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| Xingó Hydroelectric Complex | |
|---|---|
| Name | Xingó Hydroelectric Complex |
| Location | Piranhas-Açu River, Brazil (border of Alagoas and Sergipe) |
| Status | Operational |
| Construction began | 1987 |
| Opened | 1994 |
| Owner | Eletrobras / CHESF |
| Dam type | Roller-compacted concrete and embankment |
| Length | 2,196 m |
| Height | 140 m |
| Reservoir capacity | 3.2 km³ |
| Plant capacity | 3,162 MW (approx) |
| Turbines | 6 x 528 MW Francis units |
Xingó Hydroelectric Complex The Xingó Hydroelectric Complex is a major hydroelectric installation on the Piranhas-Açu River straddling the border between Alagoas and Sergipe in Brazil. Commissioned in the 1990s, it forms a keystone in regional electricity supply and river regulation, influencing navigation, irrigation, and regional development across northeastern Brazilian states.
The complex was developed during a period of large infrastructure projects led by Eletrobras affiliates and national energy planning agencies, integrating civil engineering, hydraulic design, and electrical engineering disciplines. Its realization intersected with policy debates involving Ministry of Mines and Energy, state utilities such as CHESF and ANEEL, and international consulting firms.
Sited on the Piranhas-Açu River near the municipalities of Delmiro Gouveia and Canindé de São Francisco, the complex occupies a corridor linking the São Francisco River basin to interior Northeast waterways. The area lies within tropical semi-arid zones near the Caatinga biome and is proximate to transportation axes like the BR-316 and BR-235 highways. Surrounding municipalities impacted by the reservoir include Piranhas and Propriá, with cultural sites such as the Sertão landscapes and riparian communities.
Design combined roller-compacted concrete and conventional concrete elements, associated with an embankment spillway and gated overflow structures conceived after studies by engineering consultancies and construction firms engaged by Eletrobras subsidiaries. Construction drew on international expertise from firms experienced in projects like Itaipu Dam, Balbina Dam, and Belo Monte, adapting designs to geology similar to the Precambrian basement and locally encountered schist and granite. Major contractors coordinated with regulatory bodies including IBAMA and state secretariats.
The reservoir inundated extensive riparian zones to create a retention volume of several cubic kilometers, altering hydrology across the Piranhas-Açu corridor and forming a navigable lake used for transport and tourism. The main dam, with a structural height around 140 m and crest length over 2,000 m, houses intake towers, sluices, and a spillway designed to accommodate Probable Maximum Flood estimates derived using methodologies aligned with international practice established in projects like Three Gorges Dam and Hoover Dam studies.
The powerhouse contains multiple high-capacity Francis turbines connected to vertical shaft generators supplied by major electromechanical manufacturers analogous to suppliers on projects for Siemens, GE, and Andritz in other Latin American ventures. Installed capacity approaches several thousand megawatts, with units synchronized to the SIN grid via step-up transformers and high-voltage substations linking to transmission corridors feeding metropolitan centers and industrial nodes such as Recife, Maceió, and Aracaju.
The project produced substantial environmental modification, including habitat loss in the Caatinga and riparian forests, impacts to fish migration patterns comparable to concerns raised at Itaipu and Balbina, and changes in sediment transport affecting downstream deltaic systems near the Atlantic Ocean. Social consequences included resettlement of traditional populations, interactions with indigenous and quilombola communities, and adjustments to livelihoods in fisheries and agriculture, necessitating mitigation programs coordinated with agencies like IBAMA and social development initiatives modeled on precedents from Vale do Rio Doce resettlement policies.
Operational management follows protocols for reservoir regulation, turbine maintenance, and emergency preparedness aligned with standards promulgated by ANEEL and influenced by lessons from extreme events at other large dams. Routine inspections, vibration analysis, and sediment management are complemented by safety drills coordinated with municipal civil defense bodies and river navigation authorities. Flood control, drought management, and contingency planning integrate hydrological forecasting institutions and meteorological data sources including INMET.
Beyond electricity supply, the complex underpins regional infrastructure by stabilizing river flows for irrigation projects, supporting aquaculture and tourism economies around reservoir towns, and stimulating investments in transmission and industrial development in the Northeast corridor. It features in national energy matrices alongside thermal, solar, and wind installations, contributing to discussions by entities like clean energy advocates, investment banks, and multilateral lenders involved in energy transition funding.
Category:Dams in Brazil Category:Hydroelectric power stations in Brazil