The Omaruru River is a major river crossing the Erongo Region

Erongo Region

Erongo is one of the 13 regions of Namibia. It comprises the Swakopmund magisterial district up to the Ugab River and includes Walvis Bay, Omaruru and Karibib magisterial districts. This region is named after Erongo mountain, a well known landmark in Namibia and in this area...

 of western central 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...

 from East to West. It originates in the Etjo mountains, crosses the city of Omaruru

Omaruru

Omaruru may refer to:* Omaruru, Namibia* Omaruru Constituency* Omaruru River...

 and reaches the sea a few kilometers north of Henties Bay.

The Omaruru is an ephemeral

Ephemeral

Ephemeral things are transitory, existing only briefly. Typically the term is used to describe objects found in nature, although it can describe a wide range of things....

 river with a mean run-off of roughly 40 million cubic metres per annum. Its palaeochannel

Palaeochannel

Palaeochannels or paleochannels are deposits of unconsolidated sediments or semi-consolidated sedimentary rocks deposited in ancient, currently inactive river and stream channel systems. The word palaeochannel is formed from the words "palaeo" or 'old', and channel; ie; a palaeochannel is an old...

s form an underground delta

River delta

A delta is a landform that is formed at the mouth of a river where that river flows into an ocean, sea, estuary, lake, reservoir, flat arid area, or another river. Deltas are formed from the deposition of the sediment carried by the river as the flow leaves the mouth of the river...

 of the Namib Desert

Namib Desert

The Namib Desert is a desert in Namibia and southwest Angola that forms part of the Namib-Naukluft National Park, the largest game reserve in Africa. The name "Namib" is of Nama origin and means "vast place"...

.