Lake Baikal and the rivers flowing into it. Large rivers flowing into Baikal. Unique fresh water tank

Security measures

During the 20th century, some efforts were made to preserve Baikal: the fight against poaching, illegal logging, laws were adopted to protect the Baikal Territory. Reserves and national parks appeared in the Baikal region. In 1916, the first Barguzinsky Reserve was created. To the best of their ability, scientific research was carried out to protect the Baikal nature.

The turning point in the conservation of the unique lake occurred when on December 5, 1996 it received the status of a UNESCO World Heritage Site. Obligations were imposed on Russia to preserve the unique ecosystem. Currently, a lot of work is being done to protect the Baikal nature:

• About 97 organizations deal with the problems of Baikal, 400 dissertations have been written on the topic of protecting the lake;
• 3 institutes are responsible for monitoring the state of Lake Baikal;
• numerous environmental societies and environmental organizations have joined in the most important work to protect a unique corner of nature;
• in 2012, the federal program "Protection of Lake Baikal and socio-economic development of the Baikal natural territory for 2012-2020" was created.

The unique ecosystem of Baikal, the richest sources of resources of the Baikal flora and fauna, the beauty of its vast expanses is vital to preserve and protect.

When traveling around Lake Baikal in a kayak, the last thing you think about is that now you have 20% of the world's purest fresh water reserves under you...

On the old Circum-Baikal Railway

This section provides basic information about the lake, and links to the pages of the Magic of Baikal, where you can get more detailed information. In the process of collecting information, I encountered the fact that data from different sources diverge, sometimes significantly. For example, there is still no generally accepted opinion regarding the number of islands on Baikal, the number of rivers flowing into the lake, etc. The origin of the names of capes, islands, bays and other objects is often a mystery shrouded in darkness. I tried to take information from reliable sources and point out the discrepancies and their reasons.

Geography of Lake Baikal

Lake Baikal is located in the south of Eastern Siberia. In the form of a crescent being born, Baikal stretched from southwest to northeast between 55°47" and 51°28" north latitude and 103°43" and 109°58" east longitude. The length of the lake is 636 km, the maximum width in the central part is 81 km, the minimum width opposite the Selenga delta is 27 km (between capes Goly on the western shore of Baikal and Sredny on the eastern shore). Baikal is located at an altitude of 455 m above sea level. The length of the coastline is about 1850 km (excluding part of the coast north of Yarki Island). More than half of the lake's coastline is included in the territory of nature reserves, sanctuaries and national parks.

The area of ​​the water mirror, determined at the water's edge of 454 m above sea level, is 31,470 square kilometers.

336 permanent rivers and streams flow into Baikal, while half of the water entering the lake comes from the Selenga. The only river that flows out of Baikal is the Angara. However, the question of the number of rivers flowing into Baikal is rather controversial, most likely there are less than 336 of them. There is no doubt that Baikal is the deepest lake in the world, the closest contender for this title, the African Lake Tanganyika, lags behind by as much as 200 meters. There are 30 islands on Baikal, although, as mentioned above, there is no unanimity on this issue. The largest is Olkhon Island.

Depth of Baikal

The maximum depth of the lake is 1637 m, the average depth is 730 m. Sometimes in the literature there is a statement that the maximum depth of Baikal is 1642 m. Which value is correct? The answer to this question is somewhat paradoxical - both are correct. The point is that the measurement error for such depths is about 2%; 30 meters. Therefore, it is correct to say that the greatest depth of Baikal is 1640 m, but do not forget about a possible error of several tens of meters.

Age of Lake Baikal

The age of the lake is usually given in the literature as 20-25 million years. In fact, the question of the age of Baikal should be considered open, since the use of various methods for determining the age gives values ​​from 20-30 million to several tens of thousands of years. Apparently, the first estimate is closer to the truth - Baikal is indeed a very ancient lake. If we assume that the age of Baikal is indeed several tens of millions of years, then this is the oldest lake on Earth.

