Improving the Methods for Processing Hard Rock Aquifers Boreholes’ Databases. Application to the Hydrodynamic Characterization of Metamorphic Aquifers from Western Côte d’Ivoire

Statistical analysis of a borehole database, linear discharges, and water strikes processing enabled an understanding of the structure, geometry and hydrodynamic properties of the metamorphic hard rock aquifers from the Montagnes District, Western Côte d’Ivoire. The database comprises 1654 boreholes...

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Autores principales:	Kouassi Aristide Aoulou, Severin Pistre, Yéï Marie Solange Oga, Benoît Dewandel, Patrick Lachassagne
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	groundwater hydrogeological conceptual model linear discharge saprolite mining impacts water strike Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/79b97b9e417245ef90a0abc2c30eb257
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spelling	oai:doaj.org-article:79b97b9e417245ef90a0abc2c30eb2572021-11-25T19:15:39ZImproving the Methods for Processing Hard Rock Aquifers Boreholes’ Databases. Application to the Hydrodynamic Characterization of Metamorphic Aquifers from Western Côte d’Ivoire10.3390/w132232192073-4441https://doaj.org/article/79b97b9e417245ef90a0abc2c30eb2572021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3219https://doaj.org/toc/2073-4441Statistical analysis of a borehole database, linear discharges, and water strikes processing enabled an understanding of the structure, geometry and hydrodynamic properties of the metamorphic hard rock aquifers from the Montagnes District, Western Côte d’Ivoire. The database comprises 1654 boreholes among which 445 only were usable for this research work after its pre-processing. Analysis shows that the structure of the aquifer is similar to that observed in several other areas in the world: it developed due to weathering processes, comprises the capacitive saprolite, 10–20 m thick on average, and an underlying transmissive fractured layer, overlying the unweathered impermeable hard rock. The fractured layer is 80 m thick, the first 40 to 45 metres being its most productive zone, with a 11.3 m<sup>3</sup>/h median productivity. This research shows that metamorphic aquifers exhibit similar aquifer properties (thickness, hydrodynamic parameters) as plutonic ones and that there is interest in using such databases for research and other purposes. However, a rigorous pre-treatment of the data is mandatory, and geological data from published maps must be used instead of the geological data from the database. A previous methodology aiming at processing the boreholes’ linear discharges was improved. It notably appears that the slope method must be preferred to the percentile method.Kouassi Aristide AoulouSeverin PistreYéï Marie Solange OgaBenoît DewandelPatrick LachassagneMDPI AGarticlegroundwaterhydrogeological conceptual modellinear dischargesaprolitemining impactswater strikeHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3219, p 3219 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	groundwater hydrogeological conceptual model linear discharge saprolite mining impacts water strike Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	groundwater hydrogeological conceptual model linear discharge saprolite mining impacts water strike Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Kouassi Aristide Aoulou Severin Pistre Yéï Marie Solange Oga Benoît Dewandel Patrick Lachassagne Improving the Methods for Processing Hard Rock Aquifers Boreholes’ Databases. Application to the Hydrodynamic Characterization of Metamorphic Aquifers from Western Côte d’Ivoire
description	Statistical analysis of a borehole database, linear discharges, and water strikes processing enabled an understanding of the structure, geometry and hydrodynamic properties of the metamorphic hard rock aquifers from the Montagnes District, Western Côte d’Ivoire. The database comprises 1654 boreholes among which 445 only were usable for this research work after its pre-processing. Analysis shows that the structure of the aquifer is similar to that observed in several other areas in the world: it developed due to weathering processes, comprises the capacitive saprolite, 10–20 m thick on average, and an underlying transmissive fractured layer, overlying the unweathered impermeable hard rock. The fractured layer is 80 m thick, the first 40 to 45 metres being its most productive zone, with a 11.3 m<sup>3</sup>/h median productivity. This research shows that metamorphic aquifers exhibit similar aquifer properties (thickness, hydrodynamic parameters) as plutonic ones and that there is interest in using such databases for research and other purposes. However, a rigorous pre-treatment of the data is mandatory, and geological data from published maps must be used instead of the geological data from the database. A previous methodology aiming at processing the boreholes’ linear discharges was improved. It notably appears that the slope method must be preferred to the percentile method.
format	article
author	Kouassi Aristide Aoulou Severin Pistre Yéï Marie Solange Oga Benoît Dewandel Patrick Lachassagne
author_facet	Kouassi Aristide Aoulou Severin Pistre Yéï Marie Solange Oga Benoît Dewandel Patrick Lachassagne
author_sort	Kouassi Aristide Aoulou
title	Improving the Methods for Processing Hard Rock Aquifers Boreholes’ Databases. Application to the Hydrodynamic Characterization of Metamorphic Aquifers from Western Côte d’Ivoire
title_short	Improving the Methods for Processing Hard Rock Aquifers Boreholes’ Databases. Application to the Hydrodynamic Characterization of Metamorphic Aquifers from Western Côte d’Ivoire
title_full	Improving the Methods for Processing Hard Rock Aquifers Boreholes’ Databases. Application to the Hydrodynamic Characterization of Metamorphic Aquifers from Western Côte d’Ivoire
title_fullStr	Improving the Methods for Processing Hard Rock Aquifers Boreholes’ Databases. Application to the Hydrodynamic Characterization of Metamorphic Aquifers from Western Côte d’Ivoire
title_full_unstemmed	Improving the Methods for Processing Hard Rock Aquifers Boreholes’ Databases. Application to the Hydrodynamic Characterization of Metamorphic Aquifers from Western Côte d’Ivoire
title_sort	improving the methods for processing hard rock aquifers boreholes’ databases. application to the hydrodynamic characterization of metamorphic aquifers from western côte d’ivoire
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/79b97b9e417245ef90a0abc2c30eb257
work_keys_str_mv	AT kouassiaristideaoulou improvingthemethodsforprocessinghardrockaquifersboreholesdatabasesapplicationtothehydrodynamiccharacterizationofmetamorphicaquifersfromwesterncotedivoire AT severinpistre improvingthemethodsforprocessinghardrockaquifersboreholesdatabasesapplicationtothehydrodynamiccharacterizationofmetamorphicaquifersfromwesterncotedivoire AT yeimariesolangeoga improvingthemethodsforprocessinghardrockaquifersboreholesdatabasesapplicationtothehydrodynamiccharacterizationofmetamorphicaquifersfromwesterncotedivoire AT benoitdewandel improvingthemethodsforprocessinghardrockaquifersboreholesdatabasesapplicationtothehydrodynamiccharacterizationofmetamorphicaquifersfromwesterncotedivoire AT patricklachassagne improvingthemethodsforprocessinghardrockaquifersboreholesdatabasesapplicationtothehydrodynamiccharacterizationofmetamorphicaquifersfromwesterncotedivoire
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Improving the Methods for Processing Hard Rock Aquifers Boreholes’ Databases. Application to the Hydrodynamic Characterization of Metamorphic Aquifers from Western Côte d’Ivoire

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