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dc.contributor.author
Guerra, Juan Carlos
dc.contributor.author
Nosetto, Marcelo Daniel
dc.date.available
2024-11-04T09:31:14Z
dc.date.issued
2024-05-16
dc.identifier.citation
Guerra, Juan Carlos; Nosetto, Marcelo Daniel; Hydrological changes in a plain basin in central Argentina following expansion of rainfed agriculture and climate change; John Wiley & Sons; Ecohydrology; 17; 6; 16-5-2024; 1-13
dc.identifier.issn
1936-0584
dc.identifier.uri
http://hdl.handle.net/11336/247114
dc.description.abstract
The characterization of long-term streamflow in regions undergoing climatic change and agricultural expansion is relevant for achieving sustainable development goals and for assessing the vulnerability of water-dependent populations and agricultural activities. The objective of this work was to characterize the temporal patterns of water yield in the plain basin of the Carcarañá River (33,063 km2), located in central Argentina and to analyse its relationship with a fast expansion of rainfed cultivation and climate change. The streamflow data for the period 1980–2020 were analysed in conjunction with climatic data (rainfall, reference evapotranspiration), satellite data (NDVI) and cropping statistics (sown area of summer crops) data. The annual water yield averaged ~10% of the rainfall and showed a clear upward trend throughout the study period, both in absolute terms and relative to rainfall (i.e., runoff coefficient), which was not explained by rainfall or reference evapotranspiration temporal patterns. Conversely, we found that the trend in water yield was positively associated with the agricultural area (p < 0.05), which more than doubled during the study period (from 29% to 66%). Likewise, the mean NDVI of the basin, a proxy for primary productivity and vegetation transpiration, has decreased steadily over the last 20 years (p < 0.05). The separation between base flow and quick flow suggested that both flows increased during the analysed period (p < 0.05), though the latter would have been more relevant in explaining the trend observed in total flow. Taken together, our results suggest that agricultural expansion, rather than climate change, is the dominant factor explaining the hydrological changes observed in the study basin. Understanding the key role of land use in shaping the hydrology of a landscape is critical to developing policies and practices for more efficient and sustainable use of environmental resources.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
John Wiley & Sons
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
NDVI
dc.subject
PAMPAS
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SOYBEAN
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STREAMFLOW
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WATER YIELD
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Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Hydrological changes in a plain basin in central Argentina following expansion of rainfed agriculture and climate change
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-10-29T10:51:54Z
dc.journal.volume
17
dc.journal.number
6
dc.journal.pagination
1-13
dc.journal.pais
Estados Unidos
dc.journal.ciudad
New York
dc.description.fil
Fil: Guerra, Juan Carlos. Universidade Federal de Sao Paulo.; Brasil
dc.description.fil
Fil: Nosetto, Marcelo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi". Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis "Prof. Ezio Marchi"; Argentina
dc.journal.title
Ecohydrology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1002/eco.2679
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/eco.2679
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