Heavy rainfall in the volcanoes area often results in floods. Whereas the observed floods may appear similar in nature, the dynamics of floods in the volcanoes area are quite different according to their locations: classic torrential rivers in the Musanze urban area and Sebeya catchment, flooded endorheic areas (catchments without external outlet) in Byangabo sector, and flooded “dry thalwegs” north east of Rubavu disctrict. A study was implemented by “Water for Growth Rwanda”. This memo provides the final results. The main studied rivers are the following ones :

• Musanze-city sector: Rivers Rwebeya, Muhe and Susa

• Byangabo plateau sector: Rivers Murufurwe, Mutobo, Kinoni, Bikwi, Rungu and Nyabitondore.

• Sebeya Catchment: Rivers Sebeya, Karambo and Pfunda