Salt lake

Bonneville Salt Flats during the winter has about 1 inch of water on it

Bonneville Salt Flats during the summer

A salt lake, or saline lake, is a lake with a lot of sodium chloride and other dissolved minerals in the water. It is often defined as three grams or more of salt per litre. In some cases, salt lakes have more salt than sea water: they are called hypersaline lakes. An alkaline salt lake with a high content of carbonate is called a soda lake.

Salt lakes can be put into categories based on salinity:^[1]

subsaline 0.5–3 ‰ (parts per thousand)
hyposaline 3–20 ‰
mesosaline 20–50 ‰
hypersaline greater than 50 ‰

Salt lakes form when the water flowing into the lake, containing salt or minerals, cannot leave. This is because the lake is endorheic (a dead end). The water then evaporates, leaving behind any dissolved salts. This increases its salinity. Salt lakes are an excellent place for salt production. High salinity will also lead to a unique flora and fauna in the lake. Sometimes the large amount of salt means there is little life in or near the lake.

If the amount of water flowing into a lake is less than the amount evaporated, the lake will eventually disappear and leave a dry lake: a 'playa', salt flat or salt pan.

Salt Lake Media

Soltan lake in Iran with salt mounds
Astronaut's photo of Bakhtegan and Maharloo salt lakes near Shiraz, Iran. Salt lakes are particularly common in Iran.
The shore of Solt Lake Elton, Volgograd Oblast, Russia
Mono Lake, United States
Salt transport by a camel train on Lake Karum in Ethiopia.

Related pages

References

↑ Hammer U.T. (1986). Saline lake ecosystems of the world. Springer. p. 15. ISBN 90-6193-535-0.

[1] Hammer U.T. (1986). Saline lake ecosystems of the world. Springer. p. 15. ISBN 90-6193-535-0.

[1]