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Partager le résultat de cette rechercheMulti-decadal analysis of water resources and agricultural change in a Mediterranean semiarid irrigated piedmont under water scarcity and human interaction / Y. Ouassanouan in Science of the Total Environment, vol. 834 (15 August 2022)
Titre : Multi-decadal analysis of water resources and agricultural change in a Mediterranean semiarid irrigated piedmont under water scarcity and human interaction Type de document : objet à 3 dimensions, artefacts, ... Auteurs : Y. Ouassanouan ; M.H. Kharrou ; V. Simonneaux ; Y. Fakir ; A. Chehbouni ; F. Sguir ; M. Benrhanem ; I. Najar ; H. Bouimouass Année de publication : 2022 Article en page(s) : p. 1-15 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : A HISTOIRE - Pays et ensemble de pays:Afrique:Afrique du Nord:Maroc ; F POPULATIONS - ETUDES DE CAS:Highlands ; F POPULATIONS - ETUDES DE CAS:Semiarid zones ; S SCIENCES ET TECHNIQUES:Météorologie:Climatologie:Climat Average weather of any region.; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatiqueMots-clés : 07 - ENVIRONNEMENT 7.3 - Eau. Gestion de l'Eau WATER MANAGEMENT GESTION DES EAUX WATER RESOURCES RESSOURCE EN EAU SEMIARID CLIMATE CLIMAT SEMI ARIDE ZONE SEMI ARIDE IRRIGATED FARMING CULTURE IRRIGUEE CLIMATE CLIMATIC CHANGE REGION D'ALTITUDE MEDITERRANEAN REGION REGION MEDITERRANEENNE HIGH ATLAS HAUT ATLAS MOROCCO Résumé : Mediterranean piedmonts are an important hydro-agricultural systems. They constitute the junction between the mountains, where the streamflow is generated, and the surrounding plains, where the water is used. In Morocco, these traditional systems extend largely along the High Atlas Mountains. Yet, changing conditions in the Mediterranean basin as well as recurrent droughts in recent decades remain poorly understood in terms of hydrological and agricultural impacts, particularly in traditional hydro-agro-systems. The combined effects of climate variability and ineffective management of water resource dynamics may lead to increased water scarcity in these regions. The present work aims to assess the effects of climate variability and associated agricultural changes on water resources in a traditional irrigated piedmont of the Moroccan High Atlas. To that end, a trend analysis, together with change points detection, was carried out on annual and monthly precipitation, and streamflow from 1965 to 2018. Then, the standardized precipitation index (SPI) was employed to identify meteorological droughts. Also, groundwater, and spring discharge data were analyzed and discussed from 1973 to 2021. SPI outcomes revealed three major droughts, in 1981-1988, 1999-2008, and 2013-2018. Although the precipitation data showed no significant trend, except for Tahannaout station, the average annual precipitation over the piedmont area decreased by 28%. Similarly, streamflow decreased significantly by almost 40% for all stations, as did the Abainou spring's discharge. Consistent with that, groundwater level has declined dramatically over the past decades in the downstream piedmont. These decreases in water cycle components were tightly aligned with droughts. Yet, irrigation diversions were maintained in both dry and wet periods. Paradoxically, this decrease in water resources was associated with an agricultural transition from seasonal crops (cereals) to perennial crops (olive trees). This conversion is likely to amplify the water shortage, leading to groundwater resources overexploitation to satisfy the growing agricultural demand. En ligne : https://doi.org/10.1016/j.scitotenv.2022.155328 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=284596
in Science of the Total Environment > vol. 834 (15 August 2022) . - p. 1-15[article] Multi-decadal analysis of water resources and agricultural change in a Mediterranean semiarid irrigated piedmont under water scarcity and human interaction [objet à 3 dimensions, artefacts, ...] / Y. Ouassanouan ; M.H. Kharrou ; V. Simonneaux ; Y. Fakir ; A. Chehbouni ; F. Sguir ; M. Benrhanem ; I. Najar ; H. Bouimouass . - 2022 . - p. 1-15.