Baikal is a freshwater lake in the south of Eastern Siberia, it stretches from 53 to 56 ° N latitude. and from 104 to 109°30’ E Its length is 636 km, and the coastline is 2100 km. The width of the lake varies from 25 to 79 km. The total area of ​​the lake (mirror area) is 31,500 sq. km.

Baikal is the deepest lake in the world (1620 m). It contains the largest fresh water reserves on earth - 23 thousand cubic kilometers, which is 1/10 of the world's fresh water reserves. A complete change of such a huge amount of water in Baikal takes 332 years.

This is one of the oldest lakes, its age is 15-20 million years.

336 rivers flow into the lake, including the Selenga, Barguzin, Upper Angara, and only one Angara flows out. Baikal has 27 islands, the largest of which is Olkhon. The lake freezes in January, opens in May.

Baikal lies in a deep tectonic depression and is surrounded by taiga-covered mountain ranges; the area around the lake has a complex, deeply dissected relief. Near Baikal, the band of mountains expands noticeably. The mountain ranges here stretch parallel to one another in the direction from the northwest to the southeast and are separated by hollow-shaped depressions, along the bottom of which rivers flow and in some places there are lakes. The height of most of the ridges of Transbaikalia rarely exceeds 1300 - 1800, but the highest ridges reach large values. For example, xr. Khamar-Daban (Sokhor peak) - 2304 m, and the Barguzinsky ridge. about 3000 m.

Tectonic movements continue here even now. This is evidenced by frequent earthquakes in the region of the basin, outcrops of hot springs, and, finally, subsidence of significant sections of the coast.

The waters of Baikal have a blue-green color, are distinguished by exceptional purity and transparency, often even greater than in the ocean: you can clearly see stones lying at a depth of 10-15 m and thickets of greenish algae, and a white disk lowered into the water is visible at a depth of 40 m.
Baikal lies in the temperate zone.

Geography of Lake Baikal.

Lake Baikal is located in the south of Eastern Siberia. In the form of a crescent being born, Baikal stretched from southwest to northeast between 55°47′ and 51°28′ north latitude and 103°43′ and 109°58′ east longitude. The length of the lake is 636 km, the maximum width in the central part is 81 km, the minimum width opposite the Selenga delta is 27 km. Baikal is located at an altitude of 455 m above sea level. The length of the coastline is about 2000 km. The area of ​​the water mirror, determined at the water's edge of 454 m above sea level, is 31,470 square kilometers. The maximum depth of the lake is 1637 m, the average depth is 730 m. 336 permanent rivers and streams flow into Baikal, while half of the water entering the lake comes from the Selenga. The only river that flows out of Baikal is the Angara. However, the question of the number of rivers flowing into Baikal is rather controversial, most likely there are fewer than 336. There is no doubt that Baikal is the deepest lake in the world, the closest contender for this title, the African Lake Tanganyika, lags behind by as much as 200 meters. There are 22 islands on Baikal, although, as mentioned above, there is no unanimity on this issue. The largest island is Olkhon.

Age of Lake Baikal.

The age of the lake is usually given in the literature as 20-25 million years. In fact, the question of the age of Baikal should be considered open, since the use of various methods for determining the age gives values ​​from 20-30 million to several tens of thousands of years. Apparently, the first estimate is closer to the truth - Baikal is indeed a very ancient lake.
It is believed that Baikal arose as a result of the action of tectonic forces. Tectonic processes are still going on, which is manifested in the increased seismicity of the Baikal region. If we assume that the age of Baikal is indeed several tens of millions of years, then this is the oldest lake on Earth.

Origin of name.

Numerous scientific studies have been devoted to the problem of the origin of the word "Baikal", which indicates a lack of clarity in this matter. There are about a dozen possible explanations for the origin of the name. Among them, the most probable is the version of the origin of the name of the lake from the Turkic-speaking Bai-Kul - a rich lake. Of the other versions, two more can be noted: from the Mongolian Baigal - a rich fire and Baigal Dalai - a large lake. The peoples who lived on the shores of the lake called Baikal in their own way. Evenks, for example, - Lamu, Buryats - Baigal-Nuur, even the Chinese had a name for Baikal - Beihai - the North Sea.

