The Uniab River is an ephemeral river on Namibia's Skeleton Coast, located between Torra Bay and Terrace Bay. Its origin is in the Grootberg Mountains near Palmwag. Inflows of the Uniab are Kaikams, Kawakab, Aub, Urenindes and Obob. The river once created a large river delta with five main watercourses. Today it continues to flow only in one of the watercourses, but subterranean water surfaces as springs in the other channels. Uniab's catchment area is estimated to be between 3961 and 4,500 km2 (1,700 sq mi).