Langues : Anglais (eng) Langues originales : Anglais (eng)
in Science of the Total Environment > vol. 834 (15 August 2022) . - p. 1-15
Catégories : A HISTOIRE - Pays et ensemble de pays:Afrique:Afrique du Nord:Maroc ; F POPULATIONS - ETUDES DE CAS:Highlands ; F POPULATIONS - ETUDES DE CAS:Semiarid zones ; S SCIENCES ET TECHNIQUES:Météorologie:Climatologie:Climat Average weather of any region.; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatiqueMots-clés : 07 - ENVIRONNEMENT 7.3 - Eau. Gestion de l'Eau WATER MANAGEMENT GESTION DES EAUX WATER RESOURCES RESSOURCE EN EAU SEMIARID CLIMATE CLIMAT SEMI ARIDE ZONE SEMI ARIDE IRRIGATED FARMING CULTURE IRRIGUEE CLIMATE CLIMATIC CHANGE REGION D'ALTITUDE MEDITERRANEAN REGION REGION MEDITERRANEENNE HIGH ATLAS HAUT ATLAS MOROCCO Résumé : Mediterranean piedmonts are an important hydro-agricultural systems. They constitute the junction between the mountains, where the streamflow is generated, and the surrounding plains, where the water is used. In Morocco, these traditional systems extend largely along the High Atlas Mountains. Yet, changing conditions in the Mediterranean basin as well as recurrent droughts in recent decades remain poorly understood in terms of hydrological and agricultural impacts, particularly in traditional hydro-agro-systems. The combined effects of climate variability and ineffective management of water resource dynamics may lead to increased water scarcity in these regions. The present work aims to assess the effects of climate variability and associated agricultural changes on water resources in a traditional irrigated piedmont of the Moroccan High Atlas. To that end, a trend analysis, together with change points detection, was carried out on annual and monthly precipitation, and streamflow from 1965 to 2018. Then, the standardized precipitation index (SPI) was employed to identify meteorological droughts. Also, groundwater, and spring discharge data were analyzed and discussed from 1973 to 2021. SPI outcomes revealed three major droughts, in 1981-1988, 1999-2008, and 2013-2018. Although the precipitation data showed no significant trend, except for Tahannaout station, the average annual precipitation over the piedmont area decreased by 28%. Similarly, streamflow decreased significantly by almost 40% for all stations, as did the Abainou spring's discharge. Consistent with that, groundwater level has declined dramatically over the past decades in the downstream piedmont. These decreases in water cycle components were tightly aligned with droughts. Yet, irrigation diversions were maintained in both dry and wet periods. Paradoxically, this decrease in water resources was associated with an agricultural transition from seasonal crops (cereals) to perennial crops (olive trees). This conversion is likely to amplify the water shortage, leading to groundwater resources overexploitation to satisfy the growing agricultural demand. En ligne : https://doi.org/10.1016/j.scitotenv.2022.155328 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=284596
Titre : Perspectives for the irrigated agriculture in Alentejo Type de document : objet à 3 dimensions, artefacts, ... Auteurs : R.M. de Sousa Fragoso ; C.A.F. Marques Année de publication : 2003/03 Article en page(s) : p. 21-25 Présentation : 1 ill., 18 réf., 2 tabl. Langues : Anglais (eng) Langues originales : Anglais (eng) Français (fre) Catégories : A HISTOIRE - Pays et ensemble de pays:Histoire de l'Europe:Europe occidentale:Portugal ; A HISTOIRE - Pays et ensemble de pays:Histoire du Monde Rural:Agroéconomie:Développement agricole ; S SCIENCES ET TECHNIQUES:Mathématiques et statistiques:Statistique:Mathématiques statistiques:Modèle mathématique Mots-clés : ALENTEJO IRRIGATED FARMING CULTURE IRRIGUEE MATHEMATICAL MODELS AGRICULTURAL DEVELOPMENT Résumé : The Portuguese government has planned to irrigate 30 thousand hectares of land in the Alentejo region within 2006. About 26 thousand hectares are part of the Alqueva Project. This paper anticipates the main trends and perspectives of irrigated agriculture in the Alentejo region with respect to production options, farm income and resource use and returns. The methodology used is based on a discrete stochastic programming model that maximizes the producers' expected utility. It is a farm level model which includes the main structural characteristics of farm types and irrigated agricultural production options as well as different types of years for crop water use and total availability for farmers. Results show that irrigated agriculture development is a potential option to promote agricultural competitiveness, incomes and resources returns of farmers that benefit from those public investments in irrigated structures in the Alentejo region Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=137614
in New Medit > vol. 2, n. 1 (2003/03) . - p. 21-25[article] Perspectives for the irrigated agriculture in Alentejo [objet à 3 dimensions, artefacts, ...] / R.M. de Sousa Fragoso ; C.A.F. Marques . - 2003/03 . - p. 21-25 : 1 ill., 18 réf., 2 tabl.
