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Singida Region

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Through Alluvium, Clay and Plateau

Geography

Singida Region is located below the equator between latitudes 3052’ and 7034’. Longitudinally the region is situated between 33027’ and 350 26’ east of Greenwich. To the north, it shares borders with Shinyanga Region; Arusha, Manyara and on the east borders Dodoma. To the south it shares borders with Iringa and Mbeya while on the west there is Tabora Region.

Singida Region has a total surface area of 49,438 km2, out of which 95.5 km2 or 0.19 percent are covered by water bodies of Lake Eyasi, Kitangiri, Singidani, Kindai, Munang and Balengida. The remaining 49,342.5 km2 is land area. It is the 5th largest in size and occupies about 5.6 percent of mainland Tanzania's total area of 881,289 km2. Manyoni District Council (57.9%) is the largest district in the Singida Region, followed by Ikungi District Council (14.9%), Iramba District, Singida District Council, Mkalama District Council, and Singida Municipality at the tail end.

Climate

The area is a portion of Tanzania's semi-arid central region, which has an unpredictable rainfall pattern, brief rainy seasons, and a fairly severe drought once every four years. There are significant geographic and seasonal variations in the annual total rainfall, which ranges from 500 mm to 800 mm. There are two seasons: the lengthy dry season from April/May to November and the brief rainy season from December to March (or occasionally up to April).

In the south-west of Manyoni District near Rungwa and along the escarpment at Kiomboi in Iramba District, where long-term mean annual rainfall surpasses 800 mm, respectively, are where Singida Region is wettest. Over a sizable portion of the Iramba and Singida districts, the mean annual rainfall falls between 600 mm and 800 mm. The driest section of the region, where the mean annual rainfall is less than 550 mm, is located on the eastern side of Manyoni District, close to the Bahi Swamp and the Rift Valley depression of Mgori and Shelui divisions. The average annual rainfall in the region is 700 mm.

The temperatures in the region vary according to altitude but generally range from about 15 °C in July to 30 °C during the month of October. Moreover, temperature differences are observed between day and night and may be very high, with hot afternoons going up to 35 °C and chilly nights going down to 10 °C.

The direction of the winds is determined by the monsoon season; they are north-easterly from November to March and south-easterly the rest of the year (dry season). The region is typically semi-arid from May to October because of the typically dry breezes in the area. The climatic influence of strong winds on moisture losses and consequent desertification is highlighted by the fact that maximal wind speeds occur with the time of greatest water scarcity.

Geology

The Wembere Steppe and the Bahi Swamp are frequently completely covered in alluviums, which are two main superficial geological deposits in the Singida Region. Alluviums are composed of sandy soil and clay which can be found in drainage depressions of all sizes and along watercourses. These alluvial deposits center regions share a coating of black dirt, or "mbuga," on the surface.

This clay has a high degree of flexibility and responds to variations in moisture content by clearly shrinking and swelling. Sandy colluvial or slope wash materials, created from the neighborhood's basement rocks, surround the "mbuga." Under shallow "mbuga," banded conglomerate limestone and, less commonly, silica are frequently formed. The second deposit is of Cainozoic consisting of cemented sand, literate and sandstone occupying only a very small proportion of the region.

Topography

The Singida Region is located in the northern portion of Tanzania's central plateau, which rises to elevations of 1,200 to 1,500 meters above sea level. A significant scarp that can reach heights of 180 meters, which is the eastern portion of the Great Rift Valley, surrounds the area on all sides with the exception of the south-eastern border. Massive outcrops or rocky peaks made of granite and metamorphic rocks are a notable aspect of the land escarpment in the Iramba and Singida areas. These outcrops, often referred to as inselbergs, are the remains of old land surfaces that have been eroded to create a vast, gently sloping peneplain in the nearby areas.

Drainage basins

The following are the fundamental drainage systems in the Singida Region: The only permanent river in the area is Sibiti, which originates in the Mkalama District and empties into Lake Kitangiri.

Ndurumo, Mpura, Kisukwani, and Wembere rivers originate in the Iramba District and flow north and northwest into Lake Kitangiri and the Eyasi Basin. Ponde and Bubu rivers originate in the Ikungi district and flow into the Bahi Swamp, which stretches across the Rift Valley's floor into the Dodoma Region.

Njombe River receives input from other rivers before joining Great Ruaha River and emptying into the Indian Ocean. The Wembere Plain or wetland is drained by rivers in the Ikungi District. Internal drainage affects a large portion of the plateau, creating salty and alkaline lakes including Singidani, Kindai, and Balengida Singida.

Flora

Bush or thickets in the uplands are examples of the vegetation that can be found there. Wetland vegetation is another thing, and it combines grassland with trees. In the Iramba and Central Singida districts (Ilongero/Mgori), bushland vegetation predominates. Parts of Ikungi District (Isuna, Ikungi, northern Manyoni, the northeastern portion of Itigi, and parts of Makanda) are covered in an impenetrable dense deciduous thicket of multisteamed shrubs known as "Itigi thickets." In areas of woodland grassland and on the edge of marsh vegetation, wetland vegetation is found in wetter "mbuga" that are inevitably inundated for extended periods during the wet season. Kintinku, Muhalala, and Saranda in Manyoni's northeast and Manyoni's southeast both have this type of vegetation.

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