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Posts tagged Blue Nile

Blue and White Nile Rivers Meeting Near Khartoum, Sudan – November 5th, 2011

November 5th, 2011 Category: Image of the day, Rivers

Sudan - November 4th, 2011

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

The Nile has two major tributaries, the White Nile and Blue Nile. The White Nile rises in the Great Lakes region of central Africa, with the most distant source still undetermined but located in either Rwanda or Burundi. It flows north through Tanzania, Lake Victoria, Uganda and South Sudan. The Blue Nile starts at Lake Tana in Ethiopia and flows into Sudan from the southeast.

The two rivers meet near the Sudanese capital of Khartoum. Their confluence can be observed northeast of the image center. Below the point where they converge is the Gezira Scheme, an extensive area of irrigated agriculture.

Sediments in Lake Tana, Ethiopia

12.1N 37.3E

July 11th, 2011 Category: Lakes

Ethiopia - July 4th, 2011

Tan sediments line the shores of Lake Tana, the source of the Blue Nile and the largest lake in Ethiopia, while the central part of the lake appears greenish in color.

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.

Gezira Scheme Between While and Blue Nile Rivers

15.5N 32.5E

May 22nd, 2011 Category: Rivers

Sudan - May 2nd, 2011

True to its name, the White Nile River (left) does have a lighter color than the Blue Nile (right). The two rivers converge near Khartoum, at the top of the full image.

Between the two rivers is the Gezira Scheme, one of the largest irrigation projects in the world. It is centered on the Sudanese state of Al Jazirah.

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. The soil has a high clay content which keeps down losses from seepage.

Fields of the Gezira Scheme in Al Jazirah, Sudan

15.5N 32.5E

March 10th, 2011 Category: Rivers

Sudan - February 10th, 2011

The thumbnail image focuses on the Gezira Scheme, an irrigated agricultural project between the Blue and While Nile Rivers. In the full image, a larger section of the rivers’ courses can be observed as well.

The Gezira Scheme is one of the largest irrigation projects in the world. It is centered on the Sudanese state of Al Jazirah, just southeast of the confluence of the Blue and White Nile. 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.

Nile River Passing by Gezira Scheme in Sudan

15.5N 32.5E

October 24th, 2010 Category: Rivers

Sudan - October 13th, 2010

The curved greenish line that crosses this image is a portion of the Nile River in Sudan. While much of the thumbnail image is tan and arid, upon opening the full image, much greener and more fertile lands can be observed to the south.

Much of this green terrain is part of the Gezira Scheme, a large agricultural zone that uses the waters of the Nile for irrigation. The scheme, in the bottom half of the thumbnail, is located below the confluence of the Blue Nile (right) and White Nile (left) Rivers. One of the largest irrigation projects in the world, it provides water to an agricultural area of around 8,800 km².

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