It measures 110 km in length watershed includes 286 square kilometres (110 sq mi) of the districts of Rutsiro, Ngororero and Rubavu.

[1] It flows past the mission of Nyundo, established in 1901 on the banks of the river about 12 kilometres (7.5 mi) upstream from Gisenyi.

[2] Below Rubavu the river powers a hydroelectric system that provides electricity to the town of Gisenyi and to the local brewery.

[5] The mining releases large volumes of silt into the river, upsetting the natural balance.

[4] In 2013 the government provided assistance to families relocated out of the river protection zone, which was being rehabilitated.