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Wednesday, 5 December 2012

Northern Dvina River

The Northern Dvina (Russian: Се́верная Двина́, IPA: [ˈsʲevʲɪrnəjə dvʲɪˈna]) is a river in Northern Russia flowing through the Vologda Oblast and Arkhangelsk Oblast into the Dvina Bay of the White Sea. Along with the Pechora River to the east, it drains most of Northwest Russia into the Arctic Ocean. It should not be confused with Western Dvina.
The principal tributaries of the Northern Dvina are the Vychegda (right), the Vaga (left), and the Pinega (right).

Etymology

According to the Max Vasmer's Etymological Dictionary, the name of the river has been transferred from the Western Dvina River. The toponym Dvina clearly cannot stem from a Uralic language, however, its origin is unclear. Possibly it is an Indo-European word which used to mean river or stream.[2]
Western Dvina however is known originating from the Finnic name Vīna-Väinä, for passage-to-the-sea.[citation needed] This name is mentioned in the Viking sagas and the Chronicle of Nestor.
In Finnish river is known as Viena or Vienanjoki, which means slowly running river and is feminine form of Väinä, meaning same.

Physical geography

River basin

The length of the Northern Dvina is 744 kilometres (462 mi). Together with its major tributary, the Sukhona, it is 1,302 kilometres (809 mi) long – about as long as the Rhine River. The area of its basin is 357,052 square kilometres (137,859 sq mi) – about the size of the state of Montana. The river basin of the Northern Dvina include the major parts of the Vologda and the Arkhangelsk Oblasts, as well as areas in the western part of the Komi Republic and in the northern part of the Kirov Oblast, and minor areas in the north of Yaroslavl and Kostroma Oblasts. The cities of Arkhangelsk and Vologda, as well as many smaller towns, many of those of significant historical importance such as Veliky Ustyug, Totma, Solvychegodsk, and Kholmogory, are located in the river basin of the Northern Dvina.
The Northern Dvina basin is roughly T-shaped. The basin of 558 kilometres (347 mi) long Sukhona River, flowing east and joins the basin of the west-flowing Vychegda River (1,130 kilometres (700 mi) long). The combined stream flows northwest into the White Sea, which it joins near the city of Archangelsk. Looking more closely, the Sukhona flows east and meets the north-flowing Yug River at Veliky Ustyug. The combined stream, now called the Northern Dvina, flows north about 60 km and receives the west-flowing Vychegda at Kotlas and then turns northwest to flow into the White Sea. The Sukhona-Vychegda was an important east–west transportation route while the Northern Dvina-Yug was a north–south route. The upper Sukhona is now connected by the Northern Dvina Canal to the Volga–Baltic Waterway which links Petersburg to Moscow.

River course

The Sukhona River flows east, eventually north-east, joins the north-flowing Yug River at Veliky Ustyug and acquires the name 'Northern Dvina'. The P157 highway connecting Kostroma with Kotlas via Nikolsk and Veliky Ustyug. North of Veliky Ustyg, the highway runs on the left bank of the Northern Dvina. The river flows about 60 kilometres (37 mi) north crossing from the Vologda Oblast into the Arkhangelsk Oblast, where in the city of Kotlas it receives the west-flowing Vychegda River which rises in the northern Ural Mountains. Since at the confluence the length of the Vychegda is bigger than that of the Northern Dvina, the river between the source and the confluence with the Vychegda is sometimes known as the Lesser Northern Dvina (Russian: Малая Северная Двина). Shortly downstream from the confluence, the Northern Dvina is crossed by the railway connecting Konosha with Kotlas and Vorkuta.
The Northern Dvina then turns northwest and receives a number of smaller rivers like the Uftyuga River and the Nizhnyaya Toyma River, both from the northeast. Near the urban type settlement of Bereznik the Vaga River comes in from the south, as does the M8 highway which runs from Moscow through Vologda to Arkhangelsk. The Yomtsa or Yemtsa River and the P1 highway (from Kargopol) join from the southeast. The Pinega River, formerly an important river route, joins from the east. Near the mouth of the Pinega the river splits into several channels, among which is the ancient selo of Kholmogory 75 kilometres (47 mi) southeast of Arkhangelsk. The branches rejoin and pass the modern logging town of Novodvinsk. Downstream from Novodvinsk, the 900 square kilometres (350 sq mi) delta begins. In the upstream part of the delta the great port of Arkhangelsk is located which gradually replaced Kholmogory as the chief town of the region. On the southwest side of the delta is the naval base of Severodvinsk, the second largest city in the region. The delta ends in the Dvina Bay of the White Sea.
The river flows through Velikoustyugsky District of the Vologda Oblast and through Kotlassky, Krasnsoborky, Verkhnetoyemsky, Vinogradovsky, Kholmogorsky, and Primorsky Districts of the Arkhangelsk Oblast. All administrative centers of these districts are located at the banks of the Northern Dvina.