Langues : Anglais (eng) Langues originales : Anglais (eng) Français (fre)
in New Medit > vol. 2, n. 1 (2003/03) . - p. 21-25
Catégories : A HISTOIRE - Pays et ensemble de pays:Histoire de l'Europe:Europe occidentale:Portugal ; A HISTOIRE - Pays et ensemble de pays:Histoire du Monde Rural:Agroéconomie:Développement agricole ; S SCIENCES ET TECHNIQUES:Mathématiques et statistiques:Statistique:Mathématiques statistiques:Modèle mathématique Mots-clés : ALENTEJO IRRIGATED FARMING CULTURE IRRIGUEE MATHEMATICAL MODELS AGRICULTURAL DEVELOPMENT Résumé : The Portuguese government has planned to irrigate 30 thousand hectares of land in the Alentejo region within 2006. About 26 thousand hectares are part of the Alqueva Project. This paper anticipates the main trends and perspectives of irrigated agriculture in the Alentejo region with respect to production options, farm income and resource use and returns. The methodology used is based on a discrete stochastic programming model that maximizes the producers' expected utility. It is a farm level model which includes the main structural characteristics of farm types and irrigated agricultural production options as well as different types of years for crop water use and total availability for farmers. Results show that irrigated agriculture development is a potential option to promote agricultural competitiveness, incomes and resources returns of farmers that benefit from those public investments in irrigated structures in the Alentejo region Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=137614
Titre : Climate change and industrialization as the main drivers of Spanish agriculture water stress Type de document : objet à 3 dimensions, artefacts, ... Auteurs : J. Vila-Traver ; M. González de Molina ; J. Infante-Amate ; E. Aguilera Année de publication : 2021 Article en page(s) : p. 1-10 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : A HISTOIRE - Pays et ensemble de pays:Histoire de l'Europe:Europe occidentale:Espagne ; A HISTOIRE - Pays et ensemble de pays:Histoire du Monde Rural:Agriculture ; C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Industrie:Économie industrielle:Développement industriel:Industrialisation Refers to the initial stage of industrial development.; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Catastrophe:Catastrophe naturelle:Sécheresse ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatiqueMots-clés : 07 - ENVIRONNEMENT 7.3 - Eau. Gestion de l'Eau DROUGHT DROUGHT STRESS STRESS DU A LA SECHERESSE CLIMATIC CHANGE GLOBAL WARMING RECHAUFFEMENT GLOBAL INDUSTRIALIZATION RESOURCE ALLOCATION AFFECTATION DE RESSOURCES WATER AVAILABITY EAU DISPONIBLE IRRIGATED FARMING CULTURE IRRIGUEE SPAIN Résumé : In recent decades, there has been growing concern regarding worsening global climate conditions for agricultural production, especially in Mediterranean climate and other semi-arid areas where the scarcity of water is a major problem. The objective of the study was to estimate the long-term evolution (in Spain, over 1922–2016) of the decoupling between crop's water requirements and the green water available, and to analyze the causes of the changes. The FA0–56 methodology was followed to estimate the green water, blue water and water stress of crops, via an explicit territorial distribution, using 0.5o grid cells. We propose a new indicator called Violet Water. This indicator groups together the water stress of the rainfed croplands and the blue water of the irrigated croplands, representing the components of this decoupling. Our results show that crops´ water requirements increased by 21% and violet water by 30% over the study period. The decomposition analysis used to study the drivers of these changes suggests that increasing reference evapotranspiration, caused by global warming, was the major driver triggering the growth of crop water requirements. Meanwhile, the changes in violet water values were mainly driven by the coupling of the cropland's spatiotemporal structure and climate change. The sensitivity analysis performed showed that the increasing trends in water stress, blue water and violet water were consistent for almost all the tested scenarios, but significant differences on the scale aroused depending on the climate data used (climate normal or each year climate) and specially on the geographical and historical Kc adjustment (crop-fixed Kc versus adjusted Kc). This highlights the importance of considering simultaneously the effect of the different factors, but also the need for refining this type of adjustment in future research. En ligne : https://doi.org/10.1016/j.scitotenv.2020.143399 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=272740
in Science of the Total Environment > vol. 760 (15 March 2021) . - p. 1-10[article] Climate change and industrialization as the main drivers of Spanish agriculture water stress [objet à 3 dimensions, artefacts, ...] / J. Vila-Traver ; M. González de Molina ; J. Infante-Amate ; E. Aguilera . - 2021 . - p. 1-10.
