[article]
| 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 |
in Science of the Total Environment > vol. 739 (20 September 2020) . - p. 1-13
[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 |
|
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