World Library  
Flag as Inappropriate
Email this Article

Jáchal River

Article Id: WHEBN0006119491
Reproduction Date:

Title: Jáchal River  
Author: World Heritage Encyclopedia
Language: English
Subject: WikiProject Argentina/Geography, Quebrada de Ullúm Dam, San Juan River (Argentina), Huarpe people, San José de Jáchal
Publisher: World Heritage Encyclopedia

Jáchal River

Canyon along the Jáchal River

The Jáchal River is a river in the province of San Juan, Argentina. It is part of the Desaguadero River basin, and one of the most important permanent watercourses in the province, with an average flow of 9 cubic metres per second (320 cu ft/s). It is born from the confluence of the Río de la Palca and the Blanco River, in the northwest of San Juan.

From its origin, the Jáchal flows south for 75 kilometres (47 mi), up to a ravine in the pre-Andean range, in a place called Cuesta del Viento. There, it turns eastward towards the city of San José de Jáchal, flowing for 40 kilometres (25 mi) along a steep gorge. Upon reaching Jáchal, the river turns south again for 40 kilometres (25 mi), and then northeast-southeast, passing by the towns of Tucunuco and Mogna. It then flows 100 kilometres (62 mi) and empties into the upper Desaguadero River (here known as Bermejo).

The Jáchal River is fed primarily by snow thaw, rainfall being only a minor contribution in this semi-arid region. Its drainage basin covers an area of 34,232 square kilometres (13,217 sq mi), or around 23,000 square kilometres (8,900 sq mi) if considered up to Cuesta del Viento.

The river is dammed in two points:

  • The Cuesta del Viento Dam, 40 kilometres (25 mi) from Jáchal, has a maximum volume of 136 million cubic metres (110,000 acre·ft). It is used to regulate and direct the flow for irrigation, and long-delayed works are in progress to finish a hydroelectric power station.
  • The Salto de la Loma hydroelectric plant, 4 kilometres (2.5 mi) northwest of Jáchal, employs a 40-metre (130 ft) high fall and has an installed power of about 1,200 kW.

Environmental issues

The Jáchal is the most important natural source of water for domestic, agricultural and industrial use in its valley, but the quality of its waters is not considered good in normal conditions, due to a high mineralization, especially salts and boron content. The latter has been found in concentrations of 2.8 parts per million (0.7 ppm are considered the upper limit for sensitive crops such as the grapevine).

In the early 2000s, Barrick Gold Corporation, a Canadian enterprise, started a gold extraction project in the San Juan Andean ranges. Residents of San Juan protested against the project, claiming that the cyanide process will pollute the upper courses of the Jáchal and San Juan rivers. In an interview in February 2006, the governor of San Juan, José Luis Gioja, denied the possibility of such damage.


External links

  • Secretaría de Minería de la Nación. Provincia de San Juan - Recursos hídricos.
  • INTA. Conferencia Internacional sobre Boro en la EEA San Juan.
  • La Nación. 26 February 2006. Gioja: "Es imposible que se pueda contaminar".
  • Fundación para la defensa del ambiente (FUNAM). Chile: crudo e inédito debate parlamentario sobre minera Barrick y proyecto Pascua Lama.
  • CuyoNoticias. Manifestación en contra empresa minera internacional.

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.