32 résultat(s) recherche sur le mot-clé 'WATER RESOURCES'    

  trié(s) par (Pertinence décroissant(e), Titre croissant(e)) 

Charting out the future agricultural trade and its impact on water resources / M. Tuninetti in Science of the Total Environment, vol. 714 (20 April 2020)  

Public ISBD [article]  inScience of the Total Environment > vol. 714 (20 April 2020) . - p. 1-12 Titre : Charting out the future agricultural trade and its impact on water resources Type de document : objet à 3 dimensions, artefacts, ... Auteurs : M. Tuninetti, Auteur ; F. Laio ; L. Ridolfi, Auteur Année de publication : 2020 Article en page(s) : p. 1-12 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : A HISTOIRE - Pays et ensemble de pays:Histoire du Monde Rural:Agriculture ; F POPULATIONS - ETUDES DE CAS:Economic development ; F POPULATIONS - ETUDES DE CAS:Environmental impact ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Pollution:Pollution de l'eau Mots-clés : 07 - ENVIRONNEMENT  7.3 - Eau. Gestion de l'Eau  AGRICULTURAL TRADE  COMMERCE AGRICOLE  WATER RESOURCES  RESSOURCE EN EAU  HUMAN FEEDING  ALIMENTATION HUMAINE  FEED INDUSTRY  INDUSTRIE DE L'ALIMENTATION ANIMALE  WATER FOOTPRINT  EMPREINTE HYDRIQUE  IMPACT SUR L'ENVIRONNEMENT  WATER POLLUTION  WATER USE  UTILISATION DE L'EAU  DEVELOPPEMENT ECONOMIQUE Résumé : International agricultural trade triggers inter-dependency among distant countries, not only in economic terms but also under an environmental perspective. Agricultural trade has been shown to drive environmental threats pertaining to biodiversity loss and depletion and pollution of freshwater resources. Meanwhile, trade can also encourage production where it is most efficient, hence minimizing the use of natural resources required by agriculture. In this study, we provide a country-level assessment of the future international trade for 6 primary crops and 3 animal products composing 70% of the human diet caloric content. We set up four variegate socio-economic scenarios with different level of economic developments, diets habits, population growth dynamics, and levels of market liberalization. Results show that the demand of agricultural goods and the correspondent trade flow will increase with respect to current levels by 10–50% and 74–178% by 2050, respectively. The largest increase in the amount of traded goods is expected under the Economic Optimism scenario that will see an average trade flow of 2830 kcal/cap/day (i.e., nearly doubling the current per-capita flow). Most of the increase will be driven by the trade of crops for animal feeding, particularly maize will be the most traded crop. The trade networks architecture in 2050 and 2080 will be very different from the one we actually know, with a clear shift of the trade pole from the Western toward the Eastern economies. The dramatic changes of global food-sources and trade patterns will jeopardize the water resources of new regions while exacerbating the pressure in those areas that will continue serving food also in the future. In spite of this, trade may annually save around 40–60 m3 of water per person, compared to a situation where countries are self-sufficient. En ligne : https://doi.org/10.1016/j.scitotenv.2020.136626 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=248118 [article] Charting out the future agricultural trade and its impact on water resources [objet à 3 dimensions, artefacts, ...] / M. Tuninetti, Auteur ; F. Laio ; L. Ridolfi, Auteur . - 2020 . - p. 1-12. Langues : Anglais (eng) Langues originales : Anglais (eng) in Science of the Total Environment > vol. 714 (20 April 2020) . - p. 1-12 Catégories : A HISTOIRE - Pays et ensemble de pays:Histoire du Monde Rural:Agriculture ; F POPULATIONS - ETUDES DE CAS:Economic development ; F POPULATIONS - ETUDES DE CAS:Environmental impact ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Pollution:Pollution de l'eau Mots-clés : 07 - ENVIRONNEMENT  7.3 - Eau. Gestion de l'Eau  AGRICULTURAL TRADE  COMMERCE AGRICOLE  WATER RESOURCES  RESSOURCE EN EAU  HUMAN FEEDING  ALIMENTATION HUMAINE  FEED INDUSTRY  INDUSTRIE DE L'ALIMENTATION ANIMALE  WATER FOOTPRINT  EMPREINTE HYDRIQUE  IMPACT SUR L'ENVIRONNEMENT  WATER POLLUTION  WATER USE  UTILISATION DE L'EAU  DEVELOPPEMENT ECONOMIQUE Résumé : International agricultural