The Evenki name Lamu - the Sea was used for several years by the first Russian explorers in the 17th century, then they switched to the Buryat Baigal, slightly softening the letter "g" by phonetic replacement. Quite often, Baikal is called the sea, simply out of respect, for its violent temper, for the fact that the far opposite shore is often hidden somewhere in the haze ... At the same time, the Small Sea and the Big Sea are distinguished. The Small Sea is what is located between the northern coast of Olkhon and the mainland, everything else is the Big Sea.

Baikal water.

Baikal water is unique and amazing, like Baikal itself. It is unusually transparent, pure and saturated with oxygen. In not so ancient times, it was considered healing, with its help, diseases were treated. In spring, the transparency of Baikal water, measured using the Secchi disk (a white disk 30 cm in diameter), is 40 m (for comparison, in the Sargasso Sea, which is considered the standard of transparency, this value is 65 m). Later, when a massive algae bloom begins, the transparency of the water decreases, but in calm weather, the bottom can be seen from a boat at a fairly decent depth. Such a high transparency is due to the fact that Baikal water, due to the activity of living organisms that live in it, is very weakly mineralized and close to distilled. The volume of water in Baikal is about 23 thousand cubic kilometers, which is 20% of the world's fresh water reserves.

Climate.

The climate in Eastern Siberia is sharply continental, but the huge mass of water contained in Baikal and its mountainous surroundings create an unusual microclimate. Baikal works like a big thermal stabilizer - in winter it is warmer in Baikal, and in summer a little cooler than, for example, in Irkutsk, located at a distance of 60 km from the lake. The temperature difference is usually around 10 degrees. A significant contribution to this effect is made by forests growing on almost the entire coast of Lake Baikal.

The influence of Lake Baikal is not limited to the regulation of the temperature regime. Due to the fact that the evaporation of cold water from the surface of the lake is very small, clouds cannot form over Baikal. In addition, the air masses that bring clouds from the land heat up when passing the coastal mountains, and the clouds dissipate. As a result, the sky over Baikal is clear most of the time. This is also evidenced by the numbers: the number of hours of sunshine in the area of ​​Olkhon Island is 2277 hours (for comparison, on the Riga seashore in 1839, in Abastumani (Caucasus) - 1994). You should not think that the sun always shines over the lake - if you are not lucky, you can run into one or even two weeks of disgusting rainy weather even in the sunniest place of Baikal - on Olkhon, but this is extremely rare.

The average annual water temperature on the surface of the lake is +4°C. Near the coast in summer the temperature reaches +16-17°C, in shallow bays up to +22-23°C.

Wind and waves.

The wind on Baikal blows almost always. More than thirty local names of winds are known. This does not mean at all that there are so many different winds on Baikal, just that many of them have several names. The peculiarity of the Baikal winds is that almost all of them almost always blow along the coast and there are not as many shelters from them as we would like.

Prevailing winds: northwest, often called mountain winds, northeast (barguzin and verkhovik, also known as angara), southwest (kultuk), southeast (shelonnik). The maximum wind speed recorded on Lake Baikal is 40 m/s. In the literature, there are also large values ​​- up to 60 m / s, but there is no reliable evidence for this.

Where there is wind, there, as you know, there are waves. I note right away that the opposite is not true - the wave can be even with complete calm. Waves on Lake Baikal can reach a height of 4 meters. Sometimes values ​​​​of 5 and even 6 meters are given, but this is most likely an estimate “by eye”, which has a very large error, as a rule, towards overestimation. The height of 4 meters was obtained using instrumental measurements in the open sea. The excitement is strongest in autumn and spring. In the summer on Lake Baikal, strong excitement is rare, and calm often occurs.