Navigation and canals

In summer the river is navigable all along and is heavily used for timber floating. The Northern Dvina Canal connects it with the Volga–Baltic Waterway. In the 19th century, a short-lived Northern Ekaterininsky Canal, now abandoned, connected the Northern Dvina basin with the Kama basin as well. In 1926—1928 a canal connecting the Pinega, one of the major tributaries of the Northern Dvina, with the Kuloy, was constructed, however, currently the canal is pretty much neglected.

History


The Northern Dvina at the city of Kotlas. The picture is taken from the railway bridge; in front, there is the highway bridge
The area was originally populated by Finno-Ugric peoples and then colonized by the Novgorod Republic. The only exception was Veliky Ustyug, which was part of Vladimir-Suzdal Principality. The rest of the Northern Dvina basin was controlled by Novgorod. Veliky Ustyug has been first mentioned in the chronicles in 1207, Shenkursk — in 1315, Solvychegodsk was founded in 14th century. In the 13th century the Novgorod merchants already reached the White Sea. The area was attractive in the first instance because of the fur trading. The main waterway from Novgorod into the Northern Dvina was along the Volga and its tributary, the Sheksna, along the Slavyanka River into Lake Nikolskoye, then the boats were taken by land to Lake Blagoveshchenskoye, from there downstream along the Porozovitsa River into Lake Kubenskoye and further to the Sukhona and the Northern Dvina.[3]
From the Northern Dvina, there were a number of ways into the basin of the Mezen (from where the merchants could get to the basin of the Pechora and the Ob). One was upstream the Vychegda and the Yarenga, and by land into the Vashka. Another one was upstream the Vychegda, the Vym, the Yelva, then by land to the Irva and to the Mezen. Two further options included going upstream the Pinega, and then by land to the Kuloy and to the Mezen, or using the Pukshenga and the Pokshenga Rivers to get to the Pinega, and then from the Yezhuga taking boats by land to the Zyryanskaya Yezhuga and the Vashka.[3] From the Vychegda, the merchants also could get directly to the river basin of the Pechora via either the Cherya and the Izhma, or the Mylva.
From 14th century, Kholmogory was the main trading harbor on the Northern Dvina, but in 17th century it lost this distinction to Arkhangelsk (even though the seat of the Kholmogory and Vaga Eparchy, from 1732 known as Kholmogory and Archangelogorod Eparchy, which had jurisdiction over all Northern Russia including the Solovetsky Monastery, was located in Kholmogory until 1762. Until 1700s, Arkhangelsk was the main trading harbour for the sea trade of Russia and Western Europe, and the Northern Dvina was the main trading route connecting the central Russia with Arkhangelsk. Peter the Great drastically changed the situation, by founding Saint-Petersburg in 1703, thus opening the way for the Baltic Sea trade, and by constructing the highway between Saint-Petersburg and Arkhangelsk via Kargopol. The river quickly lost its role as the leading trading route, which was accelerated by the construction of the railway between Vologda and Arkhangelsk between 1894 and 1897.
The Northern Dvina was scene of several battles during the Russian Civil War, many involving the Entente interventionist army as part of their North Russia Campaign. A special Northern Dvina Flotilla existed during the Civil War.
From 1950s, the Northern Dvina was heavily used for timber rafting. The passenger navigation has been largely disappeared. Only local passenger lines remain. The passenger line connecting Kotlas and Arkhangelsk has been out of operation since 2005.

