Ob
The Ob is a major river in western Siberia, Russia, formed by the confluence of the Biya and Katun rivers and flowing north into the Gulf of Ob.
Biya River: A river in the Altai Republic of Russia that joins the Katun to form the Ob. It is one of the two headwater rivers that meet to form the Ob.
Spring snowmelt: The seasonal release of water as accumulated snow melts in spring. Snowmelt drives the Ob’s pronounced spring and early-summer high water.
Inland waterway: A navigable river, lake, or canal used for transportation within a land region. The Ob and connected rivers form an extensive shipping route across western Siberia.
West Siberian petroleum basin: A vast sedimentary basin in western Siberia containing major oil and natural gas reserves. Its development brought extensive extraction and infrastructure into the Ob basin.
Barnaul: A city in southwestern Siberia, Russia, on the Ob River. Barnaul stands where the river becomes a major regional transport and urban corridor.
Katun River: A river rising on Mount Belukha in the Altai Mountains and joining the Biya to form the Ob. Its confluence with the Biya marks the Ob’s beginning.
River ice: Ice that forms, moves, or breaks up within a river channel. Freeze-up and breakup govern navigation and produce ice-jam flood risks along the Ob.
Ob-Irtysh waterway: A connected river transport network formed by the Ob, Irtysh, and their navigable tributaries. It links inland settlements and ports across a large part of the basin.
Oil spill: The release of liquid petroleum into the environment, especially water or land. Pipeline leaks and extraction can contaminate tributaries and wetlands feeding the Ob.
Novosibirsk: The largest city in Siberia, Russia, situated on the Ob River. The city’s growth and transport links are closely tied to crossing the Ob.