The Olt is a river in Romania. It is 615 km (382 mi) long, and its basin area is 24,050 km2 (9,290 sq mi). It is the longest river flowing exclusively through Romania. Its average discharge at the mouth is 174 m3/s (6,100 cu ft/s). Its source is in the Hășmaș Mountains of the eastern Carpathian Mountains, near Bălan, rising close to the headwaters of the river Mureș. It flows through the Romanian counties Harghita, Covasna, Brașov, Sibiu, Vâlcea and Olt. The river was known as Alutus or Aluta in Roman antiquity. Olt County and the historical province of Oltenia are named after the river.
The Cerna is a left tributary of the river Olteț in Romania. It discharges into the Olteț near Budești. It flows through the communes Vaideeni, Slătioara, Stroești, Copăceni, Lăpușata, Lădești, Stănești, Fârtățești, Măciuca, Valea Mare and Bălcești. Its length is 164 km (102 mi) and its basin size is 618 km2 (239 sq mi).
The Ghimbășel is a left tributary of the river Bârsa in Romania. Its source is in the northern part of the Bucegi Mountains. Originally it discharged directly into the Olt, but much of its flow has been diverted into the Bârsa, another tributary of the Olt, near Colonia Bod. Its length is 67 km (42 mi) and its basin size is 533 km2 (206 sq mi). The former lower course of the Ghimbășel, downstream of this diversion, still exists and is used for the discharge of local inflows. It flows into the Olt north of Bod. Its length is 6 km (3.7 mi) and its basin size is 8 km2 (3.1 sq mi).
The Geoagiu is a right tributary of the river Mureș in Transylvania, Romania. It discharges into the Mureș in Teiuș. Its length is 49 km (30 mi) and its basin size is 187 km2 (72 sq mi).
The Olteț is a right tributary of the river Olt in Romania. It discharges into the Olt in Fălcoiu. Its total length is 185 km (115 mi), and its drainage basin area is 2,663 km2 (1,028 sq mi).
The Drăguș is a left tributary of the river Olt in Romania. It discharges into the Olt in Olteț. Its length is 13 km (8.1 mi) and its basin size is 25 km2 (9.7 sq mi).
The Balta Dascălului is a left tributary of the river Olteț in Romania. It flows into the Olteț near Cioroiu, close to the confluence of Olteț and Olt. Its length is 12 km (7.5 mi) and its basin size is 222 km2 (86 sq mi).
The Tărâia is a left tributary of the river Olteț in Romania. It discharges into the Olteț in Ocracu. Its length is 40 km (25 mi) and its basin size is 137 km2 (53 sq mi).
The Șasa is a left tributary of the river Olteț in Romania. It discharges into the Olteț in Gănești. It flows through the communes Roșiile and Tetoiu. Its length is 32 km (20 mi) and its basin size is 103 km2 (40 sq mi).
The Turdaș is a left tributary of the river Mureș in Romania. It discharges into the Mureș in the village Turdaș. Its length is 14 km (8.7 mi) and its basin size is 65 km2 (25 sq mi).
The Sebeș is a river in the Gurghiu Mountains, Mureș County, northern Romania. It is a left tributary of the river Mureș. It flows through the commune of Rușii-Munți, and joins the Mureș in the village Sebeș. Its length is 11 km (6.8 mi) and its basin size is 30 km2 (12 sq mi).
The Sălard is a small river in the Gurghiu Mountains, Mureș County, northern Romania. It is a left tributary of the river Mureș. It flows through the municipality Lunca Bradului, and joins the Mureș in the village Sălard. It is fed by several smaller streams, including the Pârâul Rece and Jirca. Its length is 18 km (11 mi) and its basin size is 126 km2 (49 sq mi).
The Borzontul Mare is a left tributary of the river Mureș in Romania. It discharges into the Mureș near Joseni. The upper reach of the river is also known as Putna. Its length is 15 km (9.3 mi) and its basin size is 46 km2 (18 sq mi).
The Călui is a right tributary of the river Olteț in Romania. It discharges into the Olteț near Oboga. Its length is 24 km (15 mi) and its basin size is 69 km2 (27 sq mi).
The Geamărtălui is a right tributary of the river Olteț in Romania. It discharges into the Olteț in the town Balș. 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 63 km (39 mi) and its basin size is 421 km2 (163 sq mi).
The Ilva is a right tributary of the river Mureș in Transylvania, Romania. It discharges into the Mureș in Lunca Bradului. Its length is 23 km (14 mi) and its basin size is 126 km2 (49 sq mi).
The Cuieșd is a right tributary of the river Mureș in Transylvania, Romania. It discharges into the Mureș in Cristești. Its length is 13 km (8.1 mi) and its basin size is 56 km2 (22 sq mi). Its name originates from the Hungarian “kő” for “stone”, so its name means “Stony Creek”.
The Budele is a left tributary of the river Olteț in Romania. It flows into the Olteț in Zătreni. Its length is 16 km (9.9 mi) and its basin size is 46 km2 (18 sq mi).
The Peșteana is a right tributary of the river Olteț in Romania. It discharges into the Olteț in Bălcești. It flows through the villages Poienari, Ghioroiu, Herăști, Știrbești, Căzănești and Bălcești. Its length is 36 km (22 mi) and its basin size is 99 km2 (38 sq mi).
Bălcești is a town located in Vâlcea County, Romania. The town administers eight villages: Benești, Cârlogani, Gorunești, Chirculești, Irimești, Otetelișu, Preoțești and Satu Poieni. It is situated in the historical region of Oltenia, at the south-western limit of the county, bordering on the Dolj and Olt counties.