Kama River

Kama (Russian: река́ Ка́ма, IPA: [ˈkamə]; Tatar Cyrillic: Чулман, Latin: Çulman; Udmurt: Кам) is a major river in Russia, the longest left tributary of the Volga and the largest one in discharge; in fact, it is larger than the Volga before junction.
It starts in Udmurtia, near Kuliga, flowing north-west on 125 miles, turn north-east near Loyno for another 125 miles, then turns south and west in Perm Krai, flowing again through Udmurtia and then through Tatarstan, where it meets the Volga.
Among the Turkic peoples, Kama was known as Chulman, and was considered the origin of the Volga.
The overall length is 1,805 km (1,122 mi). The largest tributaries to the Kama are Kosa, Vishera, Sylva, Chusovaya, Belaya, Ik, Izh, Zay, Vyatka and Myosha Rivers. The cities situated on the banks of the Kama are Solikamsk, Berezniki, Perm, Sarapul, and Naberezhnye Chelny. It is located to the west of the Ural Mountains and is a fairly well used trade route.
Kama River1.jpg
Before the advent of the railroads, the Kama was connected by important portages with the basins of the Northern Dvina and the Pechora. In the early 19th century, Northern Ekaterininsky Canal connected the upper Kama with the Vychegda River (a tributary of the Northern Dvina), but was mostly abandoned after just a few years due to low use.

Dams and reservoirs

The Kama is dammed at several locations:



Gallery


Monday, 3 December 2012

Pechora River

Geography

Pechora River, light-colored Ural Mountains and part of the Ob River
It is 1,809 km long (a little less than the Columbia River) and its basin is 322,000 square kilometers (about the same size as Finland). By mean annual discharge it ranks third in Europe, after the Volga and Danube.[3] Its discharge is about half that of the Danube and a little more than its sister, the Northern Dvina River, and is the largest of any river with no dams in its basin outside of New Guinea. West of its lower course is the Timan Ridge. East of the basin along the west flank of the Urals is the Yugyd Va National Park. Also in the basin is the Virgin Komi Forests, the largest virgin forest in Europe. In the far northeast of the basin on the Usa River is the large coal center of Vorkuta. The river was once an important transportation route, especially for those travelling to northwest Siberia. Today a railroad runs southwest from Vorkuta to Moscow.

Along the Pechora

The river rises in the Ural Mountains in the south-eastern corner of the Komi Republic. This area is part of the Pechora-Ilych Nature Reserve. On the other side of the Urals are the headwaters of the Northern Sosva River. The river flows south, then west and turns north near Yaksha which is the head of navigation for small boats. A portage led south to the Kama River basin. To the east is the upper Vychegda River, a branch of the Northern Dvina. North past Komsomolsk-na-Pechore to Ust-Ilych where the Ilych River comes in from the east. Northwest to Troitsko-Pechorsk (1359 km from the mouth), north to Vuktyl and Ust-Shchuger where the Shchugor River comes in from the east. North to Pechora town where the railway from Vorkuta crosses. North to Ust-Usa where the Usa River joins from the east (The Usa was once an important river route into Siberia.). The Pechora curves northwest, west, and west southwest. Izhma River joins from the south. West to Ust-Tsilma (425 km from the mouth) where the Pizhma River (Komi Republic) joins from the southwest and the Tsilma River joins from the west. (Before modern times people traveled up the Tsilma and portaged to the Pyoza River to reach the White Sea.) Pechora turns north. Arctic Circle; border of the Nenets Okrug, Pustozyorsk; Naryan-Mar, the Nenets capital and a port at the head of the Pechora delta, Pechora Bay; Pechora Sea; Barents Sea.

Hydrology

The monthly averaged discharge values of the river have been registered since 1981 to 1993 years in village Oksino, located 141 km (88 mi) upstream from the mouth, they presented below as a diagram (metric units, m³/sec).[2]

Canal projects to the Kama River

Before the arrival of the railroad to the Pechora, an important way of travel to the region was via a portage road, from Cherdyn in the Kama River basin to Yaksha on the Pechora.
A project for a Pechora-Kama Canal along the same general route was widely discussed in the 1960s through 1980s, this time not as much for transportation, but for the diversion of some of the water of the Pechora to the Kama, as part of a grand Northern river reversal scheme. However, no construction work was carried out on the route of the proposed canal, other than a triple nuclear explosion in 1971, which excavated a crater over 600 m long.

