Topolnitsa (river)
| Topolnitsa | |
|---|---|
| The Topolnitsa as seen from Trakiya motorway | |
| Location | |
| Country | Bulgaria | 
| Physical characteristics | |
| Source | |
| • location | east of Bich, Sredna Gora | 
| • coordinates | 42°37′8.04″N 24°17′35.16″E / 42.6189000°N 24.2931000°E | 
| • elevation | 1,413 m (4,636 ft) | 
| Mouth | |
|  • location | Maritsa | 
|  • coordinates | 42°11′13.92″N 24°18′1.08″E / 42.1872000°N 24.3003000°E | 
|  • elevation | 205 m (673 ft) | 
| Length | 155 km (96 mi) | 
| Basin size | 1,789 km2 (691 sq mi) | 
| Basin features | |
| Progression | Maritsa→ Aegean Sea | 
The Topolnitsa (Bulgarian: Тополница [toˈpɔɫnit͡ʃɐ]) is a river in southern Bulgaria, an important left tributary of the Maritsa. The river's name is derived from the Bulgarian word топола, topola ("poplar"). Reaching length of 155 km, the Topolnitsa is the fourth longest river in the Maritsa drainage, following the Tundzha (390 km), the Arda (290 km) and the Ergene (281 km).