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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.

Volcano and Lakes around Addis Ababa, Ethiopia

December 21st, 2008 Category: Lakes, Volcanoes

Addis Ababa and surroundings, Ethiopia - December 10th, 2008

Addis Ababa and surroundings, Ethiopia - December 10th, 2008

Close-up of Lake Ziway

Close-up of Lake Ziway

Addis Ababa (sometimes spelled Addis Abeba) is the capital city of Ethiopia and the African Union.

It is also the largest city in Ethiopia, with a population of 2,738,248 according to the 2007 population census.

Addis Ababa is a grassland biome that lies at the foot of Mount Entoto, visible at the top upon opening the full image.

From its lowest point, around Bole International Airport, at 2,326 metres (7,630 ft) above sea level in the southern periphery, the city rises to over 3,000 metres (9,800 ft) in the Entoto Mountains to the north.

Close-up of volcano and Lake K'o K'a

Close-up of volcano and Lake K'o K'a

Some interesting geographical features can also be found south of Addis Ababa. In the first close-up is  Lake Ziway (or Lake Zway), one of the freshwater Rift Valley lakes of Ethiopia, located about 60 miles south of Addis Ababa. Lake Ziway is 25 kilometers long and 20 km wide, with a surface area of 434 square kilometers. It has a maximum depth of 4 meters and is at an elevation of 1,846 meters. The white patch on the lake’s western shore is the town of Ziway.

The second close-up shows another rift valley lake, Lake K’o K’a (or Koka). This lake is artificial, created by the contruction of the Koka Dam. The small white area to its north is the town of Mojo (or Modjo).

To the East of Lake K’o K’a is Mount Zuqualla (also spelled Zuquala or Chukala), an extinct volcano with a height of 2,989 meters. It is known for its crater lake, Lake Dembel, an elliptical body of water with a maximum diameter of about one kilometer.

Close-up of the city of Addis Ababa

Close-up of the city of Addis Ababa

The city, best seen in the final close-up, possesses a complex mix of highland climate zones, with temperature differences of up to 10°C, depending on elevation and prevailing wind patterns.

The high elevation moderates temperatures year-round, and the city’s position near the equator means that temperatures are very constant from month to month.

source Wikipedia

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