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TitleLong-term climate sensitivity of an integrated water supply system: The role of irrigation
AbstractThe assessment of the impact of long-term climate variability on water supply systems depends not only on possible variations of the resources availability, but also on the variation of the demand. In this framework, a robust estimation of direct (climate induced) and indirect (anthropogenically induced) effects of climate change is mandatory to design mitigation measures, especially in those regions of the planet where the groundwater equilibrium is strongly perturbed by exploitations for irrigation purposes. The main goal of this contribution is to propose a comprehensive model that integrates distributed crop water requirements with surface and groundwater mass balance, able to consider management rules of the water supply system. The proposed overall model, implemented, calibrated and validated for the case study of the Fortore water supply system (Apulia region, South Italy), permits to simulate the conjunctive use of the water from a surface artificial reservoir and from groundwater. The relative contributions of groundwater recharges and withdrawals to the aquifer stress have been evaluated under different climate perturbations, with emphasis on irrigation practices. Results point out that irrigated agriculture primarily affects groundwater discharge, indicating that ecosystem services connected to river base flow are particularly exposed to climate variation in irrigated areas. Moreover, findings show that the recharge both to surface and to groundwater is mainly affected by drier climate conditions, while hotter conditions have a major impact on the water demand. The non-linearity arising from combined drier and hotter conditions may exacerbate the aquifer stress by exposing it to massive sea-water intrusion.
SourceScience of the total environment 565, pp. 68–81
KeywordsClimate variabilityImpact scenariosIrrigated areasWater managementWater supply system
JournalScience of the total environment
EditorElsevier, Lausanne ;, Paesi Bassi
Year2016
TypeArticolo in rivista
DOI10.1016/j.scitotenv.2016.04.157
AuthorsGuyennon N.; Romano E.; Portoghese I.
Text354907 2016 10.1016/j.scitotenv.2016.04.157 Scopus 2 s2.0 84964819351 ISI Web of Science WOS WOS 000378206300006 Climate variability Impact scenarios Irrigated areas Water management Water supply system Long term climate sensitivity of an integrated water supply system The role of irrigation Guyennon N.; Romano E.; Portoghese I. National Research Council, Water Research Institute, Via Salaria km 29, 300, Monterotondo, RM, 00015, Italy; National Research Council Water Research Institute, UOS Bari, Via F. De Blasio, 5, Bari, 70132, Italy The assessment of the impact of long term climate variability on water supply systems depends not only on possible variations of the resources availability, but also on the variation of the demand. In this framework, a robust estimation of direct climate induced and indirect anthropogenically induced effects of climate change is mandatory to design mitigation measures, especially in those regions of the planet where the groundwater equilibrium is strongly perturbed by exploitations for irrigation purposes. The main goal of this contribution is to propose a comprehensive model that integrates distributed crop water requirements with surface and groundwater mass balance, able to consider management rules of the water supply system. The proposed overall model, implemented, calibrated and validated for the case study of the Fortore water supply system Apulia region, South Italy , permits to simulate the conjunctive use of the water from a surface artificial reservoir and from groundwater. The relative contributions of groundwater recharges and withdrawals to the aquifer stress have been evaluated under different climate perturbations, with emphasis on irrigation practices. Results point out that irrigated agriculture primarily affects groundwater discharge, indicating that ecosystem services connected to river base flow are particularly exposed to climate variation in irrigated areas. Moreover, findings show that the recharge both to surface and to groundwater is mainly affected by drier climate conditions, while hotter conditions have a major impact on the water demand. The non linearity arising from combined drier and hotter conditions may exacerbate the aquifer stress by exposing it to massive sea water intrusion. 565 Published version http //www.scopus.com/inward/record.url eid=2 s2.0 84964819351 partnerID=q2rCbXpz Long term climate sensitivity of an integrated water supply system The role of irrigation Long term climate sensitivity of an integrated water supply system The role of irrigation 2016_guyennon_et_al_stoten.pdf Articolo in rivista Elsevier 0048 9697 Science of the total environment Science of the total environment Sci. total environ. ivan.portoghese PORTOGHESE IVAN emanuele.romano ROMANO EMANUELE nicolasdominique.guyennon GUYENNON NICOLAS DOMINIQUE