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- Title
VARIABILIDADE DO REGIME HIDROLÓGICO DA BACIA AMAZÔNICA.
- Authors
de Castro Coutinho, Eliane; Paulino da Rocha, Edson José; Meiguins Lima, Aline Maria; Campos Ribeiro, Hebe Morganne
- Abstract
The Amazon Basin is affected by episodes of droughts and floods, such as El Niño (EN), La Niña (LN), Intertropical Convergence Zone (ZCIT) and South Atlantic Convergence Zone (SACZ), causing serious changes in river flows. Thus, the objective of this study is to analyze how the water resources in our basin contribute to the flow of the main river of the Amazon basin, as well as its behavior in the face of climatic, temporal and spatial adversities, from 1982 to 2012, to From 16 fluviometric stations along the main channel of the Basin, this flow depends on the variations of its tributaries, in the right margin and the left margin, and it was verified that the tendency of increase of the average flow in the channel coincided with the tributaries of the left margin, That is, in the Rio Negro, Trombetas and Jari basins. As for the magnitude of the flow, this depends on the tributaries of the right bank, the Purus river basin, Madeira, Tapajós and Xingu. The seasonality of the Amazon basin shows 65% of the total flow in the flood season and 35% in the drought and the stations along the channel have an increasing tendency in the amplitude of the average annual flow, as it approaches the entrance. The trend of average flow in the channel coincided with the tributaries of the left margin, the Rio Negro, Rio Trombetas and Rio Jari basins, and the magnitude of the flow depends on the tributaries of the right margin, the Purus River, the Madeira River, the Rio Tapajós and the Xingu River, with respect to the flow range the influence is caused by both the left and right river tributaries, except for the Purus River basin.
- Subjects
INTERTROPICAL convergence zone; STREAMFLOW; WATERSHEDS; CHANNEL flow; LA Nina
- Publication
Boletim de Geografia, 2019, Vol 37, Issue 2, p129
- ISSN
0102-5198
- Publication type
Article
- DOI
10.4025/bolgeogr.v37i2.38424