The Ouham River is a river in Central Africa , and one of the main headwaters of the Chari River . The Ouham originates in the Central African Republic between the Nana-Mambéré and Ouham-Pendé prefectures, crossing into Chad where it joins the Chari about 25 km north of Sarh . Tributaries are the Baba , Fafa , Nana Bakassa , and the Nana Barya .
1-633: The flow of the river observed over 33 years (1951–84) in Moïssala a town in Chad about 150 km above the mouth of the Chari. The at Moïssala observed average annual flow during this period was 480 m³ / s fed by an area of about 67,600 km approximately 95% of the total catchment area of the River. The average monthly flow of the river Sara at hydrological station of Moïssala (in m³ / s ) (Calculated using
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