| Seym | |
|---|---|
&sq=&lang=&file=File:Sejm_in_bupel.jpg) Seym at Bupel in Kursk Oblast | |
 | |
| Native name | Сейм |
| Location | |
| Regions |  Russia: Belgorod, Kursk Ukraine: Sumy, Chernihiv |
| Physical characteristics | |
| Source | near Morozovo |
| • coordinates | 51°09′50″N 37°13′58″E / 51.16389°N 37.23278°E |
| Mouth | Desna |
• coordinates | 51°27′34″N 32°33′50″E / 51.45944°N 32.56389°E |
| Length | 748 km (465 mi) |
| Basin size | 27,500 km2 (10,600 sq mi) |
| Discharge | |
| • average | 99.6 m³/s[1] |
| Basin features | |
| Progression | Desna→ Dnieper→ Dnieper–Bug estuary→ Black Sea |
| Tributaries | |
| • left | Reut, Vyr |
| • right | Tuskar, Svapa, Kleven |
 | |
The Seym or Seim (Russian: Сейм; Ukrainian: Сейм) is a river that flows westward in Russia and Ukraine. It is 748 kilometres (465 mi) long (250 km within Ukraine) and its basin area about 27,500 square kilometres (10,600 sq mi). It is the largest tributary of the Desna.[2][3][1][4]
Places on the river include Kursk, Kurchatov,[citation needed] Rylsk, Glushkovo,[5] Putyvl, Baturyn, and the junction with the Desna, which continues west and south past Chernihiv to Kyiv.[citation needed]
In September 2024, during the Russian invasion of Ukraine, Ukrainian officials accused Russia of polluting the river by dumping sewage from a sugar factory in Tyotkino, Kursk Oblast, resulting in environmental damages estimated at about Hr 186 million ($4.5 million) in Chernihiv Oblast that included a decrease in oxygen levels and fish kills downstream.[6]
- ^ a b "Сейм (река)" (in Russian). Большая Советская Энциклопедия. Retrieved 2019-05-05.
- ^ Izsák Tibor (2007). Ukrajna természeti földrajza (PDF) (in Hungarian). II. Rákóczi Ferenc Kárpátaljai Magyar Főiskola. p. 95. Archived from the original (pdf) on 2013-02-28. Retrieved 2019-05-05.
- ^ "NÉVJEGYZÉK-SZÓTÁR az UKRAJNA TERMÉSZETI FÖLDRAJZA tantárgyhoz" (PDF) (in Hungarian). II. Rákóczi Ferenc Kárpátaljai Magyar Főiskola. Archived from the original (pdf) on 2019-04-04. Retrieved 2019-05-05.
- ^ "Seim River". Encyclopedia of Ukraine. Retrieved 2019-05-05.
- ^ "Ukraine 'destroys bridge' in Russia's Kursk region". Canberra Times. 16 August 2024.
- ^ "Ukrainian river polluted by factory sewage in Kursk Oblast, PM says". The Kyiv Independent. 10 September 2024.