trade triggers inter-dependency among distant countries, not only in economic terms but also under an environmental perspective. Agricultural trade has been shown to drive environmental threats pertaining to biodiversity loss and depletion and pollution of freshwater resources. Meanwhile, trade can also encourage production where it is most efficient, hence minimizing the use of natural resources required by agriculture. In this study, we provide a country-level assessment of the future international trade for 6 primary crops and 3 animal products composing 70% of the human diet caloric content. We set up four variegate socio-economic scenarios with different level of economic developments, diets habits, population growth dynamics, and levels of market liberalization. Results show that the demand of agricultural goods and the correspondent trade flow will increase with respect to current levels by 10–50% and 74–178% by 2050, respectively. The largest increase in the amount of traded goods is expected under the Economic Optimism scenario that will see an average trade flow of 2830 kcal/cap/day (i.e., nearly doubling the current per-capita flow). Most of the increase will be driven by the trade of crops for animal feeding, particularly maize will be the most traded crop. The trade networks architecture in 2050 and 2080 will be very different from the one we actually know, with a clear shift of the trade pole from the Western toward the Eastern economies. The dramatic changes of global food-sources and trade patterns will jeopardize the water resources of new regions while exacerbating the pressure in those areas that will continue serving food also in the future. In spite of this, trade may annually save around 40–60 m3 of water per person, compared to a situation where countries are self-sufficient. En ligne : https://doi.org/10.1016/j.scitotenv.2020.136626 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=248118

L'eau : ressources, exploitation, concurrence / L. Cavazza in Comptes rendus de l'Académie d'agriculture de France, vol. 80, n. 9 (1994)

Public ISBD [article]  inComptes rendus de l'Académie d'agriculture de France > vol. 80, n. 9 (1994) . - p. 11-48 Titre : L'eau : ressources, exploitation, concurrence Titre original : Water: Resources, exploitation, competition Type de document : objet à 3 dimensions, artefacts, ... Auteurs : L. Cavazza Année de publication : 1994 Article en page(s) : p. 11-48 Langues : Français (fre) Langues originales : Anglais (eng) Français (fre) Catégories : C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Economie:Conditions économiques:Comportement économique:Production:Productivité ; C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Génie civil, militaire et minier:Technologie hydraulique:Irrigation ; F POPULATIONS - ETUDES DE CAS:Demand Mots-clés : 07 - ENVIRONNEMENT  7.3 - Eau. Gestion de l'Eau  MEDITERRANEAN REGION  REGION MEDITERRANEENNE  WATER RESOURCES  RESSOURCE EN EAU  MEDITERRANEAN CLIMATE  CLIMAT MEDITERRANEEN  WATER MANAGEMENT  GESTION DES EAUX  DEMANDE  IRRIGATION WATER  EAU D'IRRIGATION  PRODUCTIVITY Résumé : Le rôle des ressources hydriques dans la région méditerranéenne est fondamental. L'article passe d'abord en revue la disponibilité des ressources en eau : les eaux de surface, 92 pour-cent de l'apport des rivières à la Méditerranée provient du côté Nord. Les nappes phréatiques utilisables par l'agriculture ne sont pas suffisamment répertoriées bien que ravitaillées par les pluies; les nappes d'eau fossile elles constituent une ressource non renouvelable. La demande d'eau potable de bonne qualité augmente avec le tourisme et l'industrialisation. L'agriculture - grosse consommatrice d'eau - ne contribue pas toujours à une intensification de l'irrigation et à une optimisation de la ressource en eau. Le scénario retenu est celui d'un développement économique modéré respectant l'environnement et utilisant les ressources en eau judicieusement dans les pays méditerranéens Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=137142 [article] L'eau : ressources, exploitation, concurrence = Water: Resources, exploitation, competition [objet à 3 dimensions, artefacts, ...] / L. Cavazza . - 1994 . - p. 11-48. Langues : Français (fre) Langues originales : Anglais (eng) Français (fre) in Comptes rendus de l'Académie d'agriculture de France > vol. 80, n. 9 (1994) . - p. 11-48 Catégories : C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Economie:Conditions économiques:Comportement économique:Production:Productivité ; C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Génie civil, militaire et minier:Technologie hydraulique:Irrigation ; F POPULATIONS - ETUDES DE CAS:Demand Mots-clés : 07 - ENVIRONNEMENT  7.3 - Eau. Gestion de l'Eau  MEDITERRANEAN REGION  REGION MEDITERRANEENNE  WATER RESOURCES  RESSOURCE EN EAU  MEDITERRANEAN CLIMATE  CLIMAT MEDITERRANEEN  WATER MANAGEMENT  GESTION DES EAUX  DEMANDE  IRRIGATION WATER  EAU D'IRRIGATION  PRODUCTIVITY Résumé : Le rôle des ressources hydriques dans la région méditerranéenne est fondamental. L'article passe d'abord en revue la disponibilité des ressources en eau : les eaux de surface, 92 pour-cent de l'apport des rivières à la Méditerranée provient du côté Nord. Les nappes phréatiques utilisables par l'agriculture ne sont pas suffisamment répertoriées bien que ravitaillées par les pluies; les nappes d'eau fossile elles constituent une ressource non renouvelable. La demande d'eau potable de bonne qualité augmente avec le tourisme et l'industrialisation. L'agriculture - grosse consommatrice d'eau - ne contribue pas toujours à une intensification de l'irrigation et à une optimisation de la ressource en eau. Le scénario retenu est celui d'un développement économique modéré respectant l'environnement et utilisant les ressources en eau judicieusement dans les pays méditerranéens Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=137142

Evaluating water resources management scenarios considering the hierarchical structure of decision-makers and ecosystem services-based criteria / M. Behboudian in Science of the Total Environment, vol. 751 (10 January 2021)  

Public ISBD [article]  inScience of the Total Environment > vol. 751 (10 January 2021) . - p. 1-14 Titre : Evaluating water resources management scenarios considering the hierarchical structure of decision-makers and ecosystem services-based criteria Type de document : objet à 3 dimensions, artefacts, ... Auteurs : M. Behboudian, Auteur ; S. Ashrafi ; K. Motlaghzadeh ; R. Kerachian, Auteur Année de publication : 2021 Article en page(s) : p. 1-14 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Administration et gestion:Technique de gestion:Recherche opérationnelle:Scénario ; C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Administration et gestion:Technique de gestion:Recherche opérationnelle:Théorie des jeux ; S SCIENCES ET TECHNIQUES:Hydrologie:Ressources en eau:Eau de surface:Lac ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Catastrophe:Catastrophe naturelle:Sécheresse Mots-clés : 07 - ENVIRONNEMENT  7.3 - Eau. Gestion de l'Eau  LAKES  WATER MANAGEMENT  GESTION DES EAUX  WATER RESOURCES  RESSOURCE EN EAU  ECOSYSTEM SERVICES  SERVICE ECOSYSTEMIQUE  DROUGHT  WATER SUPPLY  APPROVISIONNEMENT EN EAU  IRRIGATION WATER  EAU D'IRRIGATION  GAME THEORY  MIDDLE EAST  MOYEN ORIENT Résumé : This paper introduces a new methodology for evaluating water resources management scenarios considering different aspects of their hydrological ecosystem services. The temporal variations of supplied water to different demands are assessed as provisioning hydrological ecosystem services. Then, three agricultural drought management policies have been defined for each water supply-demand alternative to reduce the irrigation water and cultivated area of the agricultural demand nodes during droughts. In addition to the net primary productivity criterion (NPP) and economic profit, the ecological condition of the system has been evaluated as an ecosystem services-based criterion. To prioritize and select the best water resources management (WRM) scenario(s), a game theory-based hierarchical evidential reasoning (ER) technique with multiple decision-makers has been used. The proposed methodology has been applied to the Urmia Lake basin, which is the largest saline lake in the Middle East. The grade-based values of the criteria have been used to compare the WRM scenarios. The results show that a scenario that includes supplying 100% of the lake's water demand has the highest priority. This scenario also suggests reducing