| Desná | |
| Source1 Location: | Loučná nad Desnou, Hrubý Jeseník |
| Mouth Location: | Morava |
| Mouth Coordinates: | 49.9092°N 16.93°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Czech Republic |
| Subdivision Type2: | Region |
| Subdivision Name2: | Olomouc |
| Length Km: | 43.4 |
| Discharge1 Avg: | 4.08m3/s near estuary |
| Basin Size Km2: | 337.8 |
The Desná (called Divoká Desná upstream; de|Tess) is a river in the Czech Republic, a left tributary of the Morava River. It flows through the Olomouc Region. It is 43.4km (27miles) long.
The Old Czech adjective desná meant 'right'. Because people went upstream when settling the landscape, the rivers with this name flowed as if from the right side (although they are actually left-side tributaries).[1] On the upper course, until its cofluence with the Hučivá Desná creek, the river is also called Divoká Desná.[2]
The Desná originates in the territory of Loučná nad Desnou in the Hrubý Jeseník at the elevation of and flows to Postřelmov, where it enters the Morava River at an elevation of . It is 43.4km (27miles) long. Its drainage basin has an area of 337.8km2.[3]
The longest tributaries of the Desná are:[4]
| Tributary | Length (km) | River km | Side | |
|---|---|---|---|---|
| 17.0 | 17.0 | left | ||
| Losinka | 12.3 | 16.5 | right | |
| Bratrušovský potok | 11.5 | 8.0 | right | |
| Malínský potok | 9.8 | 9.9 | left |
The river flows through the municipal territories of Loučná nad Desnou, Velké Losiny, Petrov nad Desnou, Rapotín, Vikýřovice, Šumperk, Dolní Studénky, Bludov, Sudkov and Postřelmov.
There are 95 bodies of water in the basin area. The largest of them are the Dlouhé stráně reservoirs with an area of (upper reservoir) and (lower reservoir), built on the Desná. It is known for the Dlouhé stráně Hydro Power Plant. There are two fishponds supplied with water from the lower course of the river.[3]
The upper course of the river flows through the Jeseníky Protected Landscape Area.