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Évapotranspiration
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Water loss through evaporation.
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trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Ajouter le résultat dans votre panier Affiner la rechercheModeling impacts of future climate change on reservoir storages and irrigation water demands in a Mediterranean basin / M. Gorguner in Science of the Total Environment, vol. 748 (15 December 2020)
Titre : Modeling impacts of future climate change on reservoir storages and irrigation water demands in a Mediterranean basin Type de document : objet à 3 dimensions, artefacts, ... Auteurs : M. Gorguner, Auteur ; M.L. Kavvas, Auteur Année de publication : 2020 Article en page(s) : p. 1-20 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : A HISTOIRE - Pays et ensemble de pays:Ensembles économiques:Pays de l'OCDE:Turquie ; F POPULATIONS - ETUDES DE CAS:Water requirements ; S SCIENCES ET TECHNIQUES:Approche scientifique:Méthode scientifique:Modèle de simulation Use only in connection with research and planning.; S SCIENCES ET TECHNIQUES:Hydrologie:Gestion des ressources en eau:Conservation de l'eau:Stockage d'eau ; S SCIENCES ET TECHNIQUES:Hydrologie:Ressources en eau:Bilan hydriqueThe flow and storage in a hydrologic unit such as a drainage basin, a soil zone, a lake or reservoir and the relationship between evaporation, precipitation, runoff and the change in water storage.; S SCIENCES ET TECHNIQUES:Météorologie:Climatologie:Climat:Donnée climatique ; S SCIENCES ET TECHNIQUES:Météorologie:Hydrométéorologie:Cycle hydrologique:ÉvapotranspirationWater loss through evaporation.; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatiqueMots-clés : 07 - ENVIRONNEMENT 7.3 - Eau. Gestion de l'Eau SIMULATION MODEL CLIMATIC CHANGE WATER RESERVOIRS RESERVOIR D'EAU IRRIGATION WATER EAU D'IRRIGATION WATER STORAGE BESOIN EN EAU DYNAMIC MODELS MODELE DYNAMIQUE CLIMATIC DATA WATER BALANCE WATER MANAGEMENT GESTION DES EAUX PROJECTION PROJECTION MEDITERRANEAN REGION REGION MEDITERRANEENNE TURKEY Résumé : Water storage requirements in the Mediterranean region vary in time and are strongly affected by the local geography and climate conditions. The objective of this study is to assess the implications of climate change on the water balance of an agricultural reservoir in a Mediterranean-climate basin in Turkey throughout the 21st century. A monthly dynamic water balance model is developed to simulate the historical and future water availability in the reservoir. The model is driven by the fine-resolution dynamically downscaled climate data from four GCMs from the CMIP5 archive, namely CCSM4, GFDL-ESM2M, HadGEM2-ES, and MIROC5, under two different representative concentration pathway scenarios (RCP4.5 and RCP8.5), and the hydrologic data projected under the same scenarios. The reservoir outflows, including the reservoir evaporation and downstream irrigation water demands, are also modeled using the projected climate variables. The net irrigation water requirement of the crops in the irrigation system, seasonal evapotranspiration rates, and reservoir evaporation rates are estimated based on the Penman-Monteith Evapotranspiration method (FAO-56 Method). The study investigates whether the future water supply in the reservoir will be sufficient to meet the future irrigation water demands for the years from 2017 to 2100. The results show that under all eight modeled climate change projections, statistically significant increasing trends for the annual irrigation water demands are expected throughout the 21st century. Moreover, higher evapotranspiration rates are predicted under the ensemble average of the RCP8.5 projections, compared to those of the RCP4.5 projections. Ultimately, seven out of eight projections projected insufficient reservoir water levels during the 21st century, especially during the irrigation seasons when higher water demands are expected. These impacts indicate the importance of sustainable water resources management in the region to provide irrigation water from reservoirs, and to sustain agricultural productivity under projected water limitations due to climate change. En ligne : https://doi.org/10.1016/j.scitotenv.2020.141246 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=255520
in Science of the Total Environment > vol. 748 (15 December 2020) . - p. 1-20[article] Modeling impacts of future climate change on reservoir storages and irrigation water demands in a Mediterranean basin [objet à 3 dimensions, artefacts, ...] / M. Gorguner, Auteur ; M.L. Kavvas, Auteur . - 2020 . - p. 1-20.
