- Lake Balkhash
View from Space, April 1991 Location Kazakhstan Coordinates Coordinates: Lake type Endorheic, Saline Primary inflows Ili, Karatal, Aksu, Lepsi, Byan, Kapal, Koksu rivers Primary outflows evaporation Basin countries Kazakhstan 85%
Max. length 605 km (376 mi) Max. width East 74 km (46 mi)
West 19 km (12 mi)
Average depth 5.8 m (19 ft) Max. depth 26 m (85 ft) Water volume 106 cu mi (440 km3) Surface elevation 341.4 m (1,120 ft) Frozen November to March
Lake Balkhash (Kazakh: Балқаш Көлі, Balqaş köli; Russian: Озеро Балхаш, Ozero Balkhash) is one of the largest lakes in Asia and 12th largest continental lake in the world. It is located in southeastern Kazakhstan, in Central Asia, and belongs to an endorheic (closed) basin shared by Kazakhstan and China, with a small part in Kyrgyzstan. The basin drains into the lake via seven rivers. The major one is the Ili River, which brings the majority of the riparian inflow; others, such as the Karatal, provide both surface and subsurface flow. The Ili is fed from precipitation (largely vernal snowmelt) from the mountains of China's Xinjiang region.
The lake currently covers 16,400 km2 (6,300 sq mi), but, like the Aral Sea, it is shrinking because of the diversion of water from the rivers that feed it. The lake is divided by a strait into two distinct parts. The western part is fresh water, while the eastern half is saline. The eastern part is on average 1.7 times deeper than the western part. The largest city in the lake area is also named Balkhash and has about 66,000 inhabitants. Major industrial activities in the area are mining, ore processing and fishing.
While the size of the lake is temporarily growing, there is concern about the lake's shallowing due to desertification and industrial activity.
History and naming
From as early as 103 BC up until the 8th century, the Balkhash polity was known to the Chinese as Pu-Ku/Bu-Ku. From the 8th century on, the land to the south of the lake, between it and the Tian Shan mountains, was known as "Seven Rivers" (Jetisu in Turkic, Semirechye in Russian). It was a land where the nomadic Turks and Mongols of the steppe mingled cultures with the settled peoples of Central Asia.
During China's Qing Dynasty (1644–1911), the lake formed the northwestern-most boundary of the Empire. In 1864, the lake and its neighboring area were ceded to Imperial Russia through the Sino-Russian Treaty. With the dissolution of the Soviet Union in 1991, the lake became part of Kazakhstan.
The origin of the lake
Balkhash lies in the deepest part of the vast Balkhash-Alakol depression, which was formed by the sloping trough the Turan Plate in Neogene-Quaternary Period and subsequently filled with sand river sediments. The basin is a part of Dzungarian Alatau, which also contains lakes Sasykkol, Alakol and Aibi. These lakes are remnants of an ancient sea which once covered the entire Balkhash-Alakol depression, but was not connected with the Aral–Caspian Depression.
The lake has an area of about 16,400 km2 (2000), making it the largest lake which lies entirely within the territory of Kazakhstan. It is elevated about 340 m above sea level and has a crescent shape. Its length is about 600 km and the width varies from 9–19 km in the eastern part to 74 km in the western part. Saryesik Peninsula, located near the middle of the lake, hydrographically divides it into two very different parts. The western part, which comprises 58% of the total lake area and 46% of its volume, is relatively shallow, quiet and is filled with freshwater, whereas the eastern part is much deeper and saltier. These parts are connected by the Strait Uzynaral (Kazakh: Ұзынарал – "long island") which is 3.5 km wide and about 6 m deep.
View of Lake Balkhash from Space (August 2002) The numbers mark the largest peninsulas, island and bays:
- Saryesik peninsula, separating the lake into two parts, and the Strait Uzynaral
- Baygabyl Peninsula
- Balai Peninsula
- Shaukar Peninsula
- Kentubek Peninsula
- Islands Basaran and Ortaaral
- Tasaral Island
- Shempek Bay
- Saryshagan Bay
The lake includes several small basins. In the western part, there are two depressions 7–11 meters deep. One of them extends from the western coast (near Tasaral Island) to Cape Korzhyntubek, whereas the second lies south from the Gulf Bertys, which is the deepest part of western Balkhash. The average depth of the eastern basin is 16 m and the maximum depth of the eastern part (and of the lake) is 26 m. The average depth of the lake is 5.8 m, and the total volume of water is about 112 km3.
