Where is ob irtysh

The Ob becomes divided into many ribbons, subject to enormous spring floods and dangerous ice flows during summer thaws. Here the river valley can at times reach 25 mi 40 km wide. Fortified wooden stockades were built at river junctions as trappers and merchants moved eastward, including such cities as Tobolsk on the Irtysh, and Salekhard on the Ob.

This latter city is one of the furthest north in all of Russia, located close to where the Urals meet the Arctic at the Gulf of Ob and where the forests meet the Arctic tundra. Later cities were founded on the upper Ob Narym and Tomsk before the push for furs moved on eastward into Siberia.

The large industrial cities of the south were built later, with the development of coal and iron ore industries, especially in the Kuznetsk Basin, and more recent pumping of oil near Surgut on the middle Ob.

The river serves as an important route for the transport of people and goods of the countries through which it flows and also houses a number of high capacity hydroelectric power stations. The Irtysh River was the site of ancient civilizations of the Mongol and Turkic peoples. One of the many famous battles fought along this river is the Battle of Irtysh River, which was fought in between the Tang dynasty and the Western Turkic Khaganate.

With the battle resulting in the defeat of the latter, it was one of the key events leading to the supremacy of the Tang over the Turks in the region for some time to come. Over the years, different dynasties have fought numerous wars with each other to establish their power in the Irtysh River basin.

Currently, however, the river is shared by the 3 countries of China, Kazakhstan and Russia. In modern times, the waters of the Irtysh River support the needs of millions living along its banks in China, Kazakhstan, and Russia. In Kazakhstan and Russia, the river serves as a significant transport route for maritime war machines, passenger ships and cargo ships during the ice-free season. In the northeastern part of the Western Siberian Lowland are drainages of the Taz and Pur, two large northern rivers that empty into Taz Bay.

The maximum known depth of Lake Teletskoye is m, and mean depth is m. The length of Lake Teletskoye is The lake is elongated and channel-shaped. Except for the southern part of the lake that is filled by silt from the Chulyshman River, and shoals in the northwestern part of the lake, throughout most of the lake the bottom drops-off rapidly from the coast.

The western border [with ecoregions and ] goes along the Ural Range down to Turgai Tableland [Turghay Ustirti], which divides the headwaters of the Igriz and Turgai [ecoregion ] from the Tobol Irtysh tributary headwaters.

The border crosses the Turgai Dolina Valley [Torghay Zhylghasy], which includes the Ubagan River Tobol tributary , and runs southward along the western slopes of the Kazakhskiy Melkosopochnik upland [Qazaqtyng Usaqshoqylyghy]. It then turns east to divide the Sarysu River basin [ecoregion ] from the Nura River system and tributaries of Lake Tengiz that belong to this ecoregion.

The border then curves to the north along the Konsuyskiy Range, which divides the Koksa River headwaters [] and Uba River headwaters []. The border reaches the southernmost extremity of Lake Teletskoye [in ].

Downstream from the confluence of the Biya and Katun rivers it flows in an undulating forest — steppe plain. Here, the width of the valley is 20 km, the floodplain width is km, the depth during the mean water period is m, and flow velocity is 0. The width of the valley increases up to km, and in the floodplain, up to km.

A large number of lakes and bayous occur within the floodplain, covered by meadows and forests. The river channel is split into an elaborate network of branches and anabranches. The depth in the mean water period is m, flow velocities are 0.

During the spring tide, flooded areas may extend km. The maximum depths are m. Flow velocities vary from 0. There, the river is split into a number of branches, the largest of which are Khamanelskaya Ob and Nadymskaya Ob the width of the latter is 30 km.

The amplitude of the water level fluctuation over most of its flow is 9—10 m. In the flood period overflows are observed, attaining tens of kilometers in width in the lower reaches. In the upper reaches, the river freezes around mid-November. It is typical that the river freezes in the lower reaches about 10 days later than the rivers contiguous with it, although it is characterized by lower amounts of water.

With the exceptionally plain nature of the terrain and, respectively, very small slopes, the river network on the whole cannot drain rapidly melting waters and rain waters. Its drainage is weak and does not spread far beyond the limits of the valley. This has contributed to the extensive marshes and swamplands covering even flat watershed areas of the taiga zone. The well-known Vasyuganskiye marshes extend for hundreds of kilometers. The peculiar nature of taiga rivers is also attributed to the plain character of the terrain.

They are characterized by very small slopes less than 0.