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Abstract:

A regression approach was used to quantitatively estimate the attribution of the notable growth in the river flows of the Plata Basin during 1960-1999. The study was conducted in seven large basins that account for most of the Plata River discharge. Annual rainfall integrated over each basin and annual river flows at their closing points were used for the analysis. The contribution of rainfall changes during each of the three phases of El Niño-Southern Oscillation to total rainfall change in these basins was also calculated. The two main drivers for the generalized growth of the river flows were the increased precipitation and the decreased evaporation attributable to land use change, including deforestation of natural forest and crop switch from sugarcane and coffee trees to soybean. Other evaporation changes played a minor role. There was a north-south gradient in the respective importance of each driver, with land use change having greater weight in the northern basins and the precipitation increase in the southern ones. Thus, in the northern part of the Upper Paraná Basdespite the negative trend in precipitation there was a strong augment of the river flow caused by land use change. The contribution to the positive trend of the stream flows in the middle of the Plata Basin came from both land use change and increased precipitation. Finally, in the south, the Uruguay River flow change was basically due to the precipitation trend that was not only observed during the El Niño phase, but also during the Neutral phase. Only in the Middle Paraguay Basin was the shift to more frequent and intense El Niño events that took place in the 1970s an important factor in the contribution of precipitation to streamflow trends. © 2010 Royal Meteorological Society.

Registro:

Documento: Artículo
Título:Attribution of the river flow growth in the Plata Basin
Autor:Doyle, M.E.; Barros, V.R.
Filiación:Centro de Investigaciones del Mar y la Atmósfera (CIMA/CONICET-UBA), Buenos Aires, Argentina
Departamento de Ciencias de la Atmósfera y los Océanos, FCEN, Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:Land use change; Plata Basin; Precipitation; River flow; Trends; Annual rainfall; Land-use change; Natural forests; Northern basins; Paraguay; Plata Basin; Precipitation trends; River discharge; River flow; Three phasis; Total rainfall; Trends; Uruguay; Atmospheric pressure; Deforestation; Evaporation; Nickel compounds; Phase transitions; Precipitation (chemical); Rain; Rivers; Stream flow; Land use; El Nino-Southern Oscillation; evaporation; land use change; precipitation (climatology); river discharge; river flow; streamflow; Deforestation; Evaporation; Land Use; Nickel Compounds; Precipitation; Rain; Rivers; Stream Flow; Brazil; Paraguay Basin; Parana; Rio de la Plata; Glycine max
Año:2011
Volumen:31
Número:15
Página de inicio:2234
Página de fin:2248
DOI: http://dx.doi.org/10.1002/joc.2228
Título revista:International Journal of Climatology
Título revista abreviado:Int. J. Climatol.
ISSN:08998418
CODEN:IJCLE
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_08998418_v31_n15_p2234_Doyle.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v31_n15_p2234_Doyle

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Citas:

---------- APA ----------
Doyle, M.E. & Barros, V.R. (2011) . Attribution of the river flow growth in the Plata Basin. International Journal of Climatology, 31(15), 2234-2248.
http://dx.doi.org/10.1002/joc.2228
---------- CHICAGO ----------
Doyle, M.E., Barros, V.R. "Attribution of the river flow growth in the Plata Basin" . International Journal of Climatology 31, no. 15 (2011) : 2234-2248.
http://dx.doi.org/10.1002/joc.2228
---------- MLA ----------
Doyle, M.E., Barros, V.R. "Attribution of the river flow growth in the Plata Basin" . International Journal of Climatology, vol. 31, no. 15, 2011, pp. 2234-2248.
http://dx.doi.org/10.1002/joc.2228
---------- VANCOUVER ----------
Doyle, M.E., Barros, V.R. Attribution of the river flow growth in the Plata Basin. Int. J. Climatol. 2011;31(15):2234-2248.
http://dx.doi.org/10.1002/joc.2228