Siligir

{{Short description|River in Yakutia (Sakha Republic), Russia}}

{{Infobox river

| name = Siligir

| other_name = Силигир

| image = Olenyok.png

| image_caption = Olenyok basin with the Siligir in the lower part.

| source1_location = Central Siberian Plateau

| source1_coordinates = {{coord|67|06|44|N|113|05|44|E|source:wikidata-and-enwiki-cat-tree_region:RU}}

| source1_elevation = {{convert|218|m|abbr=on}}

| mouth = Olenyok

| mouth_location =

| mouth_coordinates = {{coord|68|21|20|N|114|56|16|E|source:wikidata|display=it}}

| mouth_elevation = {{convert|87|m|abbr=on}}

| progression = Olenyok→Laptev Sea

| subdivision_type1 = Country

| subdivision_name1 = Russia

| length = {{convert|220|km|mi|abbr=on}} ({{convert|344|km|mi|abbr=on}})

| discharge1_avg = {{convert|70|m3/s|abbr=on}}

| basin_size = {{convert|13400|km2|sqmi|abbr=on}}

| pushpin_map = Russia Sakha Republic#Russia

| pushpin_map_size =

| pushpin_map_caption= Mouth location in Yakutia, Russia

}}

The Siligir ({{langx|ru|Силигир}}; {{langx|sah|Силигир}}) is a river in Yakutia (Sakha Republic), Russia. It is the largest right tributary of the Olenyok with a length of {{convert|220|km|mi}} —{{convert|344|km}} long counting the Orto-Siligir stretch of its upper course. Its drainage basin area is {{convert|13400|km2|mi2}}.{{GVR|235395|Река Силигир}}

The river flows just north of the Arctic Circle across a lonely, desolate area of Olenyoksky District devoid of settlements.[https://www.booksite.ru/fulltext/1/001/008/102/075.htm Силигир] / Great Soviet Encyclopedia: in 30 vols. / Ch. ed. A.M. Prokhorov. - 3rd ed. - M. Soviet Encyclopedia, 1969-1978 There are very large bitumen deposits along the Siligir basin.[https://archives.datapages.com/data/rus_pet_geol/data/021/021003/110_pg210110.htm East Siberian Bitumen Deposits]R A French, Alan Wood, Christian R. Thauer, Helen Routledge. The Development of Siberia: People and Resources, p. 243

==Course==

The Siligir is formed in the Central Siberian Plateau at the confluence of the {{convert|124|km|mi|abbr=on}} long Orto-Siligir (Орто-Силигир) and the {{convert|100|km|mi|abbr=on}} long Usuk-Siligir (Усук-Силигир). The river flows initially northwards, bending to the NNE after a stretch, and then to the northeast.{{cite web|url=https://maps.vlasenko.net/smtm1000/q-49_50.jpg|title=Топографска карта Q-49 50; M 1:1 000 000 - Topographic USSR Chart (in Russian)|access-date=29 April 2022}} Finally it bends again to the north and meets the right bank of the Olenyok {{convert|1351|km|mi|abbr=on}} from its mouth. The confluence is downstream of Olenyok village, one of the few inhabited localities of the area.{{cite web|url=https://maps.vlasenko.net/smtm1000/r-49_50.jpg|title=Топографска карта R-49 50; M 1:1 000 000 - Topographic USSR Chart (in Russian)|access-date=29 April 2022}} The river is frozen between early October and the second half of May.[https://web.archive.org/web/20090330190139/http://www.nature.ykt.ru/RIAC/Yakutia_geogr/017.htm#%D0%A1%D0%B8%D0%BB%D0%B8%D0%B3%D0%B8%D1%80 nature.ykt.ru (Силигир)]

===Tributaries===

The Siligir has some very large tributaries, such as the {{convert|169|km|mi|abbr=on}} long Onnyoo-Siligir ({{langx|ru|Онньоо-Силигир}}; {{langx|sah|Өнньүө Силигир}}) and the {{convert|128|km|mi|abbr=on}} long Siligirkeen (Силигиркээн), both from the left.