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Posts tagged Gezira Scheme

White Nile River Flowing Past the Gezira Scheme, Sudan – April 19th, 2010

14.5N 33.1E

April 19th, 2010 Category: Image of the day, Rivers

Sudan - March 5th, 2010

Sudan - March 5th, 2010

Sun glint causes the White Nile River to appear truly white as it flows past the fields of the Gezira Scheme in Sudan. The Blue Nile borders this agricultural area to the east. The two rivers converge at Khartoum, near the top of the image.

The Gezira Scheme is one of the largest irrigation projects in the world, now covering about now covers 3,400 miles² (8,800 km²) in the Sudanese state of Al Jazirah. It is composed of thousands of kilometers of canals that distribute water from the Blue Nile to farms between the two rivers.

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. The main crop grown in this region is still cotton.

Nile River, from Lake Nasser to Khartoum – February 11th, 2010

19.5N 32.9E

February 11th, 2010 Category: Image of the day, Rivers

Sudan - January 26th, 2010

Sudan - January 26th, 2010

The Nile River, generally regarded as the longest river in the world, can be seen making its way through Egypt (above) and Sudan (below) in this image of northern Africa. Here, the stretch of the river from Lake Nasser (above) to the confluence of its two major tributaries, the White Nile and Blue Nile, near Khartoum (below).

Upon opening the full image, two other segments of the great river can be observed. The first is a part of the river north of Lake Nasser, surrounded by fertile green land. The second is south of Khartoum, and includes the agricultural land of the Gezira Scheme.

Roseires Reservoir on the Blue Nile in Sudan

11.7N 34.3E

January 15th, 2010 Category: Lakes, Rivers

Sudan - December 16th, 2009

Sudan - December 16th, 2009

The Roseires Dam was built in 1966 on the Blue Nile River in Sudan, creating the Roseires Reservoir visible here towards the bottom. The dam has a nominal volume of 36.3 km3. Much of the water impounded at Roseires is used to expand and intensify agriculture on the Gezira Scheme.

Raising the crest of Roseires Dam is still on the agenda, especially because low flows on the Blue Nile have cut cropping intensities on the Gezira about 15%. Instead of 1,500,000 irrigated acres, the total irrigated area is closer to 1.2 million, while the cotton crop covers 385,000, not 500,000. As the storage capacity at Roseires declines, these figures may be expected to fall further.

The Gezira Scheme and Sennar Dam, Sudan – January 5th, 2010

14.5N 33.1E

January 5th, 2010 Category: Image of the day, Lakes, Rivers

Sudan - December 16th, 2009

Sudan - December 16th, 2009

Despite its greenish appearance, the river flowing northward across the left side of this image is the White Nile. Flowing diagonally across the right side is the Blue Nile.

The expansive, green agricultural area between the two rivers are the fields of the Gezira Scheme in Sudan’s Al Jazirah state. The scheme uses an extensive series of canals and ditches to distribute water to farms in the area.

Upon opening the full image and following the Blue Nile southward, the reservoir created by the Sennar Dam can be observed. The dam, located near the town of Sennar, was built in 1925 to provide water for crop irrigation in the Al Jazirah region. It is 3025 meters (9925 feet) long, with a maximum height of 40 meters (130 feet).

Green Fields of the Gezira Scheme in Sudan – November 27th, 2009

14.5N 33.1E

November 27th, 2009 Category: Image of the day, Rivers

Sudan - October 7th, 2009

Sudan - October 7th, 2009

The green irrigated fields of the Gezira Scheme in Sudan’s Al Jazirah state fill the land between the Blue (right) and White Nile (left) Rivers. The Gezira Scheme, begun by the British in 1925 to foster cotton farming, distributes water from the Blue Nile through canals and ditches to tenant farms lying between the two rivers.

Since the start of the scheme, Al Jazirah has become Sudan’s major agricultural region, with more than 2.5 million acres (10,000 km²) under cultivation. The initial development project was semi-private, but the government nationalized it in 1950. Cotton production increased in the 1970s but by the 1990s increased wheat production has supplanted a third of the land formerly seeded with cotton.