Don River (Russia)

The Don River (Russian: Дон; IPA: [don]) is one of the major rivers of Russia. It rises in the town of Novomoskovsk 60 kilometres southeast from Tula, southeast of Moscow, and flows for a distance of about 1,950 kilometres (1,220 mi) to the Sea of Azov.
From its source, the river first flows southeast to Voronezh, then southwest to its mouth. The main city on the river is Rostov on Don. Its main tributary is the Donets.

History

Paleolithic archaeological layers at Kostenki reveal human histories around 40,000 years ago. The lithic industry at that time developed the technology to drill stone.[citation needed]
In antiquity, the river was viewed as the border between Europe and Asia by some ancient Greek geographers.[1] In the Book of Jubilees, it is mentioned as being part of the border, beginning with its easternmost point up to its mouth, between the allotments of sons of Noah, that of Japheth to the north and that of Shem to the south. During the times of the old Scythians, it was known in Greek as the Tanaïs, and has been a major trading route ever since.
Tanais appears in ancient Greek sources as both the name of the river and of a city on it, situated in the Maeotian marshes. The name derives from Scythian (East Iranian) Dānu "river",[citation needed] akin to Ossetic don "river", and Pashto dand (ډنډ) or dun (depending on dialect) "pond, lake".
The Khazar fortress of Sarkel used to dominate this point in the Middle Ages. This part of the river saw heavy fighting during Operation Uranus, one of the turning points of the Second World War.[citation needed]
The Don Cossacks, who settled the fertile valley of the river in the 16th and 17th centuries, were named for the river. In modern literature, the Don is often featured in the works of Mikhail Aleksandrovich Sholokhov, a writer from the stanitsa of Veshenskaya.

Dams and canals

Don River near village Kalininsky in Rostov Oblast (photo 2002).
At its easternmost point, the Don comes near the Volga, and the Volga-Don Canal (length ca. 105 kilometres (65 mi)), connecting both rivers, is a major waterway. The water level of the Don in this area is raised by the Tsimlyansk Dam, forming the Tsimlyansk Reservoir.
For the next 130 km below the Tsimlyansk Dam, the sufficient water depth in the Don River is maintained by the sequence of three dam-and-ship-lock complexes: the Nikolayevsky Ship Lock (Николаевский гидроузел), Konstantinovsk Ship Lock (Константиновский гидроузел), and the best known of the three, the Kochetovsky Ship Lock (Кочетовский гидроузел). The Kochetovsky Lock, built in 1914-1919 and doubled in 2004-2008, is located 7.5 km below the fall of the Seversky Donets into the Don, and 131 km upstream of Rostov-na-Donu, the Kochetovsky Ship Lock (Кочетовский гидроузел) (47°34′07″N 40°51′10″E) is located. This facility, with its dam, maintains sufficient water level both in its section of the Don and in the lowermost stretch of the Seversky Donets. This is the last lock on the Don; below Kochetovsky lock, the sufficient depth of the navigation waterway is maintained by dredging.[2]


Sunday, 2 December 2012

Bug River

The Bug River (Polish: Bug [buk] ( listen); Ukrainian: Західний Буг, Zakhidnyy Buh or Western Bug; Belarusian: Захо́дні Буг, Zakhodni Buh; Russian: Западный Буг, Zapadnyy Bug) is a left tributary of the Narew river which flows from central Ukraine to the west, passing along the Ukraine-Polish and Polish-Belarusian border and into Poland, where it empties into the Narew river near Serock. The part between the lake and the Vistula River is sometimes referred to as Bugo-Narew. The Vistula River drains into the Baltic Sea.
The Bug is 830 km long[1] (587 km in Poland)[citation needed] and is the 4th longest Polish river. The basin area is 39,420 km² (19,284 km² in Poland). It is connected with the Dnieper river by the Dnieper-Bug Canal.
Traditionally the Bug was also often considered the ethnographical border between Orthodox and Catholic peoples. The Bug was the dividing line between German and Russian forces following the invasion of Poland in the Second World War.