Langues : Anglais (eng) Langues originales : Anglais (eng)
in Science of the Total Environment > vol. 760 (15 March 2021) . - p. 1-10
Catégories : A HISTOIRE - Pays et ensemble de pays:Histoire de l'Europe:Europe occidentale:Espagne ; A HISTOIRE - Pays et ensemble de pays:Histoire du Monde Rural:Agriculture ; C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Industrie:Économie industrielle:Développement industriel:Industrialisation Refers to the initial stage of industrial development.; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Catastrophe:Catastrophe naturelle:Sécheresse ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatiqueMots-clés : 07 - ENVIRONNEMENT 7.3 - Eau. Gestion de l'Eau DROUGHT DROUGHT STRESS STRESS DU A LA SECHERESSE CLIMATIC CHANGE GLOBAL WARMING RECHAUFFEMENT GLOBAL INDUSTRIALIZATION RESOURCE ALLOCATION AFFECTATION DE RESSOURCES WATER AVAILABITY EAU DISPONIBLE IRRIGATED FARMING CULTURE IRRIGUEE SPAIN Résumé : In recent decades, there has been growing concern regarding worsening global climate conditions for agricultural production, especially in Mediterranean climate and other semi-arid areas where the scarcity of water is a major problem. The objective of the study was to estimate the long-term evolution (in Spain, over 1922–2016) of the decoupling between crop's water requirements and the green water available, and to analyze the causes of the changes. The FA0–56 methodology was followed to estimate the green water, blue water and water stress of crops, via an explicit territorial distribution, using 0.5o grid cells. We propose a new indicator called Violet Water. This indicator groups together the water stress of the rainfed croplands and the blue water of the irrigated croplands, representing the components of this decoupling. Our results show that crops´ water requirements increased by 21% and violet water by 30% over the study period. The decomposition analysis used to study the drivers of these changes suggests that increasing reference evapotranspiration, caused by global warming, was the major driver triggering the growth of crop water requirements. Meanwhile, the changes in violet water values were mainly driven by the coupling of the cropland's spatiotemporal structure and climate change. The sensitivity analysis performed showed that the increasing trends in water stress, blue water and violet water were consistent for almost all the tested scenarios, but significant differences on the scale aroused depending on the climate data used (climate normal or each year climate) and specially on the geographical and historical Kc adjustment (crop-fixed Kc versus adjusted Kc). This highlights the importance of considering simultaneously the effect of the different factors, but also the need for refining this type of adjustment in future research. En ligne : https://doi.org/10.1016/j.scitotenv.2020.143399 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=272740
Titre : A critical review of water resources in Greece: the key role of agricultural adaptation to climate-water effects Type de document : objet à 3 dimensions, artefacts, ... Auteurs : N.N. Kourgialas ; N.N. Kourgialas Année de publication : 2021 Article en page(s) : p. 1-16 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : A HISTOIRE - Pays et ensemble de pays:Histoire de l'Europe:Europe occidentale:Grèce ; A HISTOIRE - Pays et ensemble de pays:Histoire du Monde Rural:Agriculture ; 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 WATER MANAGEMENT GESTION DES EAUX WATER RESOURCES RESSOURCE EN EAU ADAPTATION ADAPTATION ADAPTATION TO CHANGE ADAPTATION AU CHANGEMENT CLIMATIC CHANGE WATER USE EFFICIENCY EFFICIENCE D'UTILISATION DE L'EAU IRRIGATED FARMING CULTURE IRRIGUEE GREECE Résumé : The management and protection of a country's water resources is a matter of high priority, ensuring the development and socio-economic stability of a country. Unquestionably, Greece is a characteristic example of this, as water distribution is highly spatially and temporally unequally distributed, while irrigation and tourist consumers as well as the pollution load are expected to be increased in the near future. Water resources in Greece are particularly affected by climate extremes, with droughts, floods and soil erosion by water being the utmost consequences. Greece