Former rivers

mythic river mentioned in the Vedas and ancient Indian epics and that probably existed in archeologic periods

300px|thumb|Map of the Zayandeh river and the Zayandeh/Gavkhouni drainage basin thumb|right|The Origin of Zayanderud, Koohrang tunnel extracts water from inside the Zagros Mountains. 300px|thumb|Zayanderud, summer 2015 thumb|Zayanderuz, summer 2018 thumb|Zayanderud, 2018 The Zayanderud or Zayandehrud (; from "fertile" or "life-giver", and "river"), also spelled as Zayanderud or Zayanderood, ..., is the largest river of the Iranian Plateau in central Iran.

The Uzboy () was a distributary of the Amu Darya river which flowed through the northwestern part of the Karakum Desert of Turkmenistan until the 17th century, when it abruptly dried up, eliminating the agricultural population that had thrived along its banks. It was a part of the ancient region of Dahistan.

The Ilisos or Ilisus (, ) is a river in Athens, Greece. Originally a tributary of the Kifisos, it has been rechanneled to the sea. It is now largely channeled underground, though as of June 2019 there were plans to unearth the river. Together with the neighbouring river Kifisos, it drains a catchment area of .

ancient river bed in the U.S. state of Washington

right|thumb|The Vlie,

ancient tributary of the Yellow River

former river in Yukon, Canada

river that flowed where the Baltic Sea is now

ancient, inactive river in Algeria

thumb|Pier Leone Ghezzi, The Purification of Aeneas in the River Numicius (ca. 1725) The Numicus was a river of ancient Latium which flowed into the sea between the towns of Lavinium and Ardea. According to the mythology of Livy, Aeneas lies buried on its banks (from the original: 'Situs est, quemcumque eum dici ius fasque est super Numicum flumen'). The river is also represented in ancient texts as a river-god Numicius (Greek: Νουμικίος, Numikíos). As described by Ovid, at the behest of Venus, Numicus cleans Aeneas of all of his mortal parts so that he might become a god, known as Indiges.

former river in Washington state, United States

thumb|Location of omiramba in the border area of Namibia and Botswana. Omuramba (plural: Omiramba) is the term for ancient river-beds found in the Kalahari Desert of Africa, notably in the North Eastern part of Namibia and North Western part of Botswana. The word is taken from the Herero language. An omuramba provides occasional standing pools of water and more fertility than in the surrounding sand plains. Some specific omiramba are named: Eiseb, Rietfontein, Epukiro, Omatako. They mostly start in the central parts of Namibia and run into the central parts of Botswana.

river in Constantinople

The Härjapea (, lit. oxhead) was a river in Tallinn, Estonia. The river was a few kilometres in length, flowing from Lake Ülemiste into Tallinn Bay.

river in eastern Sicily

wadi in Western Sahara and Mauritania

prehistoric river

Nabalia is an ancient river in the Netherlands that has been mentioned once by the Roman historian Tacitus, in his Histories (5:26).

Washington, D.C. creek relocated into underground tunnels