The western and northern shores of the lake are high (20–30 m) and rocky; they are composed of such Paleozoic rocks as porphyry, tuff, granite, schist and limestone and keep traces of ancient terraces. The southern shores near the Gulf Karashagan and Ili River are low (1–2 m) and sandy. They are often flooded and therefore contain numerous water pools. Occasional hills are present with the height of 5–10 m. The coastline is very curvy and dissected by numerous bays and coves. The large bays of the western part are: Saryshagan, Kashkanteniz, Karakamys, Shempek (the southern pole of the lake), and Balakashkan Ahmetsu, and those in the eastern part are: Guzkol, Balyktykol, Kukuna, Karashigan. The eastern part also includes peninsulas Baygabyl, Balay, Shaukar, Kentubek and Korzhintobe.
The lake contains 43 islands with the total area of 66 km2; however, new islands are being formed due to the lowering of water level, and the area of the existing ones is increasing. The island of the western part include Basaran and Tasaral (the largest), as well as Ortaaral, Ayakaral and Olzhabekaral. The eastern islands include Ozynaral, Ultarakty, Korzhyn and Algazy.
Feeding the lake and the water level
Balkhash-Alakol Basin covers an area of 512,000 km2, and its average surface water runoff is 27.76 km3/year, of which 11.5 km3 come from the territory of China. The area of drainage basin of the lake is about 413,000 km2; with 15% belonging to the north-west of Xinjiang region in China and a small part in Kyrgyzstan. Lake Balkhash takes 86% of water inflow from Balkhash-Alakol basin. Ili River accounts for 73–80% of the inflow with the total volume quoted as either 12.3 km3/year or 23 km3/year. The river originates in Tian Shan mountains and is mainly fed by glacier. This results in daily and seasonal fluctuations of its water level with a strong increase during the glacier melting season in June–July. The river forms an extended delta which covers the area of 8,000 km2 and serves as an accumulator, providing water in the drought years.
The eastern part of the lake is fed by the rivers Karatal, Aksu and Lepsa, as well as by groundwater. The Karatal River originates on the slopes of Dzungarian Alatau and is the second largest water source for the lake. River Ayaguz, which fed the eastern part of the lake until 1950, barely reaches it nowadays. The annual difference in the flow to the western and eastern parts of the lake is 1.15 km3.
Water balance of the lake in 2000 Total inflow to the lake was 22.51 km3, including:
- Surface water – 18.51 km3,
- Underground water – 0.9 km3,
- Sediments and ice – 3.1 km3.
Total losses amounted to 24.58 km3, including
- Evaporation – 16.13 km3,
- Ili delta – 4.22 km3,
- Ice formation – 0.749 km3,
- Housing and communal services – 0.24 km3,
- Industry – 0.22 km3,
- Agriculture – 3.24 km3,
- Fisheries – 0.027 km3.
The area and volume of the lake vary due to long-term and short-term fluctuations in water level. Long-term fluctuations had an amplitude of 12–14 m, which was minimum between the 5th and 10th centuries and maximum between the 13th and 18th centuries. In the early 20th century and between 1958 and 1969, the area of the lake increased to ~18,000 km2, and during the droughts, for example in the late 1900s, 1930s and 1940s, the lake shrank to ~16,000 km2 with the water level fluctuations of about 3 m. In 1946, the area was 15,730 km2 and the lake volume was 82.7 km3. From the late 1900s, the lake is shrinking due to the diversion of the rivers supplying it. For example, Kapshagay Hydroelectric Power Plant was built on Ili River in 1970. Filling the associated Kapshagay Reservoir disbalanced Balkhash Lake, causing deterioration of water quality, especially in the eastern part of the lake. Between 1970 and 1987, the water level fell by 2.2 m, the volume reduced by 30 km3 and the salinity of the western part was increasing. Projects were proposed to slow the changes down, e.g. by splitting the lake in two with a dam, but were cancelled due to the economic decline in the Soviet Union.
The minimal water level in the lake (340.65 meters above sea level) was recorded in 1987, when the filling Kapshagay Reservoir was completed. The level rose to 342.5 m by January 2005 that was attributed to large volume of precipitations in the late 1990s.
Balkhash is a semi-saline lake, and the chemical composition of its water strongly depends on the hydrographic features of the reservoir. Water in the western part is nearly fresh, with the content of total dissolved solids about 0.74 g/L, and cloudy (visibility 1 m); it is used for drinking and industry. Water in the eastern part is more transparent (visibility 5.5 m) and saline, with the average salt concentration of 3.5–6 g/L. The average salinity of the lake is 2.94 g/L. Long-term (1931–1970) average precipitation of salts in Lake Balkhash is 7.53 million tonnes and the reserves of dissolved salts in the lake are about 312 million tonnes. The water in the western part has a yellow-gray tint, and in the eastern part the color varies from bluish to emerald-blue.
