Influence of El Niño Southern Oscillation – ENSO – (2015/2016) in the hydrological variability and in the power generation in Curua-Una hydroelectric power plant, central Amazon
DOI:
https://doi.org/10.6008/CBPC2179-6858.2020.004.0012Keywords:
Rain-flow, Extreme events, Santarém/PAAbstract
The aim of this study was to analyze the influence of the El Niño Southern Oscillation (ENSO) event, which happened from 2015 to 2016, on the variability of extreme rainfall-flow events, level and power generation observed in the Curuá-Una power plant reservoir. The electric power generation data were used to evaluate the effect of extreme rainfall-flow events. The effects of the ENSO (2015/2016) were: the reduction of around 50% in the rainfall in the rainy season and in the less rainy season, with no precipitation in October and November; the decay of the reservoir level upstream, reaching 60 m; the reduction (around 150 m³/s) in the average flow in the rainy season, influenced by very strong El Niño, as occurred in 2016 and the decay of the average energy generation from 25MW/h to 10 MW/h. The results show that the hydrological regime of the Curuá-Una reservoir was strongly affected by the ENOS activity, with a consequent reduction in the electric power generation.
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