Evaluation Rainfall Regime at the Hydroelectric Power Plant toward Climate Change

The hydroelectric plants are first in the Brazilian energy matrix, so irregularities in
the rainfall regime can affect the energy generation, thus evidencing the need to know
the rainfall distribution in the studied area. This work aimed to evaluate possible
analysis of the impacts of climate change on the rainfall regime in the Machadinho
hydroelectric region. For the research development, the IPCC-AR5 pessimistic
scenario was used, representing a scenario with a continuous population growth and
high carbon dioxide emissions. From the historical series and organized projections,
precipitation anomalies were calculated. Analyzing the difference between the
average of the month and the climatological normal, it was inferred that the model
used presented a positive trend for precipitation in the period from 2026 - 2100,
projecting anomalies between 25 and 200 mm per month. A greater amplitude is
observed in the precipitation of 2076-2100, indicating an increase in the occurrence
of extreme events of precipitation, mainly in the spring period. Considering that the
rains in the Machadinho hydroelectric region are increasing in the scenarios
analyzed, the average water level in the reservoir of the plant tends to increase.
JOURNAL OF CONTEMPORARY URBAN AFFAIRS (2017) 1(3), 62-65.
https://doi.org/10.25034/ijcua.2018.3682