Select a river, find its source and determine its absolute height. Establish in which direction and where the river

Select a river, find its source and determine its absolute height. Establish in which direction and where the river carries its waters, where and at what height its mouth is. Calculate the height difference that the river overcomes on the way from source to mouth. Name the right and left tributaries of the river. Establish on which plain the main part of the river basin is located and where the watersheds with the basins of neighboring rivers lie.

River Ob. The source is the Biya and Katun rivers from Altai. The absolute height is 160 meters.
The Ob flows into the Ob Bay. Ob mouth mark – 0 meters
164 – 0 = 164 m – the fall of the river.
Left – Sandy. Anui. Charysh. Alei, Barnaulka. Kismala, Shegarka. Tea. Parabel. Vasyugan. Big Yugan. Northern Sosva. Pike; Right – Chumysh. Berd. Inya. Tom. Chulym. Ket. Tym. Kiev Yogan. Wah. Vatinsky Egan. Tromyegan. Pim. Lyamin. Kazym. Poluy But the main tributary of the Irtysh
“The river basin of the Ob River is the entire territory of the West Siberian Plain, the watersheds in the west of the Ural Mountains, in the south of Altai in the east of the Central Siberian Plateau.