itaipu ·
Itaipu spillway opened after regional rainfall
Marco Três newsroom · edited by Annie GrellmannPortuguêsEspañol
Controlled operation begins at dawn to regulate reservoir level
The spillway of the Itaipu Power Plant, located on the border between Brazil and Paraguay, was opened in a scheduled manner in the early morning of Sunday, September 13, to control the reservoir level after rainfall in the incremental basin. The operation began at 1:50 a.m. with an initial flow of 1,700 m³/s.
The opening of the left channel of the spillway was the first stage of the operation. At 2:43 a.m., the flow was increased to 3,100 m³/s. According to operators' forecasts, the volume of water spilled may reach 3,800 m³/s during the afternoon, with a reduction expected by the end of the day.
The discharge should continue until hydrological conditions return to a level that allows the spillway to be closed. Even with the operation underway, the plant continues to meet the electricity demand of Brazil and Paraguay.
Itaipu is a run-of-river power plant, characterized by a reservoir with limited storage capacity, which requires operations like this to maintain adequate levels during periods of intense rainfall.
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