Thaya

For the town of the same name, see Thaya, Austria.

Thaya (Dyje)
Thaya in Břeclav
Origin	near Panenská Rozsíčka
Mouth	Morava River
Basin countries	Czech Republic, Austria
Length	235.4 km
Source elevation	410 m
Mouth elevation	148 m
Avg. discharge	43.9 m³/s
Basin area	13,419 km²

The Thaya (Czech: Dyje [ˈdɪjɛ]) is a river in Central Europe, the longest tributary to the Morava River. It is about 235 km (311 km with its longest source) long and meanders from west to east in the border area between Lower Austria (Austria) and South Moravia (Czech Republic), though the frontier does not exactly follow the river's course in most parts. Its source is in two smaller rivers, namely the German Thaya (Deutsche Thaya) and the Moravian Thaya (Czech: Moravská Dyje, German: Mährische Thaya), flowing together at Raabs.

Its name means "the inert". There is also a small village which bears the name Dyje, located near Znojmo.

Geography

In its upper reaches, the Thaya flows through deep gorges (Podyjí), along which it passes many castles and chateaus. In Moravia, it has been dammed in several locations.

Thaya gathers waters from the western half of Moravia and the adjacent part of Lower Austria. Its biggest tributaries are Svratka and Jihlava, flowing together into the middle one of the Nové Mlýny reservoirs.

Thaya River near Znojmo.

Important cities and towns along the Thaya:

• Raabs an der Thaya
• Drosendorf-Zissersdorf
• Vranov nad Dyji
• Hardegg
• Znojmo
• Laa an der Thaya
• Lednice
• Břeclav

Dams

All the dams are situated in Czech Republic. They are used for irrigation, hydroelectricity and flood protection.

Dam Name	Dimension Level Altitude	Qav	Q100	Qmax.	Power Station	Type	Qpp
Vranov	348,45	9.74m3s−1	260m3s−1	364m3s−1	18.9 MW	Conventional	45m3s−1
Znojmo	225,6	10.25m3s−1	280m3s−1	379m3s−1	1.4 WM	run-of-the-river	12m3s−1
Nove Mlyny I (upper reservoir)	171,4	13.3m3s−1	290m3s−1	see lower reservoir	N/A	N/A	N/A
Nove Mlyny II (middle reservoir)	170,35	40.9m3s−1	see lower reservoir	see lower reservoir	N/A	N/A	N/A
Nove Mlyny III (lower reservoir)	170,35	40.9m3s−1	820m3s−1	657m3s−1	2.4 MW	run-of-the-river	48m3s−1