Thaya
The Thaya is a river in the Czech Republic and Austria, a right tributary of the Morava River. It flows through the South Moravian Region in the Czech Republic and through Lower Austria in Austria. It is formed by the confluence of the German Thaya and Moravian Thaya rivers. Together with the German Thaya, which is its main source, the Thaya is long. Without the German Thaya, it is long. In the Czech Republic, the Thaya is the seventh longest river in the country with a length of.
Etymology
Both the names Thaya and Dyje have their origin in the Illyrian word 'duja', which can be translated as 'rushing river'. The first written mention of Thaya is from 985, when the name was written as Taja.Characteristic
From a water management point of view, the Thaya and German Thaya are two different rivers with separate numbering of river kilometres. From a broader point of view, the Thaya originates in the territory of Schweiggers at an elevation of and flows to Lanžhot, where it enters the Morava River at an elevation of. The confluence of the Thaya and Morava is the southernmost and the lowest point of Moravia.The Thaya is long, of which is in the Czech Republic, making it the seventh longest river in the country. Its drainage basin has an area of, of which is in the Czech Republic. The name Thaya is used from the confluence of the German Thaya with the Moravian Thaya in Raabs an der Thaya and from this point to the confluence with the Morava, the river is long.
The Thaya has 573 tributaries. The sources and longest tributaries of the Thaya are:
| Tributary | Length | River km | Side |
| Svratka | 168.5 | 66.0 | left |
| Kyjovka | 88.1 | 8.0 | left |
| Jevišovka | 81.7 | 83.1 | left |
| German Thaya | 75.8 | 235.1 | – |
| Moravian Thaya | 68.2 | 235.1 | left |
| Pulkau | 61.0 | 97.5 | right |
| Želetavka | 55.8 | 190.7 | left |
| Trkmanka | 41.7 | 34.5 | left |
| Štinkovka | 14.3 | 46.5 | left |
| Gránický potok | 13.5 | 132.5 | left |
Notable indirect right tributaries are the streams Včelínek and Daníž, which flow to the artificial canals of the Thaya.
Settlements
The most populated settlements on the river are the towns of Znojmo and Břeclav. The river flows through or along the following municipalities: Raabs an der Thaya, Ludweis-Aigen, Japons, Drosendorf-Zissersdorf, Vratěnín, Stálky, Uherčice, Podhradí nad Dyjí, Oslnovice, Starý Petřín, Bítov, Chvalatice, Lančov, Vranov nad Dyjí, Horní Břečkov, Hardegg, Lukov, Podmolí, Havraníky, Znojmo, Dobšice, Dyje, Tasovice, Krhovice, Strachotice, Slup, Valtrovice, Křídlůvky, Jaroslavice, Hrádek, Dyjákovice, Laa an der Thaya, Hevlín, Hrabětice, Hrušovany nad Jevišovkou, Wildendürnbach, Jevišovka, Drnholec, Brod nad Dyjí, Dolní Dunajovice, Pasohlávky, Dolní Věstonice, Pavlov, Milovice, Přítluky, Bulhary, Lednice, Podivín, Ladná, Břeclav, Bernhardsthal, Rabensburg, Hohenau an der March and Lanžhot.Bodies of water
There are 7,225 bodies of water in the basin area within the Czech Republic. The largest of them are the three Nové Mlýny reservoirs, built directly on the Thaya. Other reservoirs built on the river are the Znojmo and Vranov reservoirs.Nature
The river flows through the Podyjí and Thayatal national parks. Among the protected species that live in the river are the European crayfish and brown trout. The river is also a nesting place for the common kingfisher.The area of the confluence of the Morava and Thaya, which also includes many pools, oxbow lakes and channels, is the most valuable ichthyological site in the country. About 80% of native Czech fish species can be found there, and 15% of them are endemic, living only there. Since 2024, the area of the confluence has been protected as a protected landscape area called Soutok.