Tributaries

Allegory of the Western Bug River, a statue on the terrace of the Palace on the Island in Łazienki Królewskie, Warsaw
Poltva, Sołokija, Bukowa, Huczwa, Uherka, Włodawka, Krzna, Liwiec, Ług, Mukhavets, Leśna, Nurzec, Brok, Warenzhanka

Photo gallery


Saturday, 1 December 2012

Dnieper River

The Dnieper River /ˈnpər/ is one of the major rivers of Europe (fourth by length) that flows from Russia, through Belarus and Ukraine, to the Black Sea. The total length is 2,285 kilometres (1,420 mi) and has a drainage basin of 504,000 square kilometres (195,000 sq mi). The river is noted for its dams and hydroelectric stations. The Dnieper is an important navigable waterway for the economy of Ukraine and is connected via the Dnieper-Bug Canal to other waterways in Europe.
In antiquity, the river was known to the Greeks as the Borysthenes and was part of the Amber Road. Arheimar, a capital of the Goths, was located on the Dnieper, according to the Hervarar saga.

Etymology


Human reprisentation of the Dnepr river (known as Borysthenes) on an Ancient Greek coin of Pontic Olbia, 4-3rd century BC.
The name Dnieper is derived from Iranic Sarmatian Dānu apara "the river on the far side".[1] (By contrast, the Dniester derives from "the close river".)
In the three countries through which it flows it has essentially the same name, albeit pronounced differently:

The Dnieper River in Kherson, Ukraine.

The Dnieper River in Kremenchuk, Ukraine.
The river is mentioned by the Ancient Greek historian Herodotus in the 5th century BC as Borysthenes (Βορυσθένης), as well as by Strabo; this name is Scythian (cf. Iranian *varu-stāna) and translates as "wide land", referring most likely to the Ukrainian steppe.[citation needed] The late Greek and Roman authors called it Δάναπρις - Danapris and Danaper respectively - (dana in Old Persian meant "river"); The name Dnieper probably derives from that Greek word.[citation needed] Its Old East Slavic name used at the time of Kievan Rus' was Slavuta or Slavutych, the Huns called it Var,[2] and Bulgars - Buri-Chai.[citation needed] The name in Crimean Tatar: Özü.[3]

Geography

The total length of the river is 2,285 kilometres (1,420 mi), of which 485 km (301 mi) are within Russia, 595 km (370 mi) are within Belarus, and 1,095 km (680 mi) are within Ukraine. Its basin covers 504,000 square kilometres (195,000 sq mi), of which 289,000 km2 (112,000 sq mi) are within Ukraine.[4]
The source of the Dnieper is the turf swamps of the Valdai Hills in central Russia, at an elevation of 220 m (720 ft).[4] For 115 km (71 mi) of its length, it serves as the border between Belarus and Ukraine. It is connected with the Bug River by the Dnieper–Bug Canal. Its estuary, or liman, used to be defended by the strong fortress of Ochakiv.[citation needed]

Tributaries of the Dnieper

The Dnieper has many tributaries. The main ones, in orographic sequence, are:

Dnieper basin showing peoples in the ninth century
Many small direct tributaries also exist, such as, in the Kiev area, the Syrets (right bank) in the north of the city, the historically significant Lybid (right bank) passing west of the centre, and the Borshagovka (right bank) to the south.

Fauna

The river is part of the Quagga mussel's native range.[citation needed] The mussel has been accidentally introduced around the world where it has become an invasive species.[citation needed]

Reservoirs and hydroelectric power

The river is noted for its dams and hydroelectric stations.
The most noted was the Dnieper Hydroelectric Station or (DniproHES) near Zaporizhia, built in 1927-1932 with an output of 558 MW.[citation needed] It was destroyed during the Second World War, and rebuilt in 1948 with an output of 750 MW.[citation needed]
The others are: Kremenchuk (1954–60), Kiev (1960–64), Dniprodzerzhynsk (1956–64), Kaniv (1963–75).[citation needed]
Those dams that used to generate hydroelectric power of ten percent of Ukraine's total electricity, form water reservoirs.
The reservoirs are Kiev (922 km2 or 356 sq mi), Kaniv (675 km2 or 261 sq mi), Kremenchuk (2,250 km2 or 870 sq mi), Dniprodzerzhynsk (567 km2 or 219 sq mi), Dnipro (420 km2 or 160 sq mi), and Kakhovka (2,155 km2 or 832 sq mi).[citation needed]

