharge with respect to total precipitation accounts for 21% on the boundary and 12% in the central part, which is limited by thick silty low permeability layer on the top surface. Considering modelling uncertainty and limitations under the simulated climatic conditions, the rainfall effect is observed only at upper soil layers, which leads to low aquifer recharge, while the upward water flux causing water table evaporation is very low. Past climate conditions, capable of developing a drying front to reach the water table after thousands of years of drying and geological structural constraints, may explain the current depressed area.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-06-09
2023
2023-09-15
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/393549
https://dx.doi.org/10.1007/s12665-023-11100-0
url https://hdl.handle.net/2117/393549
https://dx.doi.org/10.1007/s12665-023-11100-0
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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