Athi River - Galana - Sabaki

Athi River – Galana – Sabaki is located in Eastern County in the Eastern Province of Kenya.

Athi River with a total length of 390 km is the second longest river in Kenya, and it drains its water in the Indian Ocean. It drains a basin area of 70,000 km².

The Athi River is called the Galana and Sabaki in its lower course. The upper Athi River drains the eastern slopes of the Aberdare Ranges north of Nairobi just, south of the Equator; the Tsavo River, its main tributary, drains the Kenyan slopes of Mt. Kilimanjaro. It is joined by the Nairobi River along its course. Near Thika town, its water drops down the Fourteen Falls, which was christened the name because it has 14 distinct falls. The Athi River then cuts across the Athi plains and near Athi town. It enters the Indian ocean just north of Malindi as Galana River, and is also known as Sabaki River.

Other Tributaries
Perennial tributaries include the Mbagathi, Ngong, Ruiru, Thiririka, Nairobi, Mathare, Ndarugu, Kiboka, Kibwezi, and Tsavo Rivers.

Ephemeral tributaries include the Thwake, Kaiti, Muooni, Makindu and Mtito Andei Rivers. To the west in Taveta, the Lumi River (a trans-boundary water resource) is perennial, fed by the Njoro kubwa Springs.
In the coastal zone there are a number of small rivers, including the Mkurumudzi, the Ramisi, the Mwache and the Umba.

Significant lakes in the catchment include:
• Lake Jipe
• Lake Challa
• Lake Amboseli

Ref: http://fortuneofafrica.com/kenya/athi-river/