The Ahar River is a tributary of the Berach River which drains to the Banas River, a tributary of the Chambal river which drains to the Yamuna River, the principal tributary of Ganges River.
The river flows through Udaipur city. The outflow of Lake Pichola and Fateh Sagar Lake of Udaipur district enters the Ahar river. The river further downstream feeds Udaisagar Lake just outside Udaipur city.
Ahar River is also the site of 3000 BC to 1500BC Chalcolithic (copper-stone age) archaeological culture, the Ahar-Banas culture.Cache of Seal Impressions Discovered in Western India Offers Surprising New Evidence For Cultural Complexity in Little-known Ahar-banas Culture, Circa 3000-1500 B.C. University of Pennsylvania Museum of Archaeology and Anthropology
On the river bank in Udaipur there are royal cenotaphs (memorials) of Maharanas of Mewar called "Ahar ki Chhatriya" literally Ahar Cenotaphs.
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