Cities and towns on the Dnieper


Satellite image of the Dnieper and its tributaries.
Cities and towns located on the Dnieper are listed in order from the river's source (in Russia) to its mouth (in Ukraine):
Arheimar, a capital of the Goths, was located on the Dnieper, according to the Hervarar saga.[citation needed]

Navigation

The Dnieper is important for the transport and economy of Ukraine[citation needed]: its reservoirs have large ship locks, allowing vessels of up to 270 by 18 metres (890 ft × 59 ft) to access as far as the port of Kiev and thus create an important transport corridor.[citation needed] The river is used by passenger vessels as well. Inland cruises on the rivers Danube and Dnieper have been a growing market in recent decades.
Upstream from Kiev, the Dnieper receives the water of the Pripyat River. This navigable river connects to the Dnieper-Bug canal, the link with the Bug River. Historically, a connection with the Western European waterways was possible, but a weir without a ship lock near the town of Brest has interrupted this international waterway. Poor political relations between Western Europe and Belarus mean there is little likelihood of re-opening this waterway in the near future.[5]
Navigation is interrupted each year by freezing in winter, and severe winter storms.

Popular culture

Ural River

The Ural (Russian: Урал, pronounced [uˈrɑɫ]) or Jayıq/Zhayyq (Bashkir: Яйыҡ, Kazakh: Жайық, pronounced [ʒɑjə́q]), known as Yaik (Russian: Яик) before 1775, is a river flowing through Russia and Kazakhstan. It arises in the southern Ural Mountains and ends at the Caspian Sea. Its total length is 1,511 mi (2,428 km) making it the third longest river in Europe after the Volga and the Danube. Along with the Volga, the Ural River is one of the major rivers feeding the Caspian Sea.
The Ural River rises nearby the Mount Kruglayain in the Ural Mountains, flows south parallel and west of the north-flowing Tobol River, through Magnitogorsk, and around the southern end of the Urals, through Orsk where it turns west for about 300 km, to Orenburg, when the Sakmara River joins. From Orenburg it continues west, passing into Kazakhstan, then turning south again at Oral, and meandering through a broad flat plain until it reaches the Caspian a few miles below Atyrau, where it forms a fine digitate delta at (46°53′N 51°37′E).[1]

Geography

The Ural River as seen from a plane between Uralsk and Atyrau, Kazakhstan
The river begins at the slopes of the Kruglaya Mountain[2] of the Uraltau mountain ridge in South Ural, on the territory of the Uchalinsky District of Bashkortostan. There it has an average width of 60–80 m and flows as a typical mountain river. It then falls into the Yaik Swamp and after exiting it widens up to 5 km. Below Verkhneuralsk, its flow is characteristic of a flatland river; there it enters Chelyabinsk and Orenburg Oblasts. From Magnitogorsk to Orsk its banks are steep and rocky and the bottom has many rifts. After Orsk, the river abruptly turns west and flows through a 45 km long canyon in the Guberlinsk Mountains. After Uralsk, it flows from north to south, through the territory of West Kazakhstan Province and Atyrau Province of Kazakhstan. There, the river widens and has many lakes and ducts. Near the mouth, it splits into the Yaik and Zolotoy distributaries[3][4] and forms vast wetlands. The Yaik distributary is shallow, with almost no trees on the shores, and is rich in fish; whereas Zolotoy is deeper and is navigable.[5] Ural River has a spectacular tree-like (or “digitate”) shape of the delta (see image). This type of delta forms naturally in the slow rivers which bring much sediments and flow into a quiet sea.[1] In the delta, 13.5 km from the mouth of the Zolotoy distributary lies Shalyga Island having the length of 2.5 km, heights of 1–2 and maximum widths of 0.3 km.[6]
The tributaries, in order going upstream, are Kushum, Derkul, Chagan, Irtek, Utva, Ilek (major, left), Bolshaya Chobda, Kindel, Sakmara (major, right), Salmys, Or (major, left) and Suunduk.[4]
The entire length of the Ural River is considered the Europe-Asia boundary by most authoritative sources.[7][8][9] Rarely, the smaller, shorter Emba River is claimed as the continental boundary,[10][11] but that pushes "Europe" much further into "Central Asian" Kazakhstan. The Ural River bridge is Orenburg is even labeled with permanent monuments carved with the word "Europe" on one side, "Asia" on the other.[12] Regardless, Kazazkstan has some European territory and is at times included in European political and sports organizations [13][14]

