[4] It leaves the border where it is joined by the Buyumpu River[a] from the east, then flows south and southeast.

[6] Below the Rwanda border the Kaburantwa is joined from the left (southeast) by the Nyarubugu and Nyakibaya, and from the right (northwest) by the Munyinya and the Nyarurama, Rubugenge and Rukasantwa.

[5] It then turns west and flows past Bukinanyana and Buganda to enter the Ruzizi River east of Ndava.

[8] In 2010 the Nile Basin Initiative asked for expressions of interest from consultants to prepare updated studies of the project.

[8] Gold miners use the Nyamagana, Muhira, Kaburantwa and Kagunuzi rivers in the provinces of Cibitoke, Bubanza and Kayanza to wash their products; builders extract rubble, gravel and sand for construction from the rivers; and farmers weaken their banks by failing to leave a 5 metres (16 ft) strip of uncultivated land along the banks.