The Bistrița is a river in the Romanian region of Transylvania, Bistrița-Năsăud County. It is sometimes referred to as Bistrița ardeleană. Near the city of Bistrița it flows into the Șieu, a tributary of the Someșul Mare. Its length is 67 km (42 mi) and its basin size is 650 km2 (250 sq mi).
The Someș is a left tributary of the Tisza in Hungary and Romania. It has a length of 415 km (258 mi), of which 50 km are in Hungary. The Someș is the fifth largest river by length and volume in Romania. The hydrographic basin forms by the confluence at Mica, a commune about 4 km upstream of Dej, of Someșul Mare and Someșul Mic rivers. Someșul Mic originates in the Apuseni Mountains, and Someșul Mare springs from the Rodna Mountains.
The Someșul Mic is a river in north-western Romania. At its confluence with the Someșul Mare in Mica, the Someș is formed. Its total length is 178 km (111 mi), and its drainage basin area is 3,773 km2 (1,457 sq mi). It is formed at the confluence of two headwaters, Someșul Cald and Someșul Rece, that originate in the Apuseni Mountains. From the confluence, in Gilău, the Someșul Mic flows east and north through Cluj-Napoca, Apahida and Gherla, until it meets the Someșul Mare in Dej.
The Anieș is a right tributary of the river Someșul Mare in Romania. Upstream from its confluence with the Anieșul Mic, it is also referred to as Anieșul Mare. It discharges into the Someșul Mare in the village Anieș. Its length is 20 km (12 mi) and its basin size is 136 km2 (53 sq mi).
The Someșul Mare is a river in north-western Romania, originating in the Bistrița-Năsăud County in the Rodna Mountains at the confluence of two headwaters — the Preluci and the Zmeu. The Someșul Mare flows west through Rodna, Năsăud and Beclean, until it meets the Someșul Mic at Mica, upstream of Dej. Its length is 130 km (81 mi) and its basin size is 5,033 km2 (1,943 sq mi). Downstream from its confluence with the Someșul Mic, the river is called Someș.
The Lotru is a right tributary of the river Olt in Romania. Its source is in the Parâng Mountains. It feeds the reservoirs Vidra, Malaia and Brădișor. It flows into the Olt in Golotreni, near the town Brezoi. It passes through the communes Voineasa, Malaia, and Brezoi. Its length is 83 km (52 mi) and its basin size is 990 km2 (380 sq mi).
The Ilișua is a right tributary of the river Someșul Mare in Romania. It discharges into the Someșul Mare in Cristeștii Ciceului. Its length is 52 km (32 mi) and its basin size is 353 km2 (136 sq mi).
The Măria is a left tributary of the Someșul Mare in Romania. It discharges into the Someșul Mare near Valea Mare. Its length is 12 km (7.5 mi) and its basin size is 48 km2 (19 sq mi).
The Valea Mare is a right tributary of the river Someșul Mare in Romania. It discharges into the Someșul Mare in Reteag. Its length is 26 km (16 mi) and its basin size is 155 km2 (60 sq mi).
The Runc or Idieș is a right tributary of the river Someșul Mare in Romania. It discharges into the Someșul Mare in Mititei. Its length is 19 km (12 mi) and its basin size is 51 km2 (20 sq mi).
The Rebra is a right tributary of the river Someșul Mare in Romania. Its source is in the Rodna Mountains. It discharges into the Someșul Mare near Rebrișoara. Its length is 44 km (27 mi) and its basin size is 199 km2 (77 sq mi). The upper reach of the river, upstream from the confluence with the Gușatul Mare at Gura Rebra, is also known as Rebrișoara.
The Pârâul Băilor is a right tributary of the river Someșul Mare in Romania. It discharges into the Someșul Mare in Rodna. Its length is 14 km (8.7 mi) and its basin size is 62 km2 (24 sq mi).
The Cormaia is a right tributary of the river Someșul Mare in Romania. It discharges into the Someșul Mare 1 km (1 mi) upstream from Sângeorz-Băi. Its length is 21 km (13 mi) and its basin size is 102 km2 (39 sq mi).
The Valea lui Dan is a right tributary of the river Someșul Mare in Romania. It discharges into the Someșul Mare near Feldru. Its length is 13 km (8.1 mi) and its basin size is 19 km2 (7.3 sq mi).
The Firiza is a right tributary of the river Săsar in Maramureș County, Romania. It discharges into the Săsar in Baia Mare. Its length is 28 km (17 mi) and its basin size is 168 km2 (65 sq mi). The Strâmtori Dam is built on the river Firiza.
The Timiș or Timișul Sec is a right tributary of the river Ghimbășel in Romania. Its source is in the Piatra Mare Mountains, northeast of Predeal. It discharges into the Ghimbășel in Sânpetru. It flows through the eastern part of the city Brașov. Its length is 35 km (22 mi) and its basin size is 105 km2 (41 sq mi). Part of its water is diverted towards the Timiș Canal.
The Borșa is a left tributary of the river Someșul Mic in Romania. It discharges into the Someșul Mic in Răscruci. Its length is 38 km (24 mi) and its basin size is 267 km2 (103 sq mi).
The Valea Mărului is a left tributary of the river Someșul Mic in Romania. It discharges into the Someșul Mic in Iclod. Its length is 17 km (11 mi) and its basin size is 75 km2 (29 sq mi).
The Bârsa is a left tributary of the river Olt in Romania. It discharges into the Olt near Feldioara. Its source is in the Făgăraș Mountains. As several tributaries also have the name Bârsa, in order to differentiate them, the main course of the river is frequently referred to as Bârsa Mare. The river Ghimbășel, formerly a direct tributary of the Olt, was redirected towards the Bârsa. Its length is 73 km (45 mi) and its basin size is 937 km2 (362 sq mi).
The Bandău is a right tributary of the river Someșul Mic in Romania. It discharges into the Someșul Mic in Mica. Its length is 27 km (17 mi) and its basin size is 135 km2 (52 sq mi).
