Major Rivers and Mountain Ranges of Ethiopia

Ethiopia's Hydro-Geological Backbone

Major Rivers (All Nile Tributaries)

• Blue Nile (Abay): 1,450 km in Ethiopia (of 1,600 km total). Source: Lake Tana. Contributes ~60% of Nile's water, 90%+ of flood sediment. Grand Ethiopian Renaissance Dam (GERD) on Blue Nile.
• Tekeze (Setit/Atbara): ~700 km in Ethiopia. North-flowing, joins Atbara in Sudan. Deep canyon (Tekeze Gorge). Tekeze Dam (300 MW).
• Baro-Akobo-Sobat: Southwest (Gambella). White Nile tributary. Navigable seasonally.
• Omo River: South → Lake Turkana (Kenya). Gibe III Dam. UNESCO Lower Omo Valley cultures.
• Wabe Shebelle & Genale (Juba): Southeast → Somalia/Indian Ocean. Irrigation for Somali Region.
• Awash River: NE Rift Valley → Lake Abbe (Djibouti). Only river entirely in Ethiopia. Awash National Park, industry, Addis supply.

Major Mountain Ranges

• Ethiopian Highlands (The "Roof of Africa"): Massive plateau bisected by Great Rift Valley.
  • Western Highlands: Higher, wetter. Mount Ras Dashen (4,533 m / 14,872 ft) — highest in Ethiopia (Simien Mtns).
  • Eastern Highlands: Lower, arid. Bale Mountains, Arsi Mountains.
• Simien Mountains (NW): Dramatic basalt cliffs, endemic wildlife (Gelada baboon, Walia ibex, Ethiopian wolf). UNESCO World Heritage.
• Bale Mountains (SE): Afro-alpine moorland (Sanetti Plateau), Harenna Forest. Endemic: Mountain nyala, Ethiopian wolf. Tullu Dimtu (4,377 m) 2nd highest.
• Arsi Mountains: Volcanic, forest, coffee. Chilalo (4,036 m).
• Tigray Highlands (North): Sandstone cliffs, rock-hewn churches (Gheralta).

Rift Valley

Great East African Rift splits the highlands (NE-SW). Lakes: Ziway, Langano, Abijatta, Shala, Awasa, Abaya, Chamo. Volcanoes: Fantale, Aluto, Corbetti.