| Siligir | |
| Other Name: | Силигир |
| Source1 Coordinates: | 67.1122°N 113.0956°W |
| Source1 Elevation: | 218m (715feet) |
| Mouth Coordinates: | 68.3556°N 114.9378°W |
| Mouth Elevation: | 87m (285feet) |
| Subdivision Type1: | Country |
| Length: | 220km (140miles) (344km (214miles)) |
| Discharge1 Avg: | 70m3/s |
| Basin Size: | 13400km2 |
| Pushpin Map: | Russia Sakha Republic#Russia |
| Pushpin Map Caption: | Mouth location in Yakutia, Russia |
The Siligir (Russian: Силигир; Yakut: Силигир) is a river in Yakutia (Sakha Republic), Russia. It is the largest right tributary of the Olenyok with a length of 220km (140miles) — long counting the Orto-Siligir stretch of its upper course. Its drainage basin area is 13400km2.
The river flows just north of the Arctic Circle across a lonely, desolate area of Olenyoksky District devoid of settlements.[1] There are very large bitumen deposits along the Siligir basin.[2] [3]
The Siligir is formed in the Central Siberian Plateau at the confluence of the 124km (77miles) long Orto-Siligir (Орто-Силигир) and the 100km (100miles) long Usuk-Siligir (Усук-Силигир). The river flows initially northwards, bending to the NNE after a stretch, and then to the northeast.[4] Finally it bends again to the north and meets the right bank of the Olenyok 1351km (839miles) from its mouth. The confluence is downstream of Olenyok village, one of the few inhabited localities of the area.[5] The river is frozen between early October and the second half of May.[6]
The Siligir has some very large tributaries, such as the 169km (105miles) long Onnyoo-Siligir (Russian: Онньоо-Силигир; Yakut: Өнньүө Силигир) and the 128km (80miles) long Siligirkeen (Силигиркээн), both from the left.[4]
The main fish species found in the waters of the Siligir are lenok, taimen, grayling, pike and perch. In some stretches there are whitefish and nelma.[7]
