Ruhuhu River
The Ruhuhu River is a river in Ruvuma Region, Tanzania. Geography
The source of the Ruhuhu is on the eastern slope of the Kipengere Range (Livingstone Mountains) in Tanzania, where it first flows southeast and then turns west to Lake Nyasa (Lake Malawi). It is over  long, of which the last  is a single deep gorge. The river's mouth is just south of Manda. Catchment area
At over  (between  depending on the data source), the Ruhuhu River Basin is the largest of the Malawiese River Basins and the largest in Tanzania. As the longest river flowing into Lake Malawi, by convention it is the headwaters of the Shire, which drains the lake. The Ruhuhu carries water all year round. Hydrometry
The discharge of the Ruhuhu was measured in m³/s for 43 years (1971-2015) at the Kikonge gauge, about  upstream of the mouth. However the values in other sources are higher by a factor of about four. The Tanzanian government decided in 2016 to install a hydroelectric power station with an expected capacity of  (Kikonge Hydroelectric Power Station) at this location. References 

Rivers of Tanzania
Geography of Ruvuma Region