the cultivated area of dominant crops and using deficit irrigation practices. En ligne : https://doi.org/10.1016/j.scitotenv.2020.141759 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=255515 [article] Evaluating water resources management scenarios considering the hierarchical structure of decision-makers and ecosystem services-based criteria [objet à 3 dimensions, artefacts, ...] / M. Behboudian, Auteur ; S. Ashrafi ; K. Motlaghzadeh ; R. Kerachian, Auteur . - 2021 . - p. 1-14. Langues : Anglais (eng) Langues originales : Anglais (eng) in Science of the Total Environment > vol. 751 (10 January 2021) . - p. 1-14 Catégories : C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Administration et gestion:Technique de gestion:Recherche opérationnelle:Scénario ; C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Administration et gestion:Technique de gestion:Recherche opérationnelle:Théorie des jeux ; S SCIENCES ET TECHNIQUES:Hydrologie:Ressources en eau:Eau de surface:Lac ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Catastrophe:Catastrophe naturelle:Sécheresse Mots-clés : 07 - ENVIRONNEMENT  7.3 - Eau. Gestion de l'Eau  LAKES  WATER MANAGEMENT  GESTION DES EAUX  WATER RESOURCES  RESSOURCE EN EAU  ECOSYSTEM SERVICES  SERVICE ECOSYSTEMIQUE  DROUGHT  WATER SUPPLY  APPROVISIONNEMENT EN EAU  IRRIGATION WATER  EAU D'IRRIGATION  GAME THEORY  MIDDLE EAST  MOYEN ORIENT Résumé : This paper introduces a new methodology for evaluating water resources management scenarios considering different aspects of their hydrological ecosystem services. The temporal variations of supplied water to different demands are assessed as provisioning hydrological ecosystem services. Then, three agricultural drought management policies have been defined for each water supply-demand alternative to reduce the irrigation water and cultivated area of the agricultural demand nodes during droughts. In addition to the net primary productivity criterion (NPP) and economic profit, the ecological condition of the system has been evaluated as an ecosystem services-based criterion. To prioritize and select the best water resources management (WRM) scenario(s), a game theory-based hierarchical evidential reasoning (ER) technique with multiple decision-makers has been used. The proposed methodology has been applied to the Urmia Lake basin, which is the largest saline lake in the Middle East. The grade-based values of the criteria have been used to compare the WRM scenarios. The results show that a scenario that includes supplying 100% of the lake's water demand has the highest priority. This scenario also suggests reducing the cultivated area of dominant crops and using deficit irrigation practices. En ligne : https://doi.org/10.1016/j.scitotenv.2020.141759 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=255515

Impacts of climate change on reservoir water availability, quality and irrigation needs in a water scarce Mediterranean region (southern Portugal) / J. Rocha in Science of the Total Environment, vol. 739 (20 September 2020)  

Public ISBD [article]  inScience of the Total Environment > vol. 739 (20 September 2020) . - p. 1-13 Titre : Impacts of climate change on reservoir water availability, quality and irrigation needs in a water scarce Mediterranean region (southern Portugal) Type de document : objet à 3 dimensions, artefacts, ... Auteurs : J. Rocha, Auteur ; J.J. Keizer ; P. Beça ; P. Diogo ; J.P. Nunes ; C. Carvalho-Santos, Auteur Année de publication : 2020 Article en page(s) : p. 1-13 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : A HISTOIRE - Pays et ensemble de pays:Histoire de l'Europe:Europe occidentale:Portugal ; C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Génie civil, militaire et minier:Technologie hydraulique:Irrigation ; F POPULATIONS - ETUDES DE CAS:Water requirements ; S SCIENCES ET TECHNIQUES:Administration de la science et de la recherche:Technologie:Technologie de pointe ; S SCIENCES ET TECHNIQUES:Approche scientifique:Méthode scientifique:Modèle de simulation Use only in connection with research and planning. ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatique Mots-clés : 07 - ENVIRONNEMENT  7.3 - Eau. Gestion de l'Eau  CLIMATIC CHANGE  BESOIN EN EAU  WATER RESERVOIRS  RESERVOIR D'EAU  WATER AVAILABITY  EAU DISPONIBLE  GLOBAL WARMING  RECHAUFFEMENT GLOBAL  WATER RESOURCES  RESSOURCE EN EAU  HIGH TECHNOLOGY  WATER SUPPLY  APPROVISIONNEMENT EN EAU  SIMULATION MODEL  MEDITERRANEAN REGION  REGION MEDITERRANEENNE Résumé : Future climate for the Mediterranean climatic region is expected to bring an increase in temperatures, decrease in the precipitation quantity and shifts in the seasonal precipitation pattern. Although the impacts of climate change on water resources have been relatively well explored for the Mediterranean climatic region, the specific consequences for reservoirs and, in particular, water availability and irrigation issues have been less studied. The objective of this work is two-fold: (i) to assess the impacts of future climate changes on water resources availability, quality (focusing on phosphorus loads as this is the limiting nutrient for eutrophication) and irrigation needs for two multipurpose reservoirs in southern Portugal; (ii) to suggest climate change adaptation strategies, especially for the agricultural sector. To this end, the SWAT model was first calibrated against existing data on reservoir inflows as well as phosphorus loads. Then, SWAT was run with climate derived EURO-CORDEX models (RCA4/RACMO22E) for four periods (1970–2000, 2010–2040, 2040–2070 and 2070–2100). Water availability was analysed using the Water Exploitation Index (WEI) that was calculated for both reservoirs combining changes of inflows and irrigation requirements. The results indicated that climate change will negatively impact water availability in both reservoirs, especially under RCP8.5. In the case of the Monte Novo reservoir, future domestic water supply could be constrained by water quality problems related with phosphorus loads. For Vigia reservoir, the high water exploitation will lead to water scarcity problems, mainly as this reservoir on present-day conditions is restrictive on irrigation requirements. Adaptation strategies such as the implementation of high end technology (e.g. soil moisture and plant water stress probes, satellite imagery and drones to evaluate water stress – NDVI) as well as the renewal of the irrigation network and adequate crop selection can help attenuating the effects of climate change on the water resources in this region. En ligne : https://doi.org/10.1016/j.scitotenv.2020.139477 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=248149 [article] Impacts of climate change on reservoir water availability, quality and irrigation needs in a water scarce Mediterranean region (southern Portugal) [objet à 3 dimensions, artefacts, ...] / J. Rocha, Auteur ; J.J. Keizer ; P. Beça ; P. Diogo ; J.P. Nunes ; C. Carvalho-Santos, Auteur . - 2020 . - p. 1-13. Langues : Anglais (eng) Langues originales : Anglais (eng) in Science of the Total Environment > vol. 739 (20 September 2020) . - p. 1-13 Catégories : A HISTOIRE - Pays et ensemble de pays:Histoire de l'Europe:Europe occidentale:Portugal ; C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Génie civil, militaire et minier:Technologie hydraulique:Irrigation ; F POPULATIONS - ETUDES DE CAS:Water requirements ; S SCIENCES ET TECHNIQUES:Administration de la science et de la recherche:Technologie:Technologie de pointe ; S SCIENCES ET TECHNIQUES:Approche scientifique:Méthode scientifique:Modèle de simulation Use only in connection with research and planning. ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatique Mots-clés : 07 - ENVIRONNEMENT  7.3 - Eau. Gestion de l'Eau  CLIMATIC CHANGE  BESOIN EN EAU  WATER RESERVOIRS  RESERVOIR D'EAU  WATER AVAILABITY  EAU DISPONIBLE  GLOBAL WARMING  RECHAUFFEMENT GLOBAL  WATER RESOURCES  RESSOURCE EN EAU  HIGH TECHNOLOGY  WATER SUPPLY  APPROVISIONNEMENT EN EAU  SIMULATION MODEL  MEDITERRANEAN REGION  REGION MEDITERRANEENNE Résumé : Future climate for the Mediterranean climatic region is expected to bring an increase in temperatures, decrease in the precipitation quantity and shifts in the seasonal precipitation pattern. Although the impacts of climate change on water resources have been relatively well explored for the Mediterranean climatic region, the specific consequences for reservoirs and, in particular, water availability and irrigation issues have been less studied. The objective of this work is two-fold: (i) to assess the impacts of future climate changes on water resources availability, quality (focusing on phosphorus loads as this is the limiting nutrient for eutrophication) and irrigation needs for two multipurpose reservoirs in southern Portugal; (ii) to suggest climate change adaptation strategies, especially for the agricultural sector. To this end, the SWAT model was first calibrated against existing data on reservoir inflows as well as phosphorus loads. Then, SWAT was run with climate derived EURO-CORDEX models (RCA4/RACMO22E) for four periods (1970–2000, 2010–2040, 2040–2070 and 2070–2100). Water availability was analysed using the Water Exploitation Index (WEI) that was calculated for both reservoirs combining changes of inflows and irrigation requirements. The results indicated that climate change will negatively impact water availability in both reservoirs, especially under RCP8.5. In the case of the Monte Novo reservoir, future domestic water supply could be constrained by water quality problems related with phosphorus loads. For Vigia reservoir, the high water exploitation will lead to water scarcity problems, mainly as this reservoir on present-day conditions is restrictive on irrigation requirements. Adaptation strategies such as the implementation of high end technology (e.g. soil moisture and plant water stress probes, satellite imagery and drones to evaluate water stress – NDVI) as well as the renewal of the irrigation network and adequate crop selection can help attenuating the effects of climate change on the water resources in this region. En ligne : https://doi.org/10.1016/j.scitotenv.2020.139477 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=248149

The impact of climate changes on the water footprint of wheat and maize production in the Nile Delta, Egypt / A. Elbeltagi in Science of the Total Environment, vol. 743 (15 November 2020)  

Public ISBD [article]  inScience of the Total Environment > vol. 743 (15 November 2020) . - p. 1-13 Titre : The impact of climate changes on the water footprint of wheat and maize production in the Nile Delta, Egypt Type de document : objet à 3 dimensions, artefacts, ... Auteurs : A. Elbeltagi, Auteur ; A. Srivastava ; B. Mehdinejadiani ; A. Malik ; J. Deng ; A.S. Bhatia ; M.R. Aslam, Auteur Année de publication : 2020 Article en page(s) : p. 1-13 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : A HISTOIRE - Pays et ensemble de pays:Afrique:Afrique du Nord:Égypte ; A HISTOIRE - Pays et ensemble de pays:Histoire du Monde Rural:Agroéconomie:Production agricole ; S SCIENCES ET TECHNIQUES:Météorologie:Hydrométéorologie:Cycle hydrologique:Évapotranspiration Water loss through evaporation. ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatique Mots-clés : 07 - ENVIRONNEMENT  7.3 - Eau. Gestion de l'Eau  CLIMATIC CHANGE  WATER FOOTPRINT  EMPREINTE HYDRIQUE  AGRICULTURAL PRODUCTION  WHEATS  BLE  MAIZE  MAIS  WATER USE  UTILISATION DE L'EAU  WATER RESOURCES  RESSOURCE EN EAU  CROP YIELD  RENDEMENT DES CULTURES  AGRICULTURAL SECTOR  SECTEUR AGRICOLE  NILE RIVER  NIL  EGYPT Résumé : Spatial-temporal information of different water resources is essential to rationally manage, sustainably develop, and optimally utilize water. This study focused on simulating future water footprint (WF) of two agronomically important crops (i.e., wheat and maize) using deep neural networks (DNN) method in Nile delta. DNN model was calibrated and validated by using 2006–2014 and 2015–2017 datasets. Moreover, future data (2022–2040) were obtained from three Representative Concentration Pathways (RCP) 2.6, 4.5, and 8.5, and incorporated into DNN prediction set. The findings showed that determination-coefficient between historical-predicted crop evapotranspiration (ETc) varied from 0.92 to 0.97 for two crops. The yield prediction values of wheat-maize deviated within the ranges of −3.21% to 3.47% and −4.93% to 5.88%, respectively. Based on the ensemble of RCP, precipitation was forecasted to decease by 667.40% and 261.73% in winter and summer in western as compared to eastern, respectively, which will ultimately be dropped to 105.02% and 60.87%, respectively parallel to historical. Therefore, the substantial fluctuations in precipitation caused an obvious decrease in green WF of wheat (i.e., 