Tisza
The Tisza, Tysa or Tisa is one of the major rivers of Central and Eastern Europe. It was once called "the most Hungarian river" because it flowed entirely within the territory of the Kingdom of Hungary. Today, it crosses several national borders.
The Tisza begins near Rakhiv in Ukraine, at the confluence of the and, which is at coordinates . From there, the Tisza flows west, roughly following Ukraine's borders with Romania and Hungary, then briefly forming the border between Slovakia and Hungary, before entering into Hungary, and finally into Serbia. The Tisza enters Hungary at Tiszabecs, traversing the country from north to south. A few kilometers south of the Hungarian city of Szeged, it enters Serbia. Finally, it joins the Danube near the village of Stari Slankamen in Vojvodina, Serbia.
The Tisza drains an area of about and has a length of Its mean annual discharge is seasonally to. It contributes about 13% of the Danube's total runoff.
Attila the Hun is said to have been buried under a diverted section of the river Tisza.
Names and etymology
The river was known as the Tisia in antiquity; other ancient names for it included Pathissus. It may be referred to as the Theiss in older English references, after the German name for the river, Theiß. It is known as the Tibisco in Italian, and in older French references it is often referred to as the Tibisque.Another theory is that it is derived from Proto-Balto-Slavic *teišus meaning to describe the river.
Modern names for the Tisza in the languages of the countries it flows through include:
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Regulation
After several small-scale attempts, István Széchenyi organised the "regulation of the Tisza" which started on August 27 1846, and substantially ended in 1880. The new length of the river in Hungary was reduced to in total, with of dead channels and of new riverbed.
Lake Tisza
In the 1970s, the building of the Tisza Dam at Kisköre started with the purpose of helping to control floods as well as storing water for drought seasons. However, the resulting Lake Tisza became one of the most popular tourist destinations in Hungary since it had similar features to Lake Balaton at drastically cheaper prices and was not crowded.Navigation
The Tisza is navigable over much of its course. The river opened up for international navigation only recently; previously, Hungary distinguished "national rivers" and "international rivers", indicating whether non-Hungarian vessels were allowed or not. After Hungary joined the European Union, this distinction was lifted and vessels were allowed on the Tisza.Wildlife
The Tisza has a rich and varied wildlife. Over 200 species of birds reside in the bird reserve of Tiszafüred. The flood plains along the river boast large amounts of diverse plant and animal life. In particular, the yearly "flowering" of the Tisza is considered a local natural wonder. The flowering attracts vast numbers of mayflies which is a well known spectacle.In September 2020, colonies of magnificent bryozoans were discovered in the river.
Pollution
In early 2000, there was a sequence of serious pollution incidents originating from accidental industrial discharges in Romania. The first, in January 2000, occurred when there was a release of sludge containing cyanide from a Romanian mine and killed 2000 tons of fish. The second, from a mine pond at Baia Borsa, northern Romania, resulted in the release of of sludge containing zinc, lead and copper occurred in early March 2000. A week later, the third spill occurred at the same mining site at Baia Borsa, staining the river black, possibly including heavy metals.This series of incidents were described at the time as the most serious environmental disaster to hit central Europe since the Chernobyl disaster. Usage of river water for any purpose was temporarily banned and the Hungarian government pressed the Romanians and the European Union to close all installations that could lead to further pollution.
Examination of river sediments indicates that pollution incidents from mines have occurred for over a century.
Geography
Drainage basin
The Tisza River is part of the Danube River catchment area. It is the tributary with the largest catchment area. It accounts for more than 19% of the Danube river basin. The Tisza water system is shared by five countries: Ukraine, Slovakia, Hungary, Romania and Serbia.The Tisza River Basin area and average discharge by country
The 1800–2500 m high ridge of the Carpathian Mountains create in a semi circle the northern, eastern and southeastern boundary of the Tisza catchment. The western - southwestern reach of the watershed is comparatively low in some places – on its Hungarian and Serbian parts it is almost flat. The area is divided roughly along the centreline by the Carpathian Mountains, east of which lies the 400–600 m high plateau of the Transylvanian Basin, and the plains to the west. The highest summits of the river basin reach 1948 m in the Low Tatras, 2061 m in the Chornohora Mountains, 2303 m in the Rodna Mountains and even higher in the Retezat Mountains of the Southern Carpathians. Areas above elevations higher than 1600 m occupy only 1% of the total; 46% of the territory lies [|below] 200 m. The Tisza River Basin in Slovakia is predominantly hilly area and the highest mountain peak in Kráľova hoľa - in the Low Tatras Mountain Range at 1948 m. The lowland area lies in the south, forming the northern edge of the Hungarian Lowland. The lowest point in Slovakia is the village of Streda nad Bodrogom in the eastern Slovak lowland in the Bodrog River Basin. The Hungarian and Vojvodina part of the Tisza River Basin is a flat area bordered by small ranges of hills and mountains from the north and dominated by the Hungarian lowland.
Important hydrographic stations along the Tisza :
*Period: 1971–2000
Discharge
Average, minimum and maximum discharge of the Tisza River at Tiszabecs, Szolnok and Senta.Szeged
Water discharge of the Tisza River at the Szeged gauging station. Complete series from starting 1921.Szolnok
Water discharge of the Tisza River at the Szolnok gauging station. Period 1953–2022.Tributaries
The following rivers are tributaries to the river Tisza:- Vișeu
- Kosivska
- Shopurka
- Iza
- Sarasău
- Bic
- Săpânța
- Șaroș
- Teresva
- Baia
- Valea lui Francisc
- Tereblia
- Rika
- Batar
- Borzhava
- Tur
- Szamos
- *Someșul Mare
- **Șieu
- ***Bistrița
- *Someșul Mic
- **Someșul Cald
- **Someșul Rece
- Kraszna
- Bodrog
- *Ondava
- *Latorica
- **Laborec
- ***Uzh
- ***Cirocha
- **Stara
- **Vicha
- **Kerepets
- Sajó
- *Hornád
- Eger
- Zagyva
- Körös
- *Sebes-Körös
- **Berettyó
- *White-Körös
- *Black-Körös
- Maros
- *Arieș
- *Târnava
- **Târnava Mare
- **Târnava Mică
- Aranca
- Čik
- Jegrička
- Bega
*Period: 1971–2000
Cities and towns
The Tisza flows through the following countries and cities :- *Rakhiv
- *Tiachiv
- *Khust
- *Vynohradiv
- *Malé Trakany
- *Veľké Trakany
- *Biel
- *Sighetu Marmației
- *Vásárosnamény
- *Záhony
- *Tokaj
- *Tiszalök
- *Tiszaújváros
- *Tiszafüred
- *Szolnok
- *Tiszakécske
- *Csongrád
- *Szentes
- *Szeged
- *Kanjiža
- *Novi Kneževac
- *Senta
- *Ada
- *Mol
- *Bačko Petrovo Selo
- *Bečej
- *Novi Bečej
- *Titel