Topčiderska Reka

Topčiderka
Topčiderka's mouth into Sava, at 44°47′31.8″N 20°25′31.1″E / 44.792167°N 20.425306°E / 44.792167; 20.425306.
Other name(s)	Topčider river
Country	Serbia
Basin features
Main source	Lipovička šuma, Kosmaj mountain, Serbia
River mouth	Sava, at Belgrade, Serbia 192 m (630 ft)
Basin size	147 km2 (57 sq mi)

Topčiderska reka (Serbian Cyrillic: Топчидерска река; literally, Topčider river), or colloquially Topčiderka (Топчидерка), is a river in north-central Serbia, a 30 km-long right tributary to the Sava river to which it flows in the urban section of Belgrade. It is one of the 40 rivers, streams and creeks that flow or used to flow through Belgrade (majority of them is conducted underground into the city sewage system).

The Topčiderka originates in the Lipovica (Lipovička suma) area, on the northern slopes of the Parcanski vis, the northern section of the Kosmaj mountain, at an altitude of 192 meters. Originally, it flows to the north-east, until it reaches the Belgrade's suburb of Ripanj, in the municipality of Voždovac. From there, the river flows generally into the north-west direction, along the Šumadija's geological bar into which the river carved its epigenetic valley and formed a watershed. The valley of Topčiderka is a natural route for the Belgrade-Niš railway.

After it flows between the villages of Pinosava and Rušanj (western slopes of the Avala mountain), the Topčiderka enters the urban section of Belgrade (Rakovica municipality) at the neighborhood of Resnik. It continues through the neighborhoods of Kijevo, Labudovo Brdo, Kneževac, Rakovica, Miljakovac and Kanarevo Brdo.

At this point, the river enters the territory of the municipality of Savski Venac where the vast woods of Topčider are formed. After the Topčiderka passes next to the Konak of Prince Miloš and the Belgrade hippodrome, it empties into the Čukarica Bay of the Sava river, across the northern tip of the Ada Ciganlija island, at an altitude of 69 meters. It drains an area of 147 km² (out of which 70% is agricultural land) with 35 tributaries and belongs to the Black Sea drainage basin.