Ekuma River is one of the three rivers that supply a majority of water to the pan in the Etosha National Park

Etosha National Park

Etosha National Park is a national park in the Kunene Region of northwestern Namibia. The park shares boundaries with the regions of Oshana, Oshikoto and Otjozondjupa....

 in Namibia

Namibia

Namibia, officially the Republic of Namibia , is a country in southern Africa whose western border is the Atlantic Ocean. It shares land borders with Angola and Zambia to the north, Botswana to the east and South Africa to the south and east. It gained independence from South Africa on 21 March...

. The other two rivers being Oshigambo River

Oshigambo River

The Oshigambo River is an ephemeral river in central northern Namibia, flowing into Etosha Pan. It almost never carries surface water but flowed and broke its banks in 2006, flooding Oshigambo, a village it cuts through....

 and Omurambo Ovambo River. They all flow erratically during rainy seasons and during very dry season

Dry season

The dry season is a term commonly used when describing the weather in the tropics. The weather in the tropics is dominated by the tropical rain belt, which oscillates from the northern to the southern tropics over the course of the year...

s they might not flow at all forming disconnected pools. However, the Ekuma River flows seasonally from the southern shores of Lake Oponono.
Its about 250 km long (155 miles)