The climate of the lake area is continental. Average temperature is about 30 °C in July and –14 °C in January. Average precipitation is 131 mm per year and the relative humidity is about 60%. Wind, dry climate and high summer temperatures result in high evaporation rate – 950 mm in cold and up to 1200 mm in dry years. Wind has average speed of 4.5–4.8 m/s and blows mainly southward in the western part and to the south-west in the eastern part. The wind induces waves up to 2–3.5 m in height and steady clockwise currents in the western part.
There are 110–130 sunny days per year with the average irradiance of 15.9 MJ/m2 per day. Water temperature at the surface of the lake varies from 0 °C in December to 28 °C in July. The average annual temperature is 10 °C in the western and 9 °C in the eastern parts of the lake. The lake freezes every year between November and early April, and the melting is delayed by some 10–15 days in the eastern part.
Balkhash City Climate chart (explanation) J F M A M J J A S O N D13−9−1810−8−18100−10111431522101228161030188281642299132143−615−5−13 Average max. and min. temperatures in °C Precipitation totals in mm Imperial conversion J F M A M J J A S O N D0.515−10.41700.432140.458370.672500.582610.486650.382600.271490.455350.637210.6238 Average max. and min. temperatures in °F Precipitation totals in inches Water temperature (°C) (data from 1985–1987)  Depth Jan Feb Mar Apr May June July Aug Sep Oct Nov Dec Eastern part of the lake 0 – –0.2 0.2 – 13.9 19.0 23.4 23.2 17.2 11.4 – – 10 – 1 – – 10.8 16.7 21.7 22.8 – – – – 20
(near the bottom)
– 1.7 1.9 – 8.9 13.7 14.6 19.7 17.1 11.5 – – Western part of the lake, near Balkhash City 0 - 0.0 0.8 6.7 13.3 20.5 24.7 22.7 16.6 7.8 2.0 – 3
(near the bottom)
– 0.3 2.2 6.5 13.1 19.6 24.1 22.6 16.5 7.4 2.0 –
Flora and fauna
The shores of the lake contain individual willow trees and riparian forests, mostly composed of various types of populus. Plants include common reed (Phragmites australis), Lesser Indian Reed Mace (Typha angustata) and several species of cane – Schoenoplectus littoralis, Schoenoplectus lacustris and endemic Scirpus kasachstanicus. Under water grow two types of Myriophyllum – spiked (Myriophyllum spicatum) and whorled (Myriophyllum verticillatum); several kinds of Potamogeton – shining (Potamogeton lucens), perfoliate (Potamogeton perfoliatus), kinky (Potamogeton crispus), fennel (Potamogeton pectinatus) and Potamogeton macrocarpus; as well as Common Bladderwort (Utricularia vulgaris), Rigid Hornwort (Ceratophyllum demersum) and two types of Najas. Phytoplankton, the concentration of which was 1.127 g/L in 1985, is represented by numerous species of algae.
The lake used to have rich fauna, but since 1970, biodiversity began to decline due to deterioration of water quality. Before then, there were abundant shellfish, crustaceans, chironomidae and oligochaeta, as well as zooplankton (concentration 1.87 g/L in 1985), especially in the western part. The lake hosted about 20 species of fish, 6 of which were native – Ili Schizothorax (Schizothorax pseudoksaiensis) and Balkhash Schizothorax (Schizothorax argentatus), minnow, Balkhash perch (Perca schrenkii), Nemachilus strauchi, Nemachilus labiatus and Balkhash minnow (Phoxinus poljakowi). Other fish species were alien – carp, spine, oriental bream (Abramis brama orientalis), Aral barbel (Barbus brachycephalus), Siberian dace, carp, tench, perch, catfish, Diptychus, Prussian carp and others. Fishery was focused on carp, perch, asp and bream.
Abundant and dense reed in the southern part of the lake, especially in the delta of Ili River, served as a haven for birds and animals. Changes in the water level led to the degradation of the delta – since 1970, its area decreased from 3,046 to 1,876 km2, reducing wetlands and riparian forests which were inhabited by birds and animals. Land development, application of pesticides, overgrazing and deforestation also contributed to the decrease in biodiversity. Of the 342 species of vertebrate, 22 are endangered and are listed in the Red Book of Kazakhstan. Forests of the Ili delta were inhabited by the rare (now probably extinct) Caspian Tiger and its prey, wild boar. Around 1940s, Canadian muskrat was brought to the Ili delta; it had quickly acclimatized, feeding on Typha, and was trapped for fur, up to 1 million animals per year. However, recent changes in the water level destroyed its habitat, bringing the fur industry to a halt.
