The Geamărtălui (also: Gemărtălui) is a right tributary of the river Olteț in Romania. It discharges into the Olteț in the town Balș.Geamartalui (jud. Olt), e-calauza.ro The following towns and villages are situated along the river, from source to mouth: Velești, Balota de Sus, Balota de Jos, Bușteni, Gaia, Murgași, Picăturile, Plopșorelu, Tabaci, Vulpeni, Gropșani, Găvănești, Dâmburile, Baldovinești and Balș. Its length is and its basin size is .
Tributaries
The following rivers are tributaries to the river Geamărtălui (from source to mouth):
Left: Bejanul, Pârâul Mijlociu, Horezu Right: Valea Satului, Valea Gorgota, Ungureni, Bălășița
References