Impacts of Climate Change on Irrigated Agriculture in the Maipo Basin, Chile: Reliability of Water Rights and Changes in the Demand for Irrigation

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dc.contributor.authorMeza, Francisco J.
dc.contributor.authorWilks, Daniel S.
dc.contributor.authorGurovich, Luis
dc.contributor.authorBambach, Nicolas
dc.date.accessioned2024-01-10T13:13:42Z
dc.date.available2024-01-10T13:13:42Z
dc.date.issued2012
dc.description.abstractAgricultural regions located in snowmelt-dominated Mediterranean climate basins have been identified as being highly vulnerable to the impacts of climate change. The Maipo basin in central Chile is one such region. Projections of future climate conditions suggest major challenges for this basin. Precipitation levels are projected to decrease by the end of the century, and temperature levels in the mountains are expected to increase by around 3-4 degrees C. Such changes would affect both river discharge and irrigation water demand. This paper illustrates potential climate change impacts on the hydroclimatological regime of the Maipo basin, focusing on irrigated agriculture and its demands on water use rights. The impact assessment was carried out by combining a multisite stochastic weather generator with a disaggregation technique for historical monthly flows of the Maipo river at El Manzano. Demand for irrigation was simulated with a daily water budget model. Data showed that water demands from irrigated agriculture tend to increase as a consequence of the simulated changes in temperature and precipitation. The magnitudes of these changes depend on crop types and their prevalence in the region. It was concluded that the reliability of water allocations under the current water rights system may be strongly negatively affected. In particular, projected hydrological impacts for the climate change scenario considered indicate that the 15th percentile currently used as the basis for water rights may become the 40th or 50th percentile in the future, suggesting that present water allocations will become overcommitted. DOI: 10.1061/(ASCE)WR.1943-5452.0000216. (C) 2012 American Society of Civil Engineers.
dc.description.funderInter-American Institute for Global Change Research (IAI) SGP-HD
dc.description.funderUS National Science Foundation
dc.description.funderFondo Nacionald de Desarrollo Cientifico y Tecnologico (FONDECYT)
dc.fechaingreso.objetodigital2024-04-25
dc.format.extent10 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1061/(ASCE)WR.1943-5452.0000216
dc.identifier.eissn1943-5452
dc.identifier.issn0733-9496
dc.identifier.urihttps://doi.org/10.1061/(ASCE)WR.1943-5452.0000216
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78331
dc.identifier.wosidWOS:000313359200006
dc.information.autorucAgronomía e Ing. Forestal;L. Gurovich;S/I;98942
dc.information.autorucAgronomía e Ing. Forestal;Meza, F. J.;S/I;86534
dc.information.autorucIngeniería;N. Bambach;S/I;203798
dc.issue.numero5
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final430
dc.pagina.inicio421
dc.publisherASCE-AMER SOC CIVIL ENGINEERS
dc.revistaJOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT
dc.rightsacceso restringido
dc.subjectClimate change
dc.subjectIrrigation
dc.subjectWater allocation
dc.subjectChile
dc.subjectSTOCHASTIC SIMULATION
dc.subjectDAILY PRECIPITATION
dc.subjectTEMPERATURE
dc.subjectPROJECTIONS
dc.subjectRESOLUTION
dc.subject.ods06 Clean Water and Sanitation
dc.subject.ods13 Climate Action
dc.subject.odspa06 Agua limpia y saneamiento
dc.subject.odspa13 Acción por el clima
dc.titleImpacts of Climate Change on Irrigated Agriculture in the Maipo Basin, Chile: Reliability of Water Rights and Changes in the Demand for Irrigation
dc.typeartículo
dc.volumen138
sipa.codpersvinculados98942
sipa.codpersvinculados86534
sipa.codpersvinculados203798
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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