Laguna de Aculeo

Laguna de Aculeo is since 2018 a dried-out lake located in the city of Paine, Maipo Province, Santiago Metropolitan Region, Chile. It featured muddy banks and is surrounded by gently tilting ground. The lake's bottom is largely impermeable limiting its connection to underground aquifers.[1] It classifies as a sediment-dammed lake.[1]

Laguna de Aculeo
Windsurfers on a lake, with hills beyond
Laguna de Aculeo (January 2009)
Laguna de Aculeo is located in Chile
Laguna de Aculeo
Laguna de Aculeo
Location in Chile
LocationMaipo Province, Santiago Metropolitan Region
Coordinates33°50′47″S 70°54′55″W
TypeLagoon
Basin countriesChile
Surface area12 km2 (4.6 sq mi) (2011) 0 km2 (0 sq mi) (2018)
Average depth6 m (20 ft) (2011) 0 m (0 ft) (2018)
SettlementsPaine

The drying of lake is the result of below-average rainfall over the past decade and also because of human activity which are diverting rivers and pumping groundwater from aquifers, which both had replenished the lake.[2][3]

History

The lake obtained its name from the Mapuche term Acum-Leu, meaning "where the river ends".[3][4][5] Local folklore tells of a treasure, an entierro, that is hidden in the mud of the bottom of the lake since 1814.[6]

Once a main tourist destination for individuals in Santiago, the lake featured a popular floating bar in the 1990s.[3]

According to García-Chevesich, who co-authored a research paper about the lake, stated that the population growth, the purchase of water rights and drought resulted with the drying of the lake.[3] In 2010, plantations and large estates purchased the water rights–water is recognized as private property in Chile following the Augusto Pinochet dictatorship–of tributaries feeding the lake and rerouted them for their own usage.[3] The average annual rainfall in the region dropped from 350 mm/y in the 1980s to less than half that in the 2010s. In 2011 the lagoon was 12 km2 in size and 6 metres in depth.[7] It disappeared entirely on May 9, 2018. Probable causes include a large influx of tourists, as well as using its waters for avocado cultivation,[7] as well as increased water use by the nearby city of Paine and a longterm drought period since 2010, which is partially due to global warming.[8]

Reclamation

Reclamation projects are promoted to identify solutions for long-term recovery, especially voluntary watershed management agreements that will allow the rational and sustainable use of this resource. Since the lake derives much of its inflow from surface streams the need to keep or grow healthy forest cover in its watershed to act as a humidity storage has been deemed important for the lake's recovery.[1] An eventual recovery of a permanent water surface would require various years of precipitation surplus.[1]

See also

References
  1. Montes, Carlos (2022-07-22). "¿El fin de la laguna de Aculeo? Últimas lluvias tienen cero impacto en su caudal". Qué Pasa. La Tercera. Retrieved 2023-01-07.
  2. Welle (www.dw.com), Deutsche. "The mystery of a disappearing lake and the struggle over water rights in Chile | DW | 08.03.2022". DW.COM. Retrieved 2022-03-29.
  3. "'Consequences will be dire': Chile's water crisis is reaching breaking point". The Guardian. 2022-06-01. Retrieved 2022-06-08.
  4. Pérez-Carmona, Daniel (1993). Diccionario mapuche. Antiyal.
  5. "Diccionario Mapuche-Castellano". Archived from the original on 2014-06-30. Retrieved 2019-02-16.
  6. Plath, Oreste (1979). Folklore chileno (in Spanish). Santiago, Chile: Editorial Nascimiento. p. 129.
  7. Populär sjö borta i Chile – bara öken kvar. Aftonbladet, 23 March 2019 (Swedish)
  8. Satellitenbild der Woche - Verdammt, hier war doch mal ein See!. Spiegel Online, 22 April 2019 (German)


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