San Juan River (Argentina)

Río San Juan in the gorge of Ullum

Course of the river in the province of San Juan

The river near the department Calingasta

The San Juan River is a river in the southern Argentine province of San Juan.

It is fed primarily from the melting water from the Andes. The river has an average flow of 56 m³ / s It is 500 km long and its catchment area covers an area of ​​39,906 km ². The Ullum Reservoir, which is located at an altitude of 768 m, covers an area of 32 km ² and has a volume of 440 million m³.

The headwaters of the river is used for water sports such as rafting and fishing, windsurfing and swimming at Ullum reservoir. Over its entire length the waters of the Río San Juan is mainly used for irrigation.

Inflows

  • Río Castaño
  • Río de los Patos
  • Río Saso
  • Río Uruguay
  • Río de la Cienaga
  • Arroyo Los Tapones
  • Arroyo Agua Negra
  • Dren Cochagual
  • Río del Agua
  • Río Mendoza
Argentina Calingasta Department
684619
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