| Osobłoga | |
| Name Other: | Osoblaha |
| Source1 Location: | Petrovice, Zlatohorská Highlands |
| Mouth Location: | Oder |
| Mouth Coordinates: | 50.4758°N 17.9708°W |
| Subdivision Type1: | Countries |
| Subdivision Type2: | Region/ Voivodeship |
| Length Km: | 65.5 |
| Discharge1 Avg: | 2.08m3/s on the Czech-Polish border |
| Basin Size Km2: | 921.1 |
The Osobłoga (cs|Osoblaha, de|Hotzenplotz) is a river in the Czech Republic and Poland, a left tributary of the Oder. It flows through the Moravian-Silesian Region in the Czech Republic and through the Opole Voivodeship in Poland. It is 65.5km (40.7miles) long.
The origin of the name is unclear.[1] The name is of pre-Slavic origin and there is a theory that name may be derived from the root as-, meaning 'dry'.[2]
The Osobłoga originates in the territory of Petrovice in the Zlatohorská Highlands at an elevation of and flows to Krapkowice, where it merges with the Oder River at an elevation of . It is 65.5km (40.7miles) long, of which 36.1km (22.4miles)[3] is in the Czech Republic. Its drainage basin has an area of 921.1km2, of which 758km2 is in Poland[4] and 163.1km2 is in the Czech Republic.[5]
The longest tributaries of the Osobłoga are:[3]
| Tributary | Length (km) | Side | |
|---|---|---|---|
| Prudnik / Prudník | 36.1 | left | |
| Biała | 35.2 | left | |
| Hrozová / Grozowy | 19.9 | right | |
| Mušlov | 13.9 | right |
The river flows through the municipal territories of Petrovice, Janov, Jindřichov, Vysoká, Dívčí Hrad, Bohušov and Osoblaha in the Czech Republic and through the territories of the gminas of Głogówek, Głubczyce, Strzeleczki and Krapkowice in Poland.
There are no fishponds or reservoirs built on the Osobłoga.[6]
Among the protected animal species living in the Osobłoga are the common minnow, Alpine bullhead and brook lamprey. The river is a nesting place for the common kingfisher.[6]