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Posts tagged Salt Lake

Uvs Nuur, Mongolia’s Largest Lake – June 23rd, 2009

50.2N 92.6E

June 23rd, 2009 Category: Image of the day, Lakes, Rivers

Lake Uvs, Mongolia - June 8th, 2009

Lake Uvs, Mongolia - June 8th, 2009

Lake Uvs, or Uvs Nuur, is a highly saline lake in an endorheic basin in Mongolia with a small part in Russia – its northeastern tip, situated in Russia’s Tuva Republic. All of the lake and many parts of its surroundings have been declared protected sites.

It is the largest lake in Mongolia by surface area, covering 3,350 km² at 759 m above sea level. Uvs Nuur has a length of 84 km and a width of 79 km, with an average depth of 6 m. This shallow and very saline body of water is the remainder of a huge saline sea which covered a much larger area several thousand years ago.

Its basin is separated from the rest of the Great Lakes Depression by the Khan Khökhii ridge. However, it is not a rift lake as some mistakenly think.

The main feeding rivers are the Baruntara Gol, Nariin Gol, and Tesiin Gol from the Khangai Mountains in the east, and the Kharkhiraa River and Sangil Gol from the Altai Mountains in the west. All of these can be

The very large catchment area with no exit results in highly saline water (18.8 ppt, 5 times saltier than the oceans), primarily due to sulphate and sodium ions.

Australia’s Lake Eyre Continues to Thrive

28.2S 137.6E

June 17th, 2009 Category: Lakes, Rivers

Australia - April 13th, 2009

Australia - April 13th, 2009

Lake Eyre, bottom center, is generally an arid, desolate place in Australia’s outback for years on end, identifiable only as a large, white salt pan. However, it fills occasionally when the rivers of the Eyre Basin, which drain one sixth of the country, have a large enough flow.

Such a flow has been happening over the last few months. Here, three rivers in Queensland’s Channel Country, from left to right, Eyre Creek, Diamantina River and Cooper Creek, create green, vegetated areas amidst the arid Australian outback and fill Lake Eyre.

This last occurred in 2000, but this year’s flow, intensified by the heavy summer flooding in Queensland, is expected to be much greater and could lead to a huge bird migration and breeding event.

Pelicans have already established a breeding colony on an island in Lake Eyre, and other birds have flown in from hundreds of kilometres away, reports Australia’s ABC News.

The waters have turned desert dunes into vegetated areas, and wetlands have formed across floodplains.

Ethiopian Rift Valley Lakes

8.0N 38.8E

June 13th, 2009 Category: Lakes

Ethiopia - June 3rd, 2009

Ethiopia - June 3rd, 2009

The Ethiopian Rift Valley lakes are the northernmost of the African Rift Valley lakes. Most of these do not have an outlet, and most are alkaline.

In central Ethiopia the Great Rift Valley splits the Ethiopian highlands into northern and southern halves, and the Ethiopian Rift Valley lakes occupy the floor of the rift valley between the two highlands.

At the top is Lake Koka, with a surface area of 250 km² at an elevation of 1590 m. The large green lake below it is Lake Zway, a freshwater lake of 485 km² at an elevation of 1636 m.

The brown lake below is Lake Langano, at an elevation of 1,585 meters and with a surface area of 230 square kilometers. Though its brown color may make it appear less inviting, it is free of Bilharzia (schistosomiasis), unlike all other freshwater lakes in Ethiopia, making it popular for swimming.

To its left is Lake Abijatta, with a surface area of 205 km², at an elevation of 1573 m. Along the northeastern corner of this lake are a number of hot springs.

Continuing south, the large dark body of water is Shala Lake. It has a surface area of 409 square kilometers, a maximum depth of 250 meters and an elevation of 1,567 meters. It is known for the sulphur springs on the lake bed and is surrounded by hot springs filled with boiling water.

Finally, the southernmost lake visible here is Lake Awasa, an endorheic basin with a surface area of 129 square kilometers. Despite its lack of an outflow, it is essentially a freshwater lake, indicating that it must have a subterranean outlet.

Lake Tengiz, Kazakhstan

50.4N 68.9E

June 13th, 2009 Category: Lakes

Lake Tengiz, Kazakhstan - June 8th, 2009

Lake Tengiz, Kazakhstan - June 8th, 2009

Lake Tengiz  is a saline lake in north-central part of Kazakhstan. It has an area of 1,382 km², average depth of 2.5 m and maximum depth of 6.7 m. It is designated a Ramsar wetland site of international importance.

Lake Tengiz is an important wetland site for birds. In fact, 295 species of birds have been recorded there, 22 of which are endangered.

Here, the waters of the lake appear green, while the wetlands around the shore are tan in color. A series of smaller lakes and ponds extends northeast from Lake Tengiz’s northeastern shore. Above the lake, the land is used for agriculture.

Ephemeral Lakes in Western Australia

23.4S 122.8E

June 12th, 2009 Category: Lakes, Rivers

Western Australia - June 8th, 2009

Western Australia - June 8th, 2009

The Rudall River, appearing as a tan streak through the red landscape, is an ephemeral river in the Pilbara region of Western Australia. The entire length of the river is located within the boundaries of the Rudall River National Park, the largest national park in Australia.

The Rudall River occasionally brings water to Lake Dora, a seasonal salt lake. It lies between the vegetated sand fields of the Great Sandy and Gibson Deserts. Here, the seasonal lake appears to contain water.

South of Lake Dora is another ephemeral salt lake, called Lake Disappointment. The lake, which is saline, is home to many species of waterbirds.

Continuing south, yet another ephemeral lake, Lake Carnegie, comes into view near the bottom of the image. It fills with water only during periods of significant rainfall. In dry years, it is reduced to a muddy marsh.

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