| Lužnička | |
| Source1 Location: | Krásná Lípa, Lusatian Mountains |
| Mouth Location: | Mandau |
| Mouth Coordinates: | 50.8989°N 14.6656°W |
| Subdivision Type1: | Countries |
| Subdivision Type2: | Regions/ States |
| Length Km: | 15.3 |
| Discharge1 Avg: | 0.6m3/s on the Czech-German border |
| Basin Size Km2: | 58.9 |
The Lužnička (de|Lausur) is a stream in the Czech Republic and Germany, a right tributary of the Mandau River. It flows through the Ústí nad Labem Region and through Saxony. It is 15.3km (09.5miles) long.
The Lužnička originates in the territory of Krásná Lípa in the Lusatian Mountains, at an elevation of .[1] It flows to Großschönau, where it merges with the Mandau River at an elevation of . It is 15.3km (09.5miles) long, of which 11.9km (07.4miles) is in the Czech Republic.[2] [3] Its drainage basin has an area of 58.9km2,[3] of which 42.8km2 is in the Czech Republic.[1]
Tributaries include only small brooks. The longest tributaries of the Lužnička are:[4]
| Tributary | Length (km) | Side | |
|---|---|---|---|
| Lesenský potok | 4.9 | right | |
| Waltersdorfer Dorfbach | 4.8 | right | |
| Matyáska | 3.2 | right | |
| Malý Stožecký potok | 2.6 | right |
Most of the river bed is significantly modified and bank stabilization is carried out.[2] The Lužnička flows through the municipal territories of Krásná Lípa, Rybniště, Horní Podluží, Dolní Podluží and Großschönau.
On the upper course of the stream is built the fishpond Velký rybník. It has an area of . The pond and its surroundings is protected as the Velký rybník Nature Reserve on an area of . The area of wetlands, reedbeds, waterlogged meadows and wet forest is an important migration route for migratory birds. More than 170 bird species were documented there.[5] [6]