Río Bío Bío
|Río Bío Bío
Rio Bio Bio
|Río Bío Bío
Icalma -See and Galletue -See
|at San Pedro de la Paz in the Gulf of Arauco ( Pacific )
|899 m³ / s
|Río de La Laja
|Reservoirs flowed through
|Ralco , Pangue
|San Pedro de la Paz
Middle reaches in the Andes
For the first few kilometers, where it also receives the water of the Río Rucanuco, the outflow of Lake Icalma , the Río Bío Bío flows east to the main ridge of the Andes. Soon the course of the river changes to the north. In the middle reaches the course changes more to the northwest of the confluence with the Pacific .
Larger cities on the Río Bío Bío from the mouth to the source:
In 1647 the Spaniards and the Mapuche signed a peace treaty with the Río Bío Bío as the border. However, this was repeatedly undermined by the Spaniards, so that the Arauco War flared up again as early as 1655 .
Economy and environment
Since the late 1970s, the Chilean-Spanish energy company ENDESA planned to build 6 large dams on the Bío Bío. In 1997 the first dam at Pangue was completed. The reservoirs flood large areas of the Pehuenche and destroy their fishing grounds. The entire environment on the lower reaches of the Bío Bío was greatly changed by the dams. On September 16, 2003, the Pehuenche signed a contract with the Chilean government that compensated them for the land losses. The second dam at Ralco was dammed in 2004.
Dams and reservoirs
Looking downstream, the Bío Bío is dammed by the following hydropower plants:
|Max. Power (MW)
|Volume (million m³)
At the mouth, around 22 kilometers of the river belong to the town of San Pedro de la Paz. The lakes Laguna Grande San Pedro and Laguna Chica San Pedro offer wonderful natural landscapes for hiking. The river is also popular for kayaking and rafting .
The Valle del Bio-Bio and Valle Itata form the southernmost wine-growing regions of Chile .
The estuary is in the Lago Galletué nature reserve . The area of Alto Biobío on the middle reaches is easily developed for tourism.