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Great Ruaha River

From Wikipedia, the free encyclopedia

Great Ruaha River
Dry Great Ruaha River and.jpg
The Great Ruaha River dry bed (2006)
Location
CountryTanzania
Physical characteristics
SourceLukosi River
 • locationTanzania
2nd sourceYovi River
 • locationTanzania
3rd sourceKitete River
 • locationTanzania
4th sourceSanje River
 • locationTanzania
5th sourceLittle Ruaha River
 • locationTanzania
MouthRufiji River
Length475 km (295 mi)
Basin size83,970 square kilometres (32,421 sq mi)

The Great Ruaha River is a river in south-central Tanzania that flows through the Usangu wetlands and the Ruaha National Park east into the Rufiji River. Its basin catchment area is 83,970 square kilometres (32,421 sq mi).[1] The population of the basin is mainly sustained by irrigation and water-related livelihoods such as fishing and livestock keeping.

Size

Great Ruaha is about 475 kilometres (295 mi) long, its tributary basin has a catchment area of 68,000 square kilometres (26,000 sq mi) and the mean annual discharge is 140 cubic metres (4,900 cu ft) per second. The Great Ruaha River supplies 22 percent of the total flow of the Rufiji catchment system. Thirty-eight species of fish have been identified in the Great Ruaha River.

The river's headwaters are in the Kipengere Range. From there the Great Ruaha River descends to the Usangu plains, an important region for irrigated agriculture and livestock in Tanzania. The river eventually reaches the Mtera Dam and then flows south to the Kidatu Dam. These two generate about 50 percent of Tanzania's electricity. The river continues southwards and flows across the Selous Game Reserve before reaching the Rufiji River. The major rivers contributing to the Great Ruaha River are Lukosi, Yovi, Kitete, Sanje, Little Ruaha, Kisigo, Mbarali, Kimani, and Chimala whereas the small ones include Umrobo, Mkoji, Lunwa, Mlomboji, Ipatagwa, Mambi, and Mswiswi rivers.

Issues

Decreased flows in the Great Ruaha have been recorded since the early 1990s, resulting in complete drying of sections of the river in 1993 and in dry years since (illustration above). This has been attributed to uncontrolled and poor water management, with the large rice irrigation schemes playing a major role.

Panorama of Ruaha National Park, with a view on the Great Ruaha River on 27 July 2003.
Panorama of Ruaha National Park, with a view on the Great Ruaha River on 27 July 2003.

References

  1. ^ Arvidson, Anders; et al. (May 2009). "Initial Assessment of Socioeconomic and Environmental Risks and Opportunities of Large‐scale Biofuels Production in the Rufiji District" (PDF). SEKAB BioEnergy (T) Ltd. p. 23. Archived from the original (PDF) on 2012-09-10. Retrieved 2012-09-10.

Sources

This page was last edited on 13 August 2020, at 01:11
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