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Posts tagged Blue Nile

Convergence of White and Blue Nile Rivers Near Khartoum, Sudan

15.5N 32.5E

March 1st, 2012 Category: Rivers

Sudan - December 31st, 2011

The Nile is a major north-flowing river in northeastern Africa, generally regarded as the longest river in the world, at 6,650 km (4,130 miles) long. It runs through the ten countries of Sudan, South Sudan, Burundi, Rwanda, Democratic Republic of the Congo, Tanzania, Kenya, Ethiopia, Uganda and Egypt.

This image focuses on the part of the Nile in Sudan. It enters the country below Renk as the White Nile, and flows north to Khartoum, where it meets the Blue Nile. The area between the two rivers, visible in the lower right quadrant, is a large tract of irrigated land known as the Gezira Scheme. The course of the Nile in Sudan is distinctive. It flows over six groups of cataracts, from the first at Aswan to the sixth at Sabaloka (just north of Khartoum) and then turns to flow southward before again returning to flow north. This is called the Great Bend of the Nile. In the north of Sudan the river enters Lake Nasser (known in Sudan as Lake Nubia), the larger part of which is in Egypt.

Bright Green Waters of Lake Tana in Ethiopian Highlands – January 18th, 2012

12.1N 37.3E

January 18th, 2012 Category: Image of the day, Lakes, Mountains

Ethiopia - December 29th, 2011

The bright green lake in the center of this image is Lake Tana, the source of the Blue Nile and is the largest lake in Ethiopia. Located in Amhara Region in the north-western Ethiopian highlands the lake is approximately 84 kilometers long and 66 kilometers wide, with a maximum depth of 15 meters, and an elevation of 1,840 meters.

The Ethiopian Highlands are a rugged mass of mountains in Ethiopia, Eritrea (which is sometimes referred to as the Eritrean Highlands), and northern Somalia in the Horn of Africa. They can be observed more extensively upon opening the full image. The Ethiopian Highlands form the largest continuous area of its altitude in the whole continent, with little of its surface falling below 1500 m (4,921 ft), while the summits reach heights of up to 4550 m (14,928 ft).

Gezira Scheme Between White Nile and Blue Nile Rivers, Sudan

14.6N 32.8E

January 17th, 2012 Category: Rivers

Sudan - December 29th, 2011

Stretching over an area of 3,400 miles² (8,800 km²) between the While Nile (left) and Blue Nile (right) Rivers is the irrigated land of the Gezira Scheme, one of the largest irrigation projects in the world. The confluence of the two rivers at the city of Khartoum can be observed near the top edge.

The Gezira (which means “island”) is particularly suited to irrigation because the soil slopes away from the Blue Nile and water therefore naturally runs through the irrigation canals by gravity. This network of canals and ditches is 2,700 miles (4,300 km) long. Upon opening the full image, many individual fields can be observed.

Khartoum and Gezira Scheme by Nile River in Sudan – January 9th, 2012

15.5N 32.5E

January 9th, 2012 Category: Image of the day, Rivers

Sudan - January 9th, 2012

Situated near the top edge of this orthorectified wide-swath ASAR image is Khartoum, the capital and largest city of Sudan and of Khartoum State. It is located at the confluence of the White Nile flowing north from Lake Victoria, and the Blue Nile flowing west from Ethiopia. The location where the two Niles meet is known as “al-Mogran”.

Visible just southeast of the confluence of the Blue and White Nile Rivers at Khartoum is the Gezira Scheme, one of the largest irrigation projects in the world. It distributes water from the Blue Nile through canals and ditches to tenant farms lying between the the two rivers. The Gezira is particularly suited to irrigation because the soil slopes away from the Blue Nile and water therefore naturally runs through the irrigation canals by gravity.

Green Waters of Lake Tana, Ethiopia

12.1N 37.3E

January 4th, 2012 Category: Lakes

Ethiopia - December 25th, 2011

Lake Tana is the source of the Blue Nile and is the largest lake in Ethiopia. Located in Amhara Region in the north-western Ethiopian highlands, the lake is approximately 84 kilometers long and 66 kilometers wide, with a maximum depth of 15 meters, and an elevation of 1,840 meters.

Lake Tana is fed by the Lesser Abay, Reb and Gumara Rivers and its surface area ranges from 3,000 to 3,500 km² depending on season and rainfall. The lake level has been regulated since the construction of the control weir where the lake discharges into the Blue Nile, which regulates the flow to the Tis Abbai falls and hydro-power station. Here, sediments and algal growth give the lake a mint green color.

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