Precipitation Analysis and the Influence of the El Niño Phenomenon on the Transboundary Basin of the Madeira River

Claudia Daza Andrade, José Paulo Soares Azevedo, Marcos Aurélio V. Freitas and Leandro Andrei Beser Deus ()
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Claudia Daza Andrade: Federal University of Rio de Janeiro (COPPE/UFRJ)
José Paulo Soares Azevedo: Federal University of Rio de Janeiro (COPPE/UFRJ)
Marcos Aurélio V. Freitas: Federal University of Rio de Janeiro (COPPE/UFRJ)
Leandro Andrei Beser Deus: Federal University of Rio de Janeiro (COPPE/UFRJ)

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 2016, vol. 30, issue 9, No 12, 3077-3092

Abstract: Abstract The current paper aims at analyzing the behavior of monthly precipitation in the Brazilian and Bolivian parts of the basin of the Madeira river, one of the most important sub-basins of the Amazon basin. Both parts account for 93 % of its total, and studies on this topic are lacking. The research was based on data from 41 rainfall stations considering a historic series from 1978 to 1998, which encompasses two of the largest El Niño events (1982–1983 and 1997–1998), hence its influence on the precipitation of the region was assessed as well. To study precipitation behavior, rainfall was regionalized using data clustering methods (Ward and K-means), with the basin being divided into five regions of homogeneous rainfall. Both methods were applied to the regions and showed similar results, providing a higher reliability for the clusters obtained. The results of the analysis show the homogeneous regions of the basin, the spatial variability of precipitation, seasonality and the influence of the phenomenon on the region.

Keywords: Madeira river basin; Transboundary basin; Precipitation analysis; El Niño phenomenon in the Amazon (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1007/s11269-016-1332-8

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