| Výrovka | |
| Source1 Location: | Uhlířské Janovice, Upper Sázava Hills |
| Mouth Location: | Elbe |
| Mouth Coordinates: | 50.1681°N 14.9831°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Czech Republic |
| Subdivision Type2: | Region |
| Subdivision Name2: | Central Bohemian |
| Length Km: | 61.9 |
| Discharge1 Avg: | 1.94m3/s near estuary |
| Basin Size Km2: | 542.5 |
The Výrovka (also called Vavřinecký potok upstream) is a river in the Czech Republic, a left tributary of the Elbe River. It flows through the Central Bohemian Region. It is 61.9km (38.5miles) long.
The Výrovka originates in the territory of Uhlířské Janovice in the Upper Sázava Hills at an elevation of and flows to Kostomlátky, where it enters the Elbe River at an elevation of . It is 61.9km (38.5miles) long. Its drainage basin has an area of 542.5km2.[1] The average discharge at its mouth is 1.94 m3/s.[2]
The longest tributaries of the Výrovka are:[3]
| Tributary | Length (km) | River km | Side | |
|---|---|---|---|---|
| Šembera | 28.2 | 3.4 | left | |
| Bečvárka | 21.7 | 23.2 | right | |
| Blinka | 12.2 | 21.6 | right | |
| Káča | 12.0 | 5.1 | right |
The most populated settlement on the river is the town of Uhlířské Janovice, where the river originates. The river also briefly crosses the territory of Nymburk. The river further flows through the municipal territories of Uhlířské Janovice, Vavřinec, Zásmuky, Církvice, Barchovice, Toušice, Kouřim, Klášterní Skalice, Třebovle, Zalešany, Žabonosy, Plaňany, Vrbčany, Radim, Chotutice, Dobřichov, Ratenice, Vrbová Lhota, Písková Lhota, Kostelní Lhota, Hořátev, Zvěřínek, Písty, Nymburk and Kostomlátky.
There are 441 bodies of water in the basin area. The largest of them is the fishpond Vavřinecký with an area of, built directly on the river.[1] A system of several small fishpond is located on the upper course of the river near the spring.
The upper course of the Výrovka is suitable for river tourism, but it is navigable only when water is released from Vavřinecký Pond.[4]