consumes the greatest amount of its available water resources in the agricultural sector. Also, there is much evidence of water shortage and bad/poor chemical status of some water bodies, mainly due to saltwater intrusion in coastal agricultural areas and intensively agricultural activities. Therefore, this review provides a literature update on the quantity and quality aspects of water resources in Greece for each water body, focusing on water relation effects (aridity/drought, floods and soil erosion by water). This paper, based on different sources of information and an extensive database of water related data, collects, evaluates and groups data from a quantity and quality point of view for all the different water bodies of Greece. Specific water districts such as the Aegean islands, the eastern part of Crete, Attica and Thessaly are expected to be the most affected by climate-water impacts with reduced crops yields, a greater risk of droughts and/or floods, a loss of agricultural land, declining water availability, and degraded water resources (surface and groundwater). Based on these findings, the proposed review highlights agricultural adaptation practices for increasing water use efficiency, ensuring the sustainability of water resources in Greece. En ligne : https://doi.org/10.1016/j.scitotenv.2021.145857 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=272720
in Science of the Total Environment > vol. 775 (25 June 2021) . - p. 1-16[article] A critical review of water resources in Greece: the key role of agricultural adaptation to climate-water effects [objet à 3 dimensions, artefacts, ...] / N.N. Kourgialas ; N.N. Kourgialas . - 2021 . - p. 1-16.
Langues : Anglais (eng) Langues originales : Anglais (eng)
in Science of the Total Environment > vol. 775 (25 June 2021) . - p. 1-16
Catégories : A HISTOIRE - Pays et ensemble de pays:Histoire de l'Europe:Europe occidentale:Grèce ; A HISTOIRE - Pays et ensemble de pays:Histoire du Monde Rural:Agriculture ; 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 WATER MANAGEMENT GESTION DES EAUX WATER RESOURCES RESSOURCE EN EAU ADAPTATION ADAPTATION ADAPTATION TO CHANGE ADAPTATION AU CHANGEMENT CLIMATIC CHANGE WATER USE EFFICIENCY EFFICIENCE D'UTILISATION DE L'EAU IRRIGATED FARMING CULTURE IRRIGUEE GREECE Résumé : The management and protection of a country's water resources is a matter of high priority, ensuring the development and socio-economic stability of a country. Unquestionably, Greece is a characteristic example of this, as water distribution is highly spatially and temporally unequally distributed, while irrigation and tourist consumers as well as the pollution load are expected to be increased in the near future. Water resources in Greece are particularly affected by climate extremes, with droughts, floods and soil erosion by water being the utmost consequences. Greece consumes the greatest amount of its available water resources in the agricultural sector. Also, there is much evidence of water shortage and bad/poor chemical status of some water bodies, mainly due to saltwater intrusion in coastal agricultural areas and intensively agricultural activities. Therefore, this review provides a literature update on the quantity and quality aspects of water resources in Greece for each water body, focusing on water relation effects (aridity/drought, floods and soil erosion by water). This paper, based on different sources of information and an extensive database of water related data, collects, evaluates and groups data from a quantity and quality point of view for all the different water bodies of Greece. Specific water districts such as the Aegean islands, the eastern part of Crete, Attica and Thessaly are expected to be the most affected by climate-water impacts with reduced crops yields, a greater risk of droughts and/or floods, a loss of agricultural land, declining water availability, and degraded water resources (surface and groundwater). Based on these findings, the proposed review highlights agricultural adaptation practices for increasing water use efficiency, ensuring the sustainability of water resources in Greece. En ligne : https://doi.org/10.1016/j.scitotenv.2021.145857 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=272720
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