24.96% and 37.44%) in western and eastern, respectively. Additionally, for maize, it induced a 103.93% decrease in western and an 8.96% increase in eastern. Furthermore, increasing ETc by 8.46% and 12.45% gave rise to substantially increasing (i.e., 8.96% and 17.21%) in western for wheat-maize compared to the east, respectively. Likewise, grey wheat-maize WF findings reveals that there was an increase of 3.07% and 5.02% in western as compared to −14.51% and 12.37% in eastern. Hence, our results highly recommend the optimal use of the eastern delta to save blue-water by 16.58% and 40.25% of total requirements for wheat-maize in contrast to others. Overall, the current research framework and results derived from the adopted methodology will help in optimal planning of future water under climate change in the agricultural sector. En ligne : https://doi.org/10.1016/j.scitotenv.2020.140770 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=255522 [article] The impact of climate changes on the water footprint of wheat and maize production in the Nile Delta, Egypt [objet à 3 dimensions, artefacts, ...] / A. Elbeltagi, Auteur ; A. Srivastava ; B. Mehdinejadiani ; A. Malik ; J. Deng ; A.S. Bhatia ; M.R. Aslam, Auteur . - 2020 . - p. 1-13. Langues : Anglais (eng) Langues originales : Anglais (eng) in Science of the Total Environment > vol. 743 (15 November 2020) . - p. 1-13 Catégories : A HISTOIRE - Pays et ensemble de pays:Afrique:Afrique du Nord:Égypte ; A HISTOIRE - Pays et ensemble de pays:Histoire du Monde Rural:Agroéconomie:Production agricole ; S SCIENCES ET TECHNIQUES:Météorologie:Hydrométéorologie:Cycle hydrologique:Évapotranspiration Water loss through evaporation. ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatique Mots-clés : 07 - ENVIRONNEMENT  7.3 - Eau. Gestion de l'Eau  CLIMATIC CHANGE  WATER FOOTPRINT  EMPREINTE HYDRIQUE  AGRICULTURAL PRODUCTION  WHEATS  BLE  MAIZE  MAIS  WATER USE  UTILISATION DE L'EAU  WATER RESOURCES  RESSOURCE EN EAU  CROP YIELD  RENDEMENT DES CULTURES  AGRICULTURAL SECTOR  SECTEUR AGRICOLE  NILE RIVER  NIL  EGYPT Résumé : Spatial-temporal information of different water resources is essential to rationally manage, sustainably develop, and optimally utilize water. This study focused on simulating future water footprint (WF) of two agronomically important crops (i.e., wheat and maize) using deep neural networks (DNN) method in Nile delta. DNN model was calibrated and validated by using 2006–2014 and 2015–2017 datasets. Moreover, future data (2022–2040) were obtained from three Representative Concentration Pathways (RCP) 2.6, 4.5, and 8.5, and incorporated into DNN prediction set. The findings showed that determination-coefficient between historical-predicted crop evapotranspiration (ETc) varied from 0.92 to 0.97 for two crops. The yield prediction values of wheat-maize deviated within the ranges of −3.21% to 3.47% and −4.93% to 5.88%, respectively. Based on the ensemble of RCP, precipitation was forecasted to decease by 667.40% and 261.73% in winter and summer in western as compared to eastern, respectively, which will ultimately be dropped to 105.02% and 60.87%, respectively parallel to historical. Therefore, the substantial fluctuations in precipitation caused an obvious decrease in green WF of wheat (i.e., 24.96% and 37.44%) in western and eastern, respectively. Additionally, for maize, it induced a 103.93% decrease in western and an 8.96% increase in eastern. Furthermore, increasing ETc by 8.46% and 12.45% gave rise to substantially increasing (i.e., 8.96% and 17.21%) in western for wheat-maize compared to the east, respectively. Likewise, grey wheat-maize WF findings reveals that there was an increase of 3.07% and 5.02% in western as compared to −14.51% and 12.37% in eastern. Hence, our results highly recommend the optimal use of the eastern delta to save blue-water by 16.58% and 40.25% of total requirements for wheat-maize in contrast to others. Overall, the current research framework and results derived from the adopted methodology will help in optimal planning of future water under climate change in the agricultural sector. En ligne : https://doi.org/10.1016/j.scitotenv.2020.140770 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=255522

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