Baikal- a lake of tectonic origin located in the southern part of Eastern Siberia, on the border of the Republic of Buryatia and the Irkutsk region

Baikal itself

Lake Baikal stretches from southwest to north for 636 kilometers. The width of the lake varies from 25 to 80 km. The water surface area is 31,722 km. sq. The length of the coastline is 2100 km. Baikal is the deepest lake in the world - its maximum depth is 1642 meters. The lake has huge reserves of fresh water - 23,615 km. cubic meters, which is 20% of all world reserves.

The area around

Lake Baikal is surrounded on all sides by hills and mountain ranges. At the same time, the western coast is steep and rocky, while the eastern coast is more gentle. 336 streams and rivers flow into the Lake. The largest tributaries: Upper Angara, Selenga, Turka, Barguzin, Sarma, Snezhnaya. Only one river flows out of the lake - the Angara. There are 27 islands on Baikal, the largest of the islands is Olkhon, which is 71 km long and 12 wide, the largest peninsula is Svyatoy Nos

Climate

The huge water mass of Lake Baikal has a strong influence on the climate of the coastal area. Summers are cooler here, while winters are milder. Spring comes later by 10-15 days compared to the surrounding areas, and sometimes longer. The peculiarities of the climate are determined by the Baikal winds, which even have their own names - Sarma, Barguzin, Kultuk, Verkhovik.

When to go to Baikal

Characteristics

Briefly the main characteristics of Baikal

• Length - 363 km.
• Width - 79.5 km.
• Area -31722 sq. km.
• Volume - 23615 cubic meters. km.
• The average depth is 744 meters.
• The maximum depth is 1637 meters.
• There are 27 islands on Baikal.
• 29 fish species are endemic

Depth

Lake Baikal is the deepest in the world - 1637 meters, the depth was established in 1983. At the same time, the average depth is also very large - 744 meters. In 2002, these data were confirmed and a depth map was compiled.

• the area of ​​Baikal is equal to the area of ​​three countries - Denmark, Belgium, the Netherlands.
• Baikal is the deepest lake on earth
• The lake contains 19% of the world's fresh water

Sergey Gabdurakhmanov / flickr.com Yuri Samoilov / flickr.com Vera & Jean-Christophe / flickr.com Délirante bestiole / flickr.com Vladislav Bezrukov / flickr.com fennU2 / flickr.com -5m / flickr.com Vladislav Bezrukov / flickr.com Voyages Lambert / flickr.com Vera & Jean-Christophe / flickr.com Sergey Gabdurakhmanov / flickr.com Kyle Taylor / flickr.com Seal on Lake Baikal (Sergey Gabdurakhmanov / flickr.com) Thomas Depenbusch / flickr.com Sergey Gabdurakhmanov / flickr.com Kyle Taylor / flickr.com Sergey Gabdurakhmanov / flickr.com seseg_h / flickr.com Richard Thomas / flickr.com Daniel Beilinson / flickr.com NASA's Earth Observatory / flickr.com Clay Gilliland / flickr.com Aleksandr Zykov / flickr.com Aleksandr Zykov / flickr.com Aleksandr Zykov / flickr.com

This is the deepest lake in the world, its greatest depth reaches 1642 meters. It is also the world's largest natural reservoir of fresh water. The lake basin is of tectonic origin and is a rift.

Lake Baikal is one of the most interesting natural attractions in Russia. Since 1996 it has been a UNESCO World Heritage Site.

The size of this reservoir is really impressive. The length of the lake from southwest to northeast is 620 km, and its width varies from 24 to 80 km. The area of ​​the reservoir is 31,722 sq. km, and the length of its coastline is 2100 km.

Baikal is the deepest lake in the world with the greatest depth of 1642 meters. At the same time, the average depth of this unique reservoir reaches 744 meters. The volume of water is 23,615 cubic meters. km, which is approximately 19% of the total volume of fresh lake water in the world. The water mirror is located at absolute elevations of 456-457 m.

