Oslava
title: "Oslava" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["rivers-of-the-vysočina-region", "rivers-of-the-south-moravian-region", "rivers-of-the-czech-republic"] topic_path: "general/rivers-of-the-vysocina-region" source: "https://en.wikipedia.org/wiki/Oslava" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::data[format=table title="Infobox river"]
| Field | Value |
|---|---|
| name | Oslava |
| image | Oslava river near Motorpal in Velké Meziříčí, Žďár nad Sázavou District.jpg |
| image_caption | The Oslava in Velké Meziříčí |
| source1_location | Matějov, Křižanov Highlands |
| source1_coordinates | |
| mouth_location | Jihlava |
| mouth_coordinates | |
| progression | |
| subdivision_type1 | Country |
| subdivision_name1 | Czech Republic |
| subdivision_type2 | Regions |
| subdivision_name2 | |
| length_km | 101.2 |
| source1_elevation | 584 m |
| mouth_elevation | 205 m |
| discharge1_avg | 3.47 m3/s near estuary |
| basin_size_km2 | 867.0 |
| :: |
| name = Oslava | image = Oslava river near Motorpal in Velké Meziříčí, Žďár nad Sázavou District.jpg | image_caption = The Oslava in Velké Meziříčí | source1_location = Matějov, Křižanov Highlands | source1_coordinates = | mouth_location = Jihlava | mouth_coordinates = | progression = | subdivision_type1 = Country | subdivision_name1 = Czech Republic | subdivision_type2 = Regions | subdivision_name2 = | length_km = 101.2 | source1_elevation = 584 m | mouth_elevation = 205 m | discharge1_avg = 3.47 m3/s near estuary | basin_size_km2 = 867.0 The Oslava is a river in the Czech Republic, a left tributary of the Jihlava River. It flows through the Vysočina and South Moravian regions. At 101.2 km, it is the 24th longest river in the Czech Republic.
Etymology
The first written mention of the river is from 1146, when it was called Ozlawa in a Latin text. According to one theory, the name is derived from the old Czech word osla, which meant 'grind' and referred to the stones suitable for grinding that were found in the river. According to another theory, the name comes from the Celtic (Gaelic) òs, òsa, meaning 'slow flowing water'.
Characteristic
::figure[src="https://upload.wikimedia.org/wikipedia/commons/7/7c/Oslavany,_Oslava,_pohled_z_mostu.jpg" caption="The Oslava in Oslavany"] ::
The Oslava originates in the territory of Matějov in the Křižanov Highlands at an elevation of 584 m and flows to Ivančice, where it enters the Jihlava River at an elevation of 205 m. It is 101.2 km long, which makes it the 24th longest river in the Czech Republic. Before the remeasurement, its length was stated as 99.2 km until 2013 and then 99.6 km until 2021. After a survey by hydrologists, the location of the spring was specified according to the most abundant source and the length of the entire river was redefined. Its drainage basin has an area of 867.0 km2.
The longest tributaries of the Oslava are: ::data[format=table]
| Tributary | Length (km) | River km | Side |
|---|---|---|---|
| Balinka | 31.1 | 60.3 | right |
| Chvojnice | 21.0 | 17.6 | left |
| Bohdalovský potok | 17.0 | 83.0 | right |
| Oslavička | 15.1 | 58.1 | right |
| Okarecký potok | 13.0 | 32.6 | right |
| Jasinka | 12.8 | 39.4 | left |
| Babačka | 10.7 | 70.6 | left |
| Polomina | 10.4 | 47.3 | left |
| :: |
Settlements
::figure[src="https://upload.wikimedia.org/wikipedia/commons/b/b0/Ivančice_-_soutok_Jihlavy_a_Oslavy,_obr01.jpg" caption="Confluence of the Oslava (in front) with the Jihlava"] ::
The largest town on the river is Velké Meziříčí. The river flows through the following settlements: Nové Veselí, Ostrov nad Oslavou, Velké Meziříčí, Náměšť nad Oslavou, Oslavany and Ivančice.
Bodies of water
The Mostiště Reservoir with an area of 88 ha is constructed on the river and is the largest body of water in the basin area. A notable body of water is also the fishpond Veselský rybník with an area of 81 ha.
Fauna
There were recorded 16 species of aquatic molluscs in the Oslava river: 8 species of gastropods and 8 species of bivalves. There lives endangered species of bivalve Unio crassus at the lower river section.
Tourism
The Oslava is suitable for river tourism. About 88 km of the river is navigable.
References
References
- "Historie města". Náměšť nad Oslavou.
- Svoboda, Jiří. (2011-09-08). "O původu názvů českých řek".
- Bárta, Jiří. (2021-05-08). "O pramen Oslavy, který je jinde, než určil Zeman, budou pečovat skauti". iDNES.cz.
- "Základní charakteristiky toku Oslava a jeho povodí". T. G. Masaryk Water Research Institute.
- "Vodní toky". [[Czech Hydrometeorological Institute]].
- Beran, Luboš. (2019-02-09). "Vodní měkkýši Oslavy [Aquatic molluscs of the Oslava River]". [[Malacologica Bohemoslovaca]].
- "Řeka Oslava – oblíbená řeka Českomoravské vrchoviny". CzechTourism.
- (2017-11-11). "Oslava – česká divočina". Pádler.
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