Climate change impacts on irrigation water requirements in the Guadalquivir river basin in Spain

Díaz, J.A. Rodríguez; Knox, Jerry W.; Camacho, E.

doi:10.1007/s10113-007-0035-3

Cited by 235 publications

(138 citation statements)

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“…For temperature absolute values were computed instead of relative changes. This methodology has already been applied for downscaling climate datasets by de Silva et al (2007) and Rodríguez Díaz et al (2007a). However, the baseline and HadCM3 climate change datasets do not contain reference evapotranspiration (ET 0 ) values; a technique developed by Hess and Knox (2003) was therefore used to calculate mean monthly ET 0 for each pixel for the baseline and each future SRES scenario.…”

Section: Methodsmentioning

confidence: 99%

“…Because of the predicted reduction in available water resources (Iglesias et al 2005), the change in annual distribution of rainfall (Moreno 2005) and in crop water requirements (Mínguez et al 2005), there will be an impact on the performance of irrigation systems. They will have to be designed for longer and higher peaks in irrigation water demand which may cause problems in some of the networks already working (Rodríguez Díaz et al 2007a). These uncertainties as to how irrigation systems will have to adapt to these changes are issues that water authorities are compelled to address (De Wrachien and Ragab 2004).…”

Section: Introductionmentioning

confidence: 99%

“…At the present time, climate change impact on agriculture has become a recurrent issue and many studies have been done (Rosenzweig et al 1995;Cuculeanu et al 1999;Guereña et al 2001;Tubiello and Fischer 2007;Meza et al 2008), some of them related to impact on irrigation (Allen et al 1991;McCabe and Wolock 1992;Doll 2002;De Silva et al 2007;Fischer et al 2007;Rodríguez Díaz et al 2007a;Yano et al 2007). However, the effect on irrigation distribution networks has not been tackled.…”

Section: Introductionmentioning

confidence: 99%

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Irrigation Distribution Networks’ Vulnerability to Climate Change

Pérez-Urrestarazu

Smout

Díaz

et al. 2010

J. Irrig. Drain Eng.

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Climate change will lead to changed demands on existing irrigation systems. This paper presents a methodology for investigating the performance of irrigation networks under climate change, and under the emission scenarios. European agricultural policy scenarios are used to predict future cropping patterns. Irrigation water requirements are then estimated for various combinations of these climate and cropping pattern scenarios, and the performance of the irrigation network is evaluated in terms of the equity and adequacy of pressure at the outlets, using EPANET. The methodology was applied to the Fuente Palmera irrigation district, which supplies water on-demand for drip irrigation.The results show that climate change would have a major impact on network performance with the existing cropping pattern, but that expected changes in cropping pattern would reduce this impact.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Irrigation Distribution Networks’ Vulnerability to Climate Change

Pérez-Urrestarazu

Smout

Díaz

et al. 2010

J. Irrig. Drain Eng.

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“…The impacts of a changing climate on irrigation demand in Spain have been assessed (Rodríguez Díaz et al, 2007) and, as in other Mediterranean countries, any increases in evapotranspiration (ET), coupled with changes in rainfall distribution, are expected to cause significant increases in agricultural water demand. Demand forecasts for the most common crops in the region were estimated to range from +15 to +25% for the 2050s to +25 to +35% for the 2080s (Rodríguez Díaz and Topcu, 2010).…”

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confidence: 99%

More ‘Crop per Drop’ – The Energy Trade-Off in Spanish Irrigated Agriculture

Díaz

2012

Outlook Agric

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“…In Spain, irrigation is the main water consumer, accounting for about 70% of total water demand (Iglesias et al, 2003;Rodríguez Díaz et al, 2007), so it is the most threatened sector by water scarcity. Many water bodies in Spain are at risk of not being able to comply with the requirements of the Water Framework Directive (WFD).…”

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confidence: 99%

Impact of climate change on maize’s water needs, yields and profitability under various water prices in Spain

Rey

Garrido

Mínguez

et al. 2011

Span. j. agric. res.

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Available water resources are expected to diminish in the Iberian Peninsula as a result of climate change (CC). Agricultural water use represents about 70% of all water uses in Spain. This paper uses a combination of an ensemble of climate change and crop models to analyze the impacts on maize's water needs, yields and economic profitability under various water prices. Maize's evapotranspiration (ET), irrigation needs and yield projections under CC are compared with those of current climate in nine sites of Spain. With these simulated data, maize's and water's prices are included in a stochastic model to simulate the crop's net margin, both under CC and current climate conditions. An adaptation strategy potentially useful for maize in Spain is also studied. Results show that such adaptation can reduce negative CC impact on yields. However, decreases in ET and irrigation needs will be lower with than without adaptation. This creates an ambiguous situation which can be affected or solved with water pricing policies. With higher water tariffs, crop's profitability can drop to negative levels, which may result in the abandoning of the crop in many areas. CC and water policies must be closely coordinated to ensure efficient water use and crops' profitability.Additional key words: adaptation; evapotranspiration; net margin; Regional Climate Models; uncertainty; Zea mays L. ResumenImpacto del cambio climático en el rendimiento y en las necesidades hídricas del maíz, y su rentabilidad bajo diferentes precios del agua en España La disponibilidad de recursos hídricos en la Península Ibérica va a disminuir como consecuencia del cambio climá-tico (CC). En España, el regadío representa cerca del 70% de la demanda total de agua. Este trabajo utiliza un conjunto de modelos climáticos y de cultivo para analizar el impacto en las necesidades hídricas del maíz, en su rendimiento, y en su margen neto bajo diferentes tarifas de agua. Las proyecciones de rendimiento, evapotranspiración (ET) y riego del maíz en el clima futuro han sido comparadas con las del clima actual en nueve zonas de España. También se han evaluado los datos relativos a una posible estrategia de adaptación de este cultivo. Los resultados muestran que esta estrategia puede reducir los impactos negativos del CC en el rendimiento del maíz. Sin embargo, la ET y la necesidad de riego serán mayores con adaptación que sin ella. Esto crea un efecto ambiguo, que puede verse afectado o resolverse con políticas de tarifación del agua. Con mayores niveles de tarifas, debido a una mayor escasez de recursos hídri-cos disponibles consecuencia del CC, la rentabilidad del maíz puede llegar a caer hasta valores negativos, lo que llevaría a su abandono en algunas zonas. Las políticas de CC y de agua deben estar bien coordinadas con el fin de asegurar la eficiencia del uso del agua, y la rentabilidad de los cultivos.Palabras clave adicionales: adaptación; evapotranspiración; incertidumbre; margen neto; Modelos Regionales de Clima; Zea mays L.

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Climate change impacts on irrigation water requirements in the Guadalquivir river basin in Spain

Cited by 235 publications

References 12 publications

Irrigation Distribution Networks’ Vulnerability to Climate Change

Irrigation Distribution Networks’ Vulnerability to Climate Change

More ‘Crop per Drop’ – The Energy Trade-Off in Spanish Irrigated Agriculture

Impact of climate change on maize’s water needs, yields and profitability under various water prices in Spain

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