Langues : Anglais (eng) Langues originales : Anglais (eng)
in Science of the Total Environment > vol. 748 (15 December 2020) . - p. 1-20
Catégories : A HISTOIRE - Pays et ensemble de pays:Ensembles économiques:Pays de l'OCDE:Turquie ; F POPULATIONS - ETUDES DE CAS:Water requirements ; S SCIENCES ET TECHNIQUES:Approche scientifique:Méthode scientifique:Modèle de simulation Use only in connection with research and planning.; S SCIENCES ET TECHNIQUES:Hydrologie:Gestion des ressources en eau:Conservation de l'eau:Stockage d'eau ; S SCIENCES ET TECHNIQUES:Hydrologie:Ressources en eau:Bilan hydriqueThe flow and storage in a hydrologic unit such as a drainage basin, a soil zone, a lake or reservoir and the relationship between evaporation, precipitation, runoff and the change in water storage.; S SCIENCES ET TECHNIQUES:Météorologie:Climatologie:Climat:Donnée climatique ; S SCIENCES ET TECHNIQUES:Météorologie:Hydrométéorologie:Cycle hydrologique:ÉvapotranspirationWater loss through evaporation.; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatiqueMots-clés : 07 - ENVIRONNEMENT 7.3 - Eau. Gestion de l'Eau SIMULATION MODEL CLIMATIC CHANGE WATER RESERVOIRS RESERVOIR D'EAU IRRIGATION WATER EAU D'IRRIGATION WATER STORAGE BESOIN EN EAU DYNAMIC MODELS MODELE DYNAMIQUE CLIMATIC DATA WATER BALANCE WATER MANAGEMENT GESTION DES EAUX PROJECTION PROJECTION MEDITERRANEAN REGION REGION MEDITERRANEENNE TURKEY Résumé : Water storage requirements in the Mediterranean region vary in time and are strongly affected by the local geography and climate conditions. The objective of this study is to assess the implications of climate change on the water balance of an agricultural reservoir in a Mediterranean-climate basin in Turkey throughout the 21st century. A monthly dynamic water balance model is developed to simulate the historical and future water availability in the reservoir. The model is driven by the fine-resolution dynamically downscaled climate data from four GCMs from the CMIP5 archive, namely CCSM4, GFDL-ESM2M, HadGEM2-ES, and MIROC5, under two different representative concentration pathway scenarios (RCP4.5 and RCP8.5), and the hydrologic data projected under the same scenarios. The reservoir outflows, including the reservoir evaporation and downstream irrigation water demands, are also modeled using the projected climate variables. The net irrigation water requirement of the crops in the irrigation system, seasonal evapotranspiration rates, and reservoir evaporation rates are estimated based on the Penman-Monteith Evapotranspiration method (FAO-56 Method). The study investigates whether the future water supply in the reservoir will be sufficient to meet the future irrigation water demands for the years from 2017 to 2100. The results show that under all eight modeled climate change projections, statistically significant increasing trends for the annual irrigation water demands are expected throughout the 21st century. Moreover, higher evapotranspiration rates are predicted under the ensemble average of the RCP8.5 projections, compared to those of the RCP4.5 projections. Ultimately, seven out of eight projections projected insufficient reservoir water levels during the 21st century, especially during the irrigation seasons when higher water demands are expected. These impacts indicate the importance of sustainable water resources management in the region to provide irrigation water from reservoirs, and to sustain agricultural productivity under projected water limitations due to climate change. En ligne : https://doi.org/10.1016/j.scitotenv.2020.141246 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=255520
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 climatiqueMots-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
in Science of the Total Environment > vol. 743 (15 November 2020) . - p. 1-13[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 climatiqueMots-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
