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A new method to map groundwater-dependent ecosystem zones in semi-arid environments: A case study in Chile

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dc.contributor.authorDuran-Llacer, Iongel
dc.contributor.authorArumi, José Luis
dc.contributor.authorArriagada, Loretto
dc.contributor.authorAguayo, Mauricio
dc.contributor.authorRojas, Octavio
dc.contributor.authorGonzález-Rodríguez, Lisdelys
dc.contributor.authorRodríguez-López, Lien
dc.contributor.authorMartínez-Retureta, Rebeca
dc.contributor.authorOyarzún, Ricardo
dc.contributor.authorKumar Singh, Sudhir
dc.date.accessioned2023-07-11T20:27:05Z
dc.date.available2023-07-11T20:27:05Z
dc.date.issued2022
dc.description.abstractGroundwater (GW) use has intensified in recent decades, threatening the ecological integrity of groundwater-dependent ecosystems (GDEs). The study of GDEs is limited; therefore, integrated, interdisciplinary environmental approaches that guarantee their monitoring and management amid current climate and anthropogenic changes are needed. A new geospatial method with an integrated and temporal approach was developed through a multicriteria approximation, taking into account expert opinion, remote sensing-GIS, and fieldwork to map groundwater-dependent ecosystem zones (GDEZ). A survey of experts (N = 26) was conducted to assign degrees of importance to the various geospatial parameters, and the mapping was carried out using 14 parameters. The reclassified parameters were normalized on a scale of 1 to 5 according to the degree of probability of the presence of GDE. The validation was carried out through fieldwork and statistical analysis. Then, the spatio-temporal changes amid changing GW levels were assessed using the summer season normalized difference vegetation index (NDVI). Two GDEZ maps were obtained, for 2002 and 2017, between which the high- and very-high-probability zones of GDEs decreased by 31,887 ha (~ 38%). The most sensitive temporal parameters that most influenced the spatio-temporal changes on GDEs were precipitation and land use, with rain exerting a slightly the greatest influence. It was also demonstrated that identified ecosystems decreased in area or were affected
dc.description.versionVersión publicada
dc.format.extent14 p.
dc.identifier.citationA new method to map groundwater-dependent ecosystem zones in semi-arid environments: A case study in Chile. Science of the Total Environment 816 (2022) 151528
dc.identifier.doihttps://doi.org/10.1016/j.scitotenv.2021.151528
dc.identifier.urihttps://repositorio.udd.cl/handle/11447/7711
dc.language.isoen
dc.subjectExpert opinion
dc.subjectGIS
dc.subjectGroundwater-dependent ecosystems
dc.subjectMulti-criteria analysis
dc.subjectNDVI
dc.subjectRemote sensing
dc.titleA new method to map groundwater-dependent ecosystem zones in semi-arid environments: A case study in Chile
dc.typeArticle
dcterms.accessRightsPrivado
dcterms.sourceScience of the Total Environment
dspace.entity.typePublication

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