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 . It traverses and marks the borders between Iringa Region , Dodoma Region and Morogoro Region . The Great Ruaha river has a basin catchment area of 83,970 square kilometres (32,421 sq mi). The population of the basin is mainly sustained by irrigation and water-related livelihoods such as fishing and livestock keeping.
21-556: 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
42-707: Is a plateau in Tanzania 's Kipengere Range known for its floral diversity. The plateau is in Kitulo National Park . This montane grassland area was the first area in East Africa to become a national park because of its unique flora. Botanists have referred to it as the Serengeti of Flowers . 9°05′25″S 33°55′40″E / 9.0903575°S 33.9278906°E / -9.0903575; 33.9278906 This Tanzania location article
63-487: Is generally covered in montane grassland. The grasslands are home to 350 species of plants, including numerous ground orchids, geophytes , and other afro-alpine plants. During the wet season the montane grasslands are carpeted with numerous flowers. Many species are limited to the Kipengere Range and nearby highlands, and three – Brachystelma kituloensis, Impatiens rosulata and Pterygodium ukingense – are limited
84-487: Is mostly clad in montane grasslands, renowned for their botanical diversity and displays of flowers, with montane evergreen forests mostly in stream valleys. Some sources use the names Kipengere Range or Livingstone Mountains to describe the entire range, while others distinguish the Livingstone Mountains as the southwest-facing escarpment which runs along the shore of Lake Malawi, and the Kipengere Range as
105-524: Is the main peak in the Poroto Mountains. At the foot of the mountains on Lake Malawi are the ports of Manda , near the mouth of the Ruhuhu , and Matema , at the north-east corner of the lake. The Nyakyusa , Kisi , and Manda people live along the shore of Lake Malawi along the southwestern escarpment of the range. The Wanji , Magoma , Kinga , Pangwa , Ngoni and Nena people live in
126-786: The Kipengere Range In west Njombe Region . 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
147-812: The Livingstone Mountains , lies entirely in Njombe Region in southwest Tanzania at the northern end of Lake Nyasa . Near Lake Nyasa they are known as the Kinga Mountains . It is a plateau-like ridge of mountains running southeastwards from the basin of the Great Ruaha River in the north to that of the Ruhuhu River in the south, and forms part of the eastern escarpment of the East African Rift . The range
168-399: The 350.78 km Kipengere Range Forest Reserve, established in 1958. The proposed Ndukunduku forest reserve (27.19 km²) would connect Kitulo National Park and Mpanga-Kipengere Game Reserve. Irungu Forest Reserve, 240.32 km , lies in the northwestern edge of the range, and abuts Kitulo National Park on the south. Chimala Scarp Forest Reserve, on the northern escarpment of the range overlooking
189-585: The Great Ruaha, on the south side of which is Mtorwe (2961 m), the highest known summit of the range. The Kitulo Plateau , formerly the Elton Plateau, is a high plateau in the northern part of the range, defined by tall ridges running northwest–southeast. Mtorwe and Ishinga (2688 m) overlook the Great Ruaha River valley, while Chaluhangi (2933 m) overlooks the Lake Malawi basin. Ngosi (2621 m)
210-645: The Kitulo Plateau. Montane evergreen forests occur in river valleys and hollows. The south-facing slopes at the northwestern end of the range, which were formerly the Livingstone Forest Reserve and are now part of Kitulo National Park, have the most extensive areas of montane evergreen forest. The Ndumbi forest, at the eastern end of Kitulo National Park, has montane evergreen and East African cedar ( Juniperus procera ) forests. Thickets of bamboo ( Yushania alpina ) can be found between
231-578: 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. 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
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#1732772730499252-603: The Usangu Plains lying to the north, was established in 1960 and covers and area of 180.68 km². Protected areas in the southern part of the range are not as extensive, as well-protected, or as studied as those in the north. They include the Madenge (1,146 ha), Mdando (5,140 ha), Msiora (315 ha) and Sakaranyumo (840 ha) forest reserves. 9°30′S 34°10′E / 9.500°S 34.167°E / -9.500; 34.167 Kitulo Plateau The Kitulo Plateau
273-469: The basin of the Great Ruaha River . Southwards the range terminates in the deep valley of the Ruhuhu River in 10° 30′ S, the first decided break in the highlands that is reached from the north along the east coast of Lake Malawi. Towards the south the range appears to have a width of some 20 miles only, but northwards it widens out to about 40 miles, though broken here by the depression, drained towards
294-480: The character of a plateau than of a true mountain range, but the latter name may be justified by the fact that they form a comparatively narrow belt of country, which falls considerably to the east as well as to the west. Most of the range lies above 2000 meters elevation. The northern end is well marked in 8° 50′ S by an escarpment falling to the Usangu Plains , the eastern branch of the East African Rift and
315-402: The high ridge that defines the northeastern edge of the Kitulo Plateau. From the town of Mbeya the range runs south-east and forms part of the eastern escarpment of the East African Rift , extending about 100 km down the north-eastern shore of the lake to the Ruhuhu River . The volcanic Poroto Mountains form a north-western extension of the range. In parts the range presents more
336-430: The interior of the range. Geologically the range is formed of ancient Precambrian rocks. A zone of gneiss runs along the southwestern face of the range overlooking Lake Malawi, in a series of ridges and valleys generally parallel to its axis. The ridge nearest the lake (Mount Jamimbi or Chamembe, at 9° 41′ S), rises to an absolute height of 2,400 metres (7,900 ft), falling 1,900 metres (6,200 ft) almost sheer to
357-475: The large rice irrigation schemes playing a major role. By 2019, the Great Ruaha experienced no water flow for several months per year. A report published by the World Bank listed the Great Ruaha as an endowment in crisis due to environmental factors. 7°56′S 37°52′E / 7.933°S 37.867°E / -7.933; 37.867 Kipengere Range The Kipengere Range , also known as
378-540: The older Precambrian rocks. Rainfall comes mostly from convectional thunderstorms originating above Lake Malawi. Mean annual rainfall on the Kitulo Plateau is 1500 mm, and rainfall is greater at higher elevations on slopes facing the lake. Most rainfall occurs during the November to May rainy season, and April is the wettest month. There is a May to October dry season, with nightly frosts common between June and August. Temperate crops can be raised with success. The range
399-428: The range's largest tracts of montane evergreen forest and bamboo thickets, and the park also includes the Kitulo Plateau's montane grasslands lying between the two forest reserves, and montane grasslands to the southeast. Mpanga-Kipengere Game Reserve was created in 2002, and covers an area of 1,574 km in the northeastern portion of the range, and an adjacent portion of the Usangu Plains. The game reserve incorporated
420-487: The upper montane forests and the high altitude grasslands. The range is surrounded at lower elevations by miombo woodland — Eastern miombo woodlands to the north, east, and south, and Central Zambezian miombo woodlands to the west. Kitulo National Park was created in 2005, and covers an area of 465.4 km . The new national park incorporated the Livingstone Forest Reserve (240.34 km²) and Ndumbi Valley forest Reserve (27.71 km², est. 1956). The forest reserves protected
441-490: The water, the same steep slope continuing beneath the surface. Northeast of Buanyi, as in the eastern half of the range generally, table-topped mountains occur, composed above of horizontally bedded quartzites , sandstones and conglomerates. The Poroto Mountains are volcanic in origin, and in the northwestern portion of the range younger volcanic rocks associated with the Rungwe Volcanic Province overlay
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