| Blšanka | |
| Source1 Location: | Hradiště Military Training Area, Doupov Mountains |
| Mouth Location: | Ohře |
| Mouth Coordinates: | 50.3183°N 13.6094°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Czech Republic |
| Subdivision Type2: | Regions |
| Length Km: | 50.8 |
| Discharge1 Avg: | 1.05m3/s near estuary |
| Basin Size Km2: | 482.7 |
The Blšanka is a river in the Czech Republic, a right tributary of the Ohře River. It flows through the Ústí nad Labem and Karlovy Vary regions. It is 50.8km (31.6miles) long.
The river is named after the town of Blšany.
The Blšanka originates in the southern part of the Hradiště Military Training Area in the Doupov Mountains at an elevation of and flows to Zálužice, where it enters the Ohře River at an elevation of . It is 50.8km (31.6miles) long. Its drainage basin has an area of 482.7km2.[1]
The longest tributaries of the Blšanka are:[2]
| Tributary | Length (km) | Side | |
|---|---|---|---|
| Mlýnecký potok | 18.1 | left | |
| Podvinecký potok | 17.8 | right | |
| Očihovecký potok | 13.8 | right | |
| Radičeveská strouha | 13.4 | left | |
| Klučecký potok | 12.9 | right | |
| Černocký potok | 12.6 | right |
There are 257 bodies of water in the basin area. The largest of them is the Blatno fishpond with an area of . There are no fishponds or reservoirs built directly on the Blšanka.[1]
There are no notable settlements on the river. The largest settlement on the Blšanka is the town of Kryry. The river flows through the Hradiště Military Training Area and through the municipal territories of Valeč, Lubenec, Vroutek, Kryry, Očihov, Blšany, Libořice, Měcholupy, Holedeč, Liběšice and Zálužice.
Trout fishing is allowed in a long section on the upper course.[3]
The largest floods on the Blšanka (monitored since 1905) were in 1956, when the water level rose to . The most devastating flash floods were in 1872, when they killed over 100 people.[4]