Queis (river)
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Queis Kwisa |
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 The Queis near Trzebow |
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| Data | ||
| location | Lower Silesian and Lubusz Voivodeship , Poland | |
| River system | Or | |
| Drain over | Bober → Oder → Stettiner Haff | |
| source | on the Hohe Iserkamm on the northeast slope of the Wysoka Kopa 50 ° 51 ′ 21 ″ N , 15 ° 25 ′ 55 ″ E |
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| Source height | 1020 m | |
| muzzle | at Żelisław in the Bober coordinates: 51 ° 34 ′ 30 ″ N , 15 ° 23 ′ 42 ″ E 51 ° 34 ′ 30 ″ N , 15 ° 23 ′ 42 ″ E |
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| Mouth height | 110 m | |
| Height difference | 910 m | |
| Bottom slope | 7.2 ‰ | |
| length | 127 km | |
| Left tributaries | Miłoszowski Potok | |
| Reservoirs flowed through | Goldentraum dam , Marklissa dam | |
The Queis ( Polish Kwisa ) is a river in southwest Poland . It rises in several source streams on the Hohe Iserkamm on the northeast slope of the Wysoka Kopa , the highest mountain in the Jizera Mountains , which unite in the valley at the Ludwigsbaude on Sudetenstrasse . The Queis crosses the cities of Świeradów-Zdrój ( Bad Flinsberg ), Mirsk ( Friedeberg ), Gryfów Śląski ( Greiffenberg ), Leśna ( Marklissa ), Lubań ( Lauban ) and Nowogrodziec ( Naumburg am Queis ) and flows after 127 kilometers at the town of Żelisław ( Silber ) in the municipality of Małomice ( Mallmitz ) in the Bober river .
For centuries, the Queis formed the border between Upper Lusatia and Silesia and thus also the border between Germany and Poland for about 100 kilometers . This became obsolete when the King of Bohemia was able to acquire both Lusatia and Silesia in the 14th century. In 1815 part of Upper Lusatia fell to Prussia and was added to the Province of Silesia. In 1945 the land east of the Görlitzer Neisse including the Queis fell to Poland. On Queis lying Czocha Castle ( Czocha ) and the Kliczków Castle ( Kliczków ).
Since the first third of the 20th century, the river has been dammed in the Goldentraum and Marklissa reservoirs to protect against flooding .
