Омо
Wolayta is limited north west by Tambaro, eastward by Bilate river which divides it from Arsi-Oromo, Southward by Lake Abaya and Kucha, westward by Omo River. Gilgel Gibe III Dam is a hydroelectric power plant built on Omo river; and with the capacity of 1870 Megawatt, it is the third largest hydroelectric plant in Africa.