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 / 42.6189000; 24.2931000
• 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 / 42.1872000; 24.3003000
• elevation	205 m (673 ft)
Length	155 km (96 mi)
Basin size	1,789 km2 (691 sq mi)[1]
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,^[2] 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).