How global changes impact water resources ...
Document type :
Autre communication scientifique (congrès sans actes - poster - séminaire...)
Title :
How global changes impact water resources in a southern coastal metropolis? Case of Recife (Brazil)
Author(s) :
Cary, Lise [Auteur]
Bureau de Recherches Géologiques et Minières [BRGM]
Petelet-Giraud, Emmanuelle [Auteur]
Bureau de Recherches Géologiques et Minières [BRGM]
Cary, Paul [Auteur]
Centre de Recherche "Individus Epreuves Sociétés" - ULR 3589 [CeRIES]
Giglio-Jacquemot, Armelle [Auteur]
Groupe de recherches et d'études sociologiques du Centre-Ouest [EA 3815] [GRESCO [Poitiers, Limoges]]
Bertrand, Guillaume [Auteur]
Universidade de São Paulo = University of São Paulo [USP]
Aurouet, Axel [Auteur]
Hirata, Ricardo [Auteur]
Universidade de São Paulo = University of São Paulo [USP]
Melo, Ana [Auteur]
Centre de Recherche "Individus Epreuves Sociétés" - ULR 3589 [CeRIES]
Chatton, Eliot [Auteur]
Géosciences Rennes [GR]
Aquilina, Luc [Auteur]
Géosciences Rennes [GR]
Montenegro, Suzana [Auteur]
Bureau de Recherches Géologiques et Minières [BRGM]
Petelet-Giraud, Emmanuelle [Auteur]
Bureau de Recherches Géologiques et Minières [BRGM]
Cary, Paul [Auteur]
Centre de Recherche "Individus Epreuves Sociétés" - ULR 3589 [CeRIES]
Giglio-Jacquemot, Armelle [Auteur]
Groupe de recherches et d'études sociologiques du Centre-Ouest [EA 3815] [GRESCO [Poitiers, Limoges]]
Bertrand, Guillaume [Auteur]
Universidade de São Paulo = University of São Paulo [USP]
Aurouet, Axel [Auteur]
Hirata, Ricardo [Auteur]
Universidade de São Paulo = University of São Paulo [USP]
Melo, Ana [Auteur]
Centre de Recherche "Individus Epreuves Sociétés" - ULR 3589 [CeRIES]
Chatton, Eliot [Auteur]
Géosciences Rennes [GR]
Aquilina, Luc [Auteur]
Géosciences Rennes [GR]
Montenegro, Suzana [Auteur]
Conference title :
43rd IAH CONGRESS
City :
Montpellier
Country :
France
Start date of the conference :
2016-09-25
English keyword(s) :
coastal aquifer
transdisciplinary approach
global changes
groundwater
water governance
transdisciplinary approach
global changes
groundwater
water governance
HAL domain(s) :
Planète et Univers [physics]/Sciences de la Terre/Géochimie
English abstract : [en]
The Recife Metropolitan Region is a hot spot illustrating the problems of southern countries on water issues where water resources are threatened both for quantity and quality in the context of global changes. Based on a ...
Show more >The Recife Metropolitan Region is a hot spot illustrating the problems of southern countries on water issues where water resources are threatened both for quantity and quality in the context of global changes. Based on a transdisciplinary approach, the purpose of the study was to assess the impact of human activities on coastal aquifers, through the analysis of pressure on groundwater resources and their social and structural reasons, the identification of sources and mechanisms of groundwater quality degradation, and the evaluation of the impacts of global changes on water resources at the regional level. The methodology was based on a multi-isotopic fingerprinting of groundwater and surface water, on gas analyses, and on sociological and ethnographic investigations including ethno-photography to characterize the daily life of the Recife inhabitants facing the lack of water or its poor quality. The results revisit the aquifer system functioning. In the deep aquifers, the groundwater displays a residence time over 10 000 y with a residual salinity inherited from the Pleistocene marine transgressions. Their recharge is very limited resulting in large water level decrease. Inversed flow directions due to overexploitation favour leakage from the surficial contaminated aquifers. The access to water and its social perception vary according to the social environment and to the residence location of individuals. Access to water is more a political problem than a technical one. The public authorities tend to deny the difficulties of poor people, especially in times of drought. The discredit of the water and sanitation public actors, and political and institutional rivalries and fragmentation are obstacles to technical solutions implementation. Integrated water management is urgently needed knowing that local climatic scenarios predict a reduction of rainfall volume of 20% together with a sea level increase of 18-59 cm by 2100.Show less >
Show more >The Recife Metropolitan Region is a hot spot illustrating the problems of southern countries on water issues where water resources are threatened both for quantity and quality in the context of global changes. Based on a transdisciplinary approach, the purpose of the study was to assess the impact of human activities on coastal aquifers, through the analysis of pressure on groundwater resources and their social and structural reasons, the identification of sources and mechanisms of groundwater quality degradation, and the evaluation of the impacts of global changes on water resources at the regional level. The methodology was based on a multi-isotopic fingerprinting of groundwater and surface water, on gas analyses, and on sociological and ethnographic investigations including ethno-photography to characterize the daily life of the Recife inhabitants facing the lack of water or its poor quality. The results revisit the aquifer system functioning. In the deep aquifers, the groundwater displays a residence time over 10 000 y with a residual salinity inherited from the Pleistocene marine transgressions. Their recharge is very limited resulting in large water level decrease. Inversed flow directions due to overexploitation favour leakage from the surficial contaminated aquifers. The access to water and its social perception vary according to the social environment and to the residence location of individuals. Access to water is more a political problem than a technical one. The public authorities tend to deny the difficulties of poor people, especially in times of drought. The discredit of the water and sanitation public actors, and political and institutional rivalries and fragmentation are obstacles to technical solutions implementation. Integrated water management is urgently needed knowing that local climatic scenarios predict a reduction of rainfall volume of 20% together with a sea level increase of 18-59 cm by 2100.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :
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