Assessment of the water supply: demand ratios in a Mediterranean basin under different global change scenarios and mitigation alternatives
dc.contributor.author
dc.date.accessioned
2016-11-23T09:20:02Z
dc.date.available
2016-11-23T09:20:02Z
dc.date.issued
2014-02-01
dc.identifier.issn
0048-9697
dc.identifier.uri
dc.description.abstract
Spatial differences in the supply and demand of ecosystem services such as water provisioning often imply that the demand for ecosystem services cannot be fulfilled at the local scale, but it can be fulfilled at larger scales (regional, continental). Differences in the supply:demand (S:D) ratio for a given service result in different values, and these differences might be assessed with monetary or non-monetary metrics. Water scarcity occurs where and when water resources are not enough to meet all the demands, and this affects equally the service of water provisioning and the ecosystem needs. In this study we assess the value of water in a Mediterranean basin under different global change (i.e. both climate and anthropogenic changes) and mitigation scenarios, with a non-monetary metric: the S:. D ratio. We computed water balances across the Ebro basin (North-East Spain) with the spatially explicit InVEST model. We highlight the spatial and temporal mismatches existing across a single hydrological basin regarding water provisioning and its consumption, considering or not, the environmental demand (environmental flow). The study shows that water scarcity is commonly a local issue (sub-basin to region), but that all demands are met at the largest considered spatial scale (basin). This was not the case in the worst-case scenario (increasing demands and decreasing supply), as the S:. D ratio at the basin scale was near 1, indicating that serious problems of water scarcity might occur in the near future even at the basin scale. The analysis of possible mitigation scenarios reveals that the impact of global change may be counteracted by the decrease of irrigated areas. Furthermore, the comparison between a non-monetary (S:D ratio) and a monetary (water price) valuation metrics reveals that the S:. D ratio provides similar values and might be therefore used as a spatially explicit metric to valuate the ecosystem service water provisioning
dc.description.sponsorship
This project was funded by the Spanish Ministry of Science and Innovation through the SCARCE project (Consolider-Ingenio 2010 CSD2009-00065), and by a Marie Curie European Reintegration Grant (PERG07-GA-2010-259219) within the 7th European Community Framework Programme
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
info:eu-repo/grantAgreement/MICINN//CSD2009-00065/ES/Evaluación y predicción de los efectos del cambio global en la cantidad y la calidad del agua en ríos ibéricos/
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.scitotenv.2013.10.003
dc.relation.ispartof
© Science of the Total Environment, 2014, vol. 470-471, p. 567-577
dc.relation.ispartofseries
Articles publicats (ICRA)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Assessment of the water supply: demand ratios in a Mediterranean basin under different global change scenarios and mitigation alternatives
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.relation.projectID
info:eu-repo/grantAgreement/EC/FP7/259219/EU/Global warming effects on the stream carbon balance/GWESCB
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.contributor.funder
dc.relation.FundingProgramme
dc.relation.ProjectAcronym