Assessment by multivariate analysis of groundwater-surface water interactions in urbanized Mediterranean streams
dc.contributor.author
dc.date.accessioned
2016-10-25T07:08:20Z
dc.date.available
2016-10-25T07:08:20Z
dc.date.issued
2008-05-15
dc.identifier.issn
0022-1694
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dc.description.abstract
Streams in Mediterranean areas are characterized by a variable discharge regime with annual floods and droughts. Natural flow perturbations result in permanent and temporary rivers and, as a consequence, unique ecosystems. Human pressures such as treated and non-treated waste water discharge impact severely on these streams, since waste water dilution depends on river flow dynamics. Furthermore, their hydrological status worsens with the capture of stream discharge by surface or groundwater exploitation. Multivariate analysis has been widely used to analyze large sets of variables in environmental studies. In the present work, a hydrological study reinforced by principal component analysis (PCA), followed by cluster analysis of the PCA results, has been used to determine surface water origin and its interactions with groundwater in Mediterranean streams. The results show that hydrological observations are supported by PCA and cluster analysis. Additionally, this joint analysis makes it possible to observe the significance of the interaction between streams and aquifers in anthropized Mediterranean Basins. Groundwater exploitation can seriously impact on permanent streams, reducing their dilution capacity, and can even cause the capture of the whole stream discharge. Furthermore, good quality water contributions allow continuous stream flows and better waste water dilutions all year long. Finally, the results show that the presence and quality of surface water in temporary reaches during dry periods directly depends on groundwater contributions
dc.description.sponsorship
This project was funded by Grants from the Spanish government research Projects REN2002-04288-c02-01 and CICYT CGL-2005-08019-c04-02, and from the Patronat Francesc Eiximenis Grant (Diputació de Girona)
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application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
MICYT/2005-2008/CGL2005-08019-C04-02
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Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.jhydrol.2008.01.014
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© Journal of Hydrology, 2008, vol. 352, núm. 3-4, p. 355-366
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Articles publicats (D-CCAA)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Assessment by multivariate analysis of groundwater-surface water interactions in urbanized Mediterranean streams
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.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.contributor.funder