Hydrography

The "bird's-foot" ("digitate") delta of the Ural in the Caspian Sea.[1]
The river is mostly fed by melting snow (60–70%); the contribution of precipitation is relatively minor.[15] Most of its annual discharge (65%) occurs during the spring floods, which occur in March–April near the mouth and in late April–June upstream; 30% drain during the summer-autumn and 5% in winter. During the floods, the river widens to above 10 km near Uralsk and to several tens kilometers near the mouth. Water level is highest in later April upstream and in May downstream. Its fluctuation is 3–4 m in the upper stream, 9–10 m in the middle of the river and about 3 m in the delta. The average water discharge is 104 m3/s near Orenburg, 400 m3/s at the Kushum village (76.5 km from the mouth); maximum discharge is 14,000 m3/s and the lowest is 1.62 m3/s. Average turbidity is 280 g/m3 at Orenburg and 290 g/m3 near Kushum 290. The river freezes at the source in early November and in the middle and lower reaches in late November. It opens in the lower reaches in late March and in early April in the upper reaches. The ice drift is relatively short.[2][3][4]
The average depth is 1–1.5 m near the source, it increases in the middle reaches and especially near the mouth. The density of underwater vegetation also increases from the south to the mouth, so as the richness of the fauna. The bottom in the upper stream is rocky, with pebble and sand; it changes to silt-sand and occasionally clay downstream. The basin is asymmetrical – its left side from the river is 2.1 times larger in area than the right side; however, the right side is more important for feeding the river. The density of the tributaries is 0.29 km/km2 in the right and 0.19 km/km2 in the left side of the basin. The right-side tributaries are typical mountain rivers whereas the left-side tributaries have flatland character. About 200 km from the mouth there is a dangerous spot for shipping called Kruglovskaya prorva (Russian: Кругловская прорва meaning Kruglovsk abyss). Here the river narrows and creates a strong vortex over a deep pit. The climate is continental with frequent and strong winds. Typical annual precipitation is 530 mm.[5][15]

Fauna

Eurasian Spoonbill
The wetlands at and near the delta of the Ural River are especially important to migrating birds as an important stop-over along the Asian flyway.[1] They host many endemic and endangered species, such as Great White Pelican, Dalmatian Pelican, Pygmy Cormorant, Cattle Egret, Little Egret, Greater Flamingo, White-headed Duck, Ferruginous Duck, Eurasian Spoonbill, Glossy Ibis, Houbara Bustard, Great Black-headed Gull, Slender-billed Gull, Squacco Heron, Common Crane, Demoiselle Crane, Slender-billed Curlew, Black Stork, Red-breasted Goose, Lesser White-fronted Goose, Lesser Kestrel, Whooper Swan, Tundra Swan, Osprey, Pallid Harrier, Short-toed Eagle and many others. The Pygmy Cormorant was observed sporadically before 1999 and more regularly after that. Cattle Egret is observed since 1990 between April and September (as most other migratory birds in this area), with the total population of several dozen couples. It feeds on frogs, mollusks and small fish.[16] Upstream, there are more of the stationary bird species, such as grouse, wild pigeon and partridge.[5]
Ural River is also important for many fish species of the Caspian Sea which visit its delta and migrate upstream for spawning. In the lower reaches of the river there are 47 species from 13 families. The family Cyprinidae account for 40%, sturgeon and herring make up 11%, perch and herring 9% and salmon 4.4%. The main commercial species are sturgeon, roach, bream, carp, perch, carp, asp catfish. The rare species include Caspian salmon, sterlet, white salmon and kutum.
In the delta of the river and nearby regions live about 48 animal species belonging to 7 orders; most common are rodents (21 species) and predators (12). Among them, Bobrinski's Serotine and Marbled Polecat are endemic. Key species are Raccoon Dog, muskrat (appeared recently), European Hare, house mouse, brown rat, wild boar. Wild boars had a density of 1.2–2.5 per hectare in 2000 and are hunted commercially. Others include elk, fox, wolf, Dwarf Fat-tailed Jerboa, Great Gerbil, Northern Mole Vole and Saiga Antelope.[5][16]
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Marbled Polecat Sturgeon

