Reservoirs should end the rainy season with a good level, but the current volume of rain worries ONS

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This week, the government decided to adopt measures to preserve energy generation through hydroelectric plants, given the low water flow during the rainy season. The National Electric System Operator (ONS) reported this Friday (8) that the reservoirs of hydroelectric plants should end the month of March with levels above 60%. The level is considered good by the ONS. But the agency is concerned about the current volume of rain which, as it is not ideal, has led the ONS to take measures to save water in the reservoirs. The period considered rainy will still last about a month. Until then, if it doesn’t rain enough, hydroelectric plants may have difficulty in the dry season. According to the ONS, this rainy period has been unsatisfactory in the Southeast and Central-West regions. In February, reservoirs had levels 12.4% lower than in the same period in 2023. See the projection for reservoirs in each region until the end of March: North: 96% Northeast: 71.7% Southeast/Central-West : 65.8% South: 64.3% According to the ONS, the current reservoir levels are “the result of the good management of water resources that has been carried out” by the operator. With less rain and record consumption, the government takes measures to prevent electricity bills from rising Rains Water flow remains at levels below the historical average for the rainy season. According to the ONS, only the South has the prospect of a high water entry into reservoirs in the coming weeks, 115%. Water flow is an important indicator for the electrical system because it is related to the power generation capacity of these plants. Hydroelectric plants account for around 47% of national energy generation capacity. Measures This week, the Electricity Sector Monitoring Committee (CMSE) decided to adopt measures to preserve energy generation by hydroelectric plants. The CMSE authorized the reduction of water output at the Jupiá and Porto Primavera hydroelectric plants, on the Paraná River, between the states of São Paulo and Mato Grosso do Sul. The monitoring group also authorized the retention of water in the so-called “headwater plants ” — located at the headwaters of rivers. According to the ministry, this measure could preserve around 11% of storage in the Paraná basin until August this year and around 7% in the Southeast and Central-West. The decisions were taken due to the level of the reservoirs during the rainy season, which raised an alert in the government.

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