More than 300 different streams flow into Lake Baikal, the largest of which are the Selenga, Upper Angara, Barguzin, Turka, etc. The only river flowing out of the lake is the Angara.

Baikal has 27 islands, the largest of which is Olkhon. Its area is 729 sq. km. The length of this island is more than 70 km, and the width is up to 15 km.

The water level in Baikal is subject to fluctuations. The difference between the highest and lowest annual levels usually does not exceed 23 centimeters. However, these seemingly small fluctuations lead to an increase or decrease in the volume of lake water by about 3 cubic kilometers. The level of Lake Baikal depends mainly on the amount of precipitation falling on the territory of its catchment area.

Baikal climate

During the cold period, it is always slightly warmer near the lake, and during the warm period it is cooler than in the surrounding area. In this respect, the Baikal climate is similar to that of the sea.

Mirror Baikal (Yuri Samoilov / flickr.com)

As in the case of the sea, such climate features are due to the fact that in the summer a huge volume of lake water accumulates a huge amount of heat, and then, in autumn and winter, it gives this heat back. This is how the softening effect of the lake on the sharply continental climate of Eastern Siberia, which is characterized by strong contrast, is manifested.

The warming effect of the lake extends for about 50 km from its shores. In the cold season, the temperature on the coast of Lake Baikal can be 8-10 degrees higher than away from the lake, and in the warm season it is just as much lower than the temperatures of the surrounding area. Usually, this difference is about 5 degrees. Baikal smooths out not only annual, but also daily temperature fluctuations.

To a large extent, the climate of Lake Baikal is determined by its inland location, as well as the height of the mirror above sea level.

Average annual temperature and precipitation

The average annual temperature varies from 0.7 degrees below zero (in the south) to 3.6 degrees below zero (in the north). The highest average temperature is recorded in Peschanaya Bay in the west of the reservoir. It is 0.4 degrees above zero, which makes this bay the warmest place in all of Eastern Siberia.

The slopes of the mountains on the eastern and southeastern coasts of Lake Baikal (1000–1200 mm) are characterized by the maximum amount of precipitation, and the minimum amount is on the western shore of the lake, Olkhon Island and in the lower reaches of the Selenga (less than 200 mm).

Ice on Baikal

Baikal is under ice for about five months a year. The time of ice cover establishment varies from the last week of October (shallow bays) to the beginning of January (deep water areas).

Winter evening on Lake Baikal, Siberia, Russia (Thomas Depenbusch / flickr.com)

Spring ice drift begins at the end of April, and the lake is completely free of ice only in the first half of June.

Ice thickness by the end of winter is about one meter, in bays - up to two meters. The ice of Lake Baikal is interesting because, in especially severe frosts, it is torn apart by cracks into separate ice fields. The width of such cracks reaches 2-3 m, and their length is many kilometers.

The cracking of the ice cover is accompanied by loud rolling sounds. In addition, Baikal ice is famous for its amazing transparency.

Wind

A characteristic feature of the Baikal climate is its winds, each of which has its own name. The most powerful wind of Lake Baikal is the sarma, the speed of which reaches 40 m/s, and sometimes up to 60 m/s. This is a strong squally wind blowing in the central part of the lake, from the valley of the Sarma River. Other Baikal winds: barguzin, verkhovik, mountain, kultuk and shelonnik.

Another interesting feature of the local climate is a very large number of clear days a year, the number of which is even greater than on the Black Sea coast of the Caucasus.

Nature of Baikal: flora and fauna

Baikal flora is very diverse and rich, it includes more than 1000 plant species. The slopes of the mountains located along the shores of the lake are usually covered with taiga.

Baikal cow, Siberia, Russia (Daniel Beilinson / flickr.com)

Siberian cedar and larch are found in abundance in the local forests. Birch, poplar, aspen, currant, etc. grow along the rivers. As for aquatic plants, there are approximately 210 species of algae. The Baikal fauna is represented by more than 2600 species and subspecies, more than a thousand of which are endemic. The 27 species of fish that live in the lake do not live in any other body of water in the world.