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The reptiles are represented by bog turtles, common water snakes, rat snakes and Sand Lizard. Bog turtles are found in all waters. Common water snakes live on the banks of canals. Rat snakes and Sand Lizard are few and inhabit relatively high areas of land. Two more reptiles, Caspian whipsnake and Coluber spinalis, are extremely rare. Among amphibians common are lake frog and green frog.[16]
With estimated 5–10 thousand species, insects exceed all other animals of the region by diversity and biomass. Terrestrial and aquatic insects make up a significant proportion of the diet of birds. Many species are parasitic on birds and transmit infection. Other dominating inhabitants of the river are protozoa, rotifers, Cladocera and copepods. Mollusks are mostly represented by gastropods and bivalves.[16]

Industry

Water from the upper reaches of the Ural River is used to supply the prominent Magnitogorsk (Magnitogorsk Iron and Steel Works, built in the early 1930s) and Orsk-Khalilovsk metallurgical plants, and the low reaches are used for irrigation. Two reservoirs were created near Magnitogorsk, and there is a hydroelectric plant near the village of Iriklinskaya with the corresponding reservoir. Below Uralsk, there is another reservoir and the Kushumsky channel. The river is navigated up to Uralsk and there is a port in Atyrau.[2][17] Fishery is well developed; the commercial fish species include sturgeon, perch, herring, bream, carp and catfish.[4] The delta of Ural River accounts for about half of the fish catchment in Kazakhstan.[16] Also widespread is agriculture, especially growth of melons and watermelons. The city of Atyrau is a major oil producing center of Kazakhstan.[5]

Etymology

Until 1775, the river was called Yaik and was labeled as Jajykon on the map by Ptolemy from the 2nd century AD.[18] This name has a Turks origin and is currently official in Kazakhstan and in the Bashkir language. In the later European texts it is sometimes mentioned as Rhymnus fluvius[19] and in the Russian chronicle of 1140 as Yaik.[20] The river was renamed in Russian language in 1775, as a result of the motion from Catherine II of Russia – its name remained unchanged in the Bashkir and Kazakh languages.

History

Bagrenye on the Ural River. Drawing by N. F. Savichev (19th century)
In the 10–16th centuries, the city of Saray-Jük (or Saraichik, meaning "small Sarai") on the Ural River (now in Atyrau Province of Kazakhstan) was an important trade center on the Silk Road. In 13th century, it became a stronghold of the Golden Horde. It was destroyed in 1395 by the army of Timur but then rebuilt to become the capital of Nogai Horde in the 15–16th centuries. It was finally reduced to a village in 1580 by the Ural Cossacks.[5][21]
The tip of an old pike pole
After the Russian conquest of the Ural basin in the late 16th century, the shores of the Ural became home to the Yaik Cossacks. One of their main activities was fishing for the sturgeon and related fishes (including the true sturgeon, starry sturgeon, and beluga) in the Ural River and the Caspian. A great variety of fishing techniques existed; the most famous of them was bagrenye (Russian: багренье, from bagor Russian: багор, meaning pike pole): spearing hibernating sturgeons in their underwater lairs in mid-winter. The bagrenye was allowed only on one day of the year. On the appointed day, a large number of Cossacks with pike poles were gathering on the shore; after a signal was given, they rushed on the ice, broke it with their poles, and speared and pulled the fish. Another fishing technique was constructing a weir, known as the uchug (учуг) across the river, to catch fish going upstream to spawn. Until 1918, an uchug was set up in the summer and autumn near Uralsk, so that the fish would not go upstream beyond the Cossacks land. While the uchug weirs were also known in the Volga Delta, the bagrenye was thought to be a uniquely Ural technique.[22][23]
The Ural Cossacks (known originally as the Yaik Cossacks) resented the attempts by the central government to impose rules and regulations on them, and on occasions rose in rebellions. The largest rebellion, the Pugachev's Rebellion of 1773–1775, involved not only the Ural, but much of south-eastern Russia, and resulted in a loss of the government control there. After its suppression, Empress Catherine issued a decree of 15 January 1775 to rename most of the places involved in the revolt, in order to erase the memory of it. Thus the Yaik River and the city of Yaitsk were renamed to the Ural River and Uralsk, respectively, and the Yaik Cossacks became the Ural Cossacks.[24]