Topolnitsa River

The Topolnitsa (Bulgarian: Тополница) is a river in southern Bulgaria, an important left tributary of the Maritsa. It takes its source from Bich Peak in Sredna Gora close to Koprivshtitsa; it is known as the Shirineyska in its upper course. Its average discharge is 55 m³/s and it is 135.6 kilometres (84.3 mi) long; its drainage basin covers 1,780 square kilometres (690 sq mi).[1] The Topolnitsa flows into the Maritsa near Pazardzhik after making a large turn under Trakiya motorway. The Topolnitsa Reservoir has a maximum volume of 120,000,000 cubic metres (4.2×10⁹ cu ft) and serves the area around Pazardzhik. Among the Topolnitsa's tributaries are the Mativir and the Bunovo River. The river's name is derived from the Bulgarian word топола, topola ("poplar").

Topolnitsa
The Topolnitsa as seen from Trakiya motorway
Location
Country	Bulgaria
Physical characteristics
Mouth
⁃ location	Maritsa
⁃ coordinates	42.1877°N 24.3006°E / 42.1877; 24.3006
Length	135.6 km (84.3 mi)[1]
Basin size	1,780 km2 (690 sq mi)[1]
Basin features
Progression	Maritsa→ Aegean Sea