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. Fauna 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. Economy About 90% of the population in Singida Region is employed in the agricultural industry, which dominates the region's economy. The majority of the region's monetary revenue comes from agriculture, primarily from the production of maize, sweet potatoes, paddy, sorghum, peanut, cotton, sunflower, cashew nuts, and cassava. Next to agriculture, the livestock industry—which includes the poultry industry—plays a key role in the local economy. Agriculture In the Singida Region, the main food crops are maize, sweet potatoes, paddy, sorghum, and cassava. The primary food crop planted in the area is maize, which accounts for 45.9% of the cumulative annual average area under food crop cultivation. Sorghum is the next-largest crop, coming in at 23.5%, followed by sweet potatoes (14.0%) and finger millet (11.1%). Paddy (2.2%) and cassava (2.0%) were the other food crops grown. Three years, from 2016–17