There are many kinds of fish in Baikal. Most unusual is the viviparous golomyanka fish, which is endemic to Lake Baikal. The main commercial fish is the Baikal omul. More than 80% of the total zooplankton biomass is another endemic species, the epishura crustacean. This crustacean is engaged in water purification, playing the role of a filter, and also serves as an important part of the diet of the Baikal omul and other organisms.

Nerpa on Baikal (Sergey Gabdurakhmanov / flickr.com)

Another well-known endemic of the lake is the Baikal seal, which is the only freshwater seal in the world. The largest rookeries of this most interesting animal are located on the Ushkany Islands, in the central part of Lake Baikal.

There is still debate among scientists about how the Baikal seal entered the lake, which is located so far from the oceans. It is assumed that it penetrated Baikal from the Arctic Ocean along the Yenisei and Angara during the Ice Age. Of the animals that live in the Baikal forests, one can note the brown bear, wolverine, musk deer, red deer, elk, fox, squirrel, etc.

236 species of birds live on Baikal, of which 29 species are waterfowl. Ducks and gulls are found here in large numbers. Also, you can meet geese, screaming swans, gray heron, black-throated diver, golden eagle, etc.

Ecology

The unique nature of Baikal is notable for its fragility. All local living organisms are very sensitive to the slightest changes in environmental conditions. The process of decomposition of pollutants in the lake is very slow. The ever-increasing anthropogenic load cannot but affect this fragile ecosystem.

Boat on Baikal (-5m / flickr.com)

Of the enterprises located directly on the banks of the reservoir, the most famous is the Baikal Pulp and Paper Mill, founded back in the 1960s.

The bottom runoff of the Baikal Pulp and Paper Mill spreads along the underwater slope of the Baikal depression. The area of ​​the pollution spot covers about 299 sq. km. Due to bottom runoff, the pulp and paper mill degrades the bottom ecosystems of Lake Baikal, and the emissions of this enterprise into the atmosphere negatively affect the adjacent taiga.

Despite many protests by environmentalists and activists, the Baikal Pulp and Paper Mill continued to produce pulp until the end of 2013. Now the plant has stopped its work, however, it will take many more years to eliminate its waste and restore the environment.

The pollution of the nature of this unique reservoir did not end at all with the closure of the pulp and paper mill. A major source of pollution of the lake is its most important tributary - the Selenga River, in the basin of which such large cities as Ulaanbaatar and Ulan-Ude, as well as numerous industrial enterprises of Mongolia and Buryatia, are located.

Partial pollutants come even from the territory of the Trans-Baikal Territory, from settlements located along the tributaries of the Selenga. Most of the treatment facilities in small settlements of Buryatia are not fully capable of coping with wastewater treatment.

Serious damage to the flora and fauna of the reservoir is caused by poachers.

Tourism

Lake Baikal is one of the most popular tourist sites in Russia, recognized by UNESCO as a World Heritage Site. The starting points of most trips to the deepest lake in the world are Irkutsk (the southwestern part of the reservoir), Ulan-Ude (the east of the lake) and Severobaikalsk (the northern tip). Of these cities, it is most convenient to start your route directly to the lake.

An old motorcycle on the background of Lake Baikal (Vladislav Bezrukov / flickr.com)

To the south of Irkutsk, at the mouth of the Angara, is the village of Listvyanka, which is the most popular resort on Lake Baikal. There is a developed tourist infrastructure, in addition, numerous excursions are organized from here. On the southwestern coast of the reservoir there are also the cities of Slyudyanka and Baikalsk. The recreational zone Baikalskaya Gavan is located on the eastern coast.

Another well-known center of attraction for tourists is Olkhon Island, which is distinguished by a variety of natural landscapes. Olkhon can be reached by ferry from the village of Sakhyurta; the largest settlement of the island is the village of Khuzhir, where there is a fairly developed tourist infrastructure.