The Bezdna (Russian: Бездна) or Pasna (Chuvash: Пасна) is a river in Chuvashia, Russian Federation, a right-bank tributary of the Sura. It is 106 kilometres (66 mi) long, and has a drainage basin of 1,320 square kilometres (510 sq mi).[1]
| Bezdna, Pasna | |
|---|---|
| Location | |
| Country | Chuvashia, Russia |
| Physical characteristics | |
| Source | |
| • location | Shemurshinsky District |
| Mouth | Sura |
• location | Alatyr, Alatyrsky District |
• coordinates | 54°49′43″N 46°37′19″E |
| Length | 106 km (66 mi) |
| Basin size | 1,320 km2 (510 sq mi) |
| Basin features | |
| Progression | Sura→ Volga→ Caspian Sea |
Major tributaries are Abamza, Orbezdna, Black Bezdna. The maximal mineralization 500-700 mg/L. Average sediment in mouth per year is 71 mm. Drainage is regulated. In the upper stream use to dry.