| Bolshoy Uzen Ulken Uzen (Karaozen) Большой Узень Үлкен Өзен (Қараөзен) | |
|---|---|
.jpg) View of the river near Novouzensk | |
  Mouth location in Kazakhstan | |
| Location | |
| Countries | Russia Kazakhstan |
| Physical characteristics | |
| Source | Obshchy Syrt |
| • coordinates | 51°39′07″N 48°42′41″E / 51.65194°N 48.71139°E |
| • elevation | ca 120 m (390 ft) |
| Mouth | Kamys-Samar Lakes |
• coordinates | 48°55′46″N 49°54′46″E / 48.92944°N 49.91278°E |
• elevation | −8 m (−26 ft) |
| Length | 650 km (400 mi) |
| Basin size | 15,600 km2 (6,000 sq mi) |
| Discharge | |
| • average | 7.3 to 393 cubic metres per second (260 to 13,880 cu ft/s) at Novouzensk |
The Bolshoy Uzen (Russian: Большой Узень, lit. 'Big Uzen') or Ulken Uzen (Kazakh: Үлкен Өзен, lit. 'Big River' Úlken Ózen or Kazakh: Қараөзен, lit. 'Black River') is a river in Saratov Oblast of Russia and West Kazakhstan Province of Kazakhstan. It is 650 kilometres (400 mi) long, with a drainage basin of 15,600 square kilometres (6,000 sq mi).[1]
The town of Novouzensk is situated at the Bolshoy Uzen. The river is used for water supply and irrigation.