# Sajó

The Sajó (Hungarian pronunciation: SHOH-yoe, Hungarian) or Slaná (Slovak) is a river in Slovakia and Hungary.
Its length is 229 km, of which 110 km is in Slovakia. Its source is in the Stolica Mountains range of the Slovak Ore Mountains. It flows through the Slovak town Rožňava and the Hungarian city Miskolc. In Hungary Sajó flows through the county of Borsod-Abaúj-Zemplén. It flows into the River Tisza near Tiszaújváros. Its main tributaries are the Bodva and the Hornád. It is also known for the Battle of the Sajó River from 11 April 1241 between the Mongol Empire and the Kingdom of Hungary.

## Geography

Catchment area of the Sajó river by country:
| River | Area by country | Area by country | Area by country | Area by country |
| River | Slovakia | Slovakia | Hungary | Hungary |
| River | (km$^2$) | (%) | (km$^2$) | (%) |
| Sajó | 3,217 | 25.3 | 2,328 | 18.3 |
| Bódva | 858 | 6.8 | 869 | 6.8 |
| Hernád | 4,423 | 34.8 | 1,013 | 8.0 |
| | 8,498 | 66.9 | 4,210 | 33.1 |
| Sajó River Basin | 12,708 km$^2$ | 12,708 km$^2$ | 12,708 km$^2$ | 100.0% |
Important hydrological stations along the Sajó river:
| Station | River kilo-meter (rkm) | Altitude (m) | Basin size (km$^2$) | Average discharge (m$^3$/s) |
| Hungary |||||
| Tiszaújváros (near mouth) | 0.0 | 91 | 12,869.6 | 78.623 |
| Kesznyéten | 10.5 | 94 | 12,131.9 | 75.582 |
| Ónod | 34 | 104 | 6,691 | 36.701 |
| Felsőzsolca | 50.9 | 114 | 6,591.9 | 36.276 |
| Miskolc | 53.9 | 116 | 6,591.9 | 36.146 |
| Kazincbarcika | 88.4 | 135 | 4,361 | 24.473 |
| Sajópüspöki, Bánréve | 123.6 | 155 | 3,204.7 | 20.55 |
| Slovakia |||||
| Lenartovce (Sajólénártfalva) | 127.2 | 157 | 1,829.65 | 14.5 |
| Bretka (Beretke) | 149.8 | 193 | 889.12 | 6.075 |
| Rožňava (Rozsnyó) | 175.5 | 276.6 | 301.53 | 3.264 |
| Gemerská Poloma (Veszverés) | 184.3 | 320.9 | 201.6 | 2.622 |
| Vlachovo (Oláhpatak) | 198.6 | 412 | 123.16 | 2.051 |
| Vyšná Slaná (Felsősajó) | 201.3 | 440.9 | 60.28 | 0.696 |

## Tributaries

Complete list of streams (slovak 'potok'; Hungarian 'patak') and rivers flowing into the Sajó (from the estuary upwards):
| Left tributary | Right tributary | Length (km) | Basin size (km$^2$) | Average discharge (m$^3$/s) |
| Hungary |||||
| Inér-háti-főcsatorna | | 10.2 | 55 | 0.089 |
| Takta | | 63.8 | 620.6 | 2.951 |
| | Hejő-Szarda-övcsatorna | | | |
| Hernád | | 282.2 | 5,436.4 | 38.555 |
| Kis-Sajó | | 20.9 | 85.8 | 0.16 |
| | Szinva | 18.5 | 159.4 | 0.733 |
| | Bábony-patak | 9.5 | 26.9 | 0.122 |
| Bódva | | 110.7 | 1,727.3 | 9.983 |
| | Harica | 20.1 | 86.1 | 0.292 |
| | Alacska-patak | 6.6 | 10 | 0.049 |
| Szuha | | 40 | 211.6 | 0.982 |
| | Tardona-patak | 18.9 | 47.2 | 0.206 |
| | Bán-patak | 23.9 | 260.3 | 0.893 |
| Galgóc-patak | | 3.1 | | |
| Zsuponyó-patak | | 7.5 | 17 | 0.094 |
| Szörnyűvölgyi-patak | | 6 | 10.3 | 0.051 |
| | Mercse-patak | 10.6 | 30.1 | 0.16 |
| | Hangony | 30.9 | 295.2 | 1.033 |
| Keleméri-patak | | 15.6 | 60.3 | 0.19 |
| Slovakia |||||
| | Rimava (Rima) | 88 | 1,368.6 | 7.912 |
| | Lúčka | 7.2 | | |
| Neporadzský potok | | 8.2 | | 0.091 |
| Konský potok | | 10 | | 0.139 |
| | Kaloša | 15.1 | 146.6 | 0.27 |
| Hubovský potok | | 9.2 | | |
| | Turiec (Turóc) | 46.2 | 370.5 | 2.072 |
| Chinča | | 9.8 | | 0.111 |
| | Gemerský potok | 3.8 | | |
| Lapša | | 9.5 | | |
| | Muráň (Murány) | 48.8 | 413.2 | 3.118 |
| Sograd' | | 8.3 | | 0.064 |
| Androvský potok | | 3.4 | | 0.167 |
| | Mlynský | | | |
| | Štítnik (Csetnek) | 32.8 | 229.6 | 1.715 |
| | Egressy potok (Egres-patak) | 4.2 | | |
| Čremošná (Csermosnya-patak) | | 29 | 142 | 0.968 |
| | Honský potok | 12.8 | 26.23 | 0.189 |
| Rožňavský potok | | 13.34 | 42.3 | 0.332 |
| Betliarsky potok | | 7.9 | | 0.124 |
| Capašsky potok | | 5.3 | | |
| Súl'ovský potok | | 14.2 | 57.66 | 0.462 |
| | Kolesárský potok | 6.2 | | |
| Dolinský potok | | | | |
| Lučica | | 4.9 | | |
| | Henckovský potok | 3 | | |
| | Pališov potok | 2.9 | | |
| | Kobeliarovský potok | 6.76 | 15.65 | 0.138 |
| | Gampel'ský potok | 3.4 | | |
| Gočovský potok | | 2.9 | | |
| Vlachovský potok | | 5.3 | | |
| Dobšinský potok (Dobsina) | | 15.5 | 57.32 | 0.578 |
| | Žoltkovský potok | 6.5 | | |
| | Potôčik | | | |
| | Mlynná | | | |
| Krokovský potok | | 1.9 | | |
| | Rovniansky potok | 5.5 | | |
| Skalný potok | | | | |
| Trsteník | | 3.5 | | |

## Etymology

The origin of the name is the subject of scholar discussions. Hungarian linguists and historians suggested the derivation from the Hungarian sojó, só folyó (salt water, river) already in the 19th century. Newer theories associate the name with sió referring to fast streams. According to Slovak linguists the name is pre-Hungarian (Slaná: salt river) and most likely not associated with the salinity but with the salt road existing already in times of Great Moravia. The supporters argue by numerous Slavic toponyms in the river basin and by local names related to soľ (salt) and Moravia like Moravce, Soľár, Solišče, Soľka, Soľník, Morava (according to this interpretation the Hungarian name is a later translation).