Balkhash is also the habitat of 120 types of bird, including cormorants, Marbled Teal, pheasants, golden eagle and great egret; 12 of those are endangered, including White Pelican, Dalmatian Pelican, spoonbill, whooper and erne.
Cities and economy
In 2005, 3.3 million people lived in the basin of the Lake Balkhash, including residents of Almaty – the largest city of Kazakhstan. The largest city on the lake is Balkhash with 66,724 inhabitants (2010). It is located on the northern shore and has a prominent Mining and Metallurgy Plant. A large copper deposit was discovered in the area in 1928–1930 and is being developed in the villages north of the lake. Part of the motorway between Bishkek and Karaganda runs along the western shore of the lake. Western shore also hosts military installations built during the Soviet era, such as radar missile warning systems. The southern shore is almost unpopulated and has only a few villages. Nature and wild life of the lake attract tourists, and there are several resorts on the lake.
The economic importance of the lake is mostly in its fishing industry. Systematic breeding of fish began in 1930; the annual catch was 20 thousand tonnes in 1952, it increased to 30 thousands in the 1960s and included up to 70% of valuable species. However, by 1990s production fell to 6.6 tonnes per year with only 49 tonnes of valuable breeds. The decline is attributed to several factors, including the halt of reproduction programs, poaching and decline in water level and quality.
In 1970, the 364-megawatt Kapshagay Hydroelectric Power Plant was built on Ili River, drawing water out of the new Kapshagan Reservoir for irrigation. Ili's water is also extensively used upstream, in the Xinjiang province of China, for the cultivation of cotton. Currently, there is a project for an additional counter-regulatory dam 23 km downstream from the Kapchagay. The associated 49.5-MW Kerbulak Hydroelectric Power Plant will partially solve the problem of providing electricity to the southern areas of Kazakhstan and will serve as a buffer for daily and weekly fluctuations in the water level of Ili River.
Energy supply to the south-eastern part of Kazakhstan is an old problem, with numerous solutions proposed in the past. Proposals to build power plants on Balkhash in the late 1970s and 1980s stalled, and the initiative to erect a nuclear plant near the village Ulken met strong opposition from environmentalists and residents. Therefore, in 2008 the Kazakhstan government reconsidered and announced building of a Balkhash Thermal Power Plant.
There is a regular ship navigation through the lake, mouth of Ili River and Kapchagay Reservoir. The main piers are Burylbaytal and Burlitobe. The ships are relatively light due to the limiting depth in some parts of the lake; they are used mainly for catching fish and transporting fish and construction materials. The total length of the waterway is 978 km, and the navigation period is 210 days/year.
Navigation on the Lake Balkhash originated in 1931 with the arrival of two steamers and three barges. By 1996, up to 120 thousand tonnes of construction materials, 3,500 tonnes of ore, 45 tonnes of fish, 20 tonnes of melons and 3,500 passengers were transported on Balkhash. However, these values decreased by 2004 to 1000 passengers and 43 tonnes of fish. In 2004, the Balkhash fleet consisted of 87 vessels, including 7 passenger ships, 14 cargo barges and 15 tugboats. The government projects that by 2012, the transported volume in the Ili-Balkhash basin will reach 233 thousand tonnes of construction materials, at least 550 thousand tonnes of livestock and agriculture products and at least 53 tonnes of fish. Development of eco-tourism is expected to increase the passenger traffic to 6,000 people per year.
Environmental and political issues
There are serious concerns about the ecology of the lake, especially in the view of repeating the environmental disaster at the Aral Sea. Since 1970, the 39 km3 outflow of water to fill the Kapchagay Reservoir resulted in a 2/3 decrease in the supply to the lake from Ili River. The concomitant decrease in the level of the lake was approximately 15.6 cm/year, much larger than the natural decline in 1908–1946 (9.2 cm/year). The shallowing of Balkhash is especially evident in its western part. From 1972 till 2001, a small salt lake Alakol, located 8 km south of Balkhash, had practically disappeared and the southern part of the lake lost about 150 km2 of water surface. Of the 16 existing lake systems around the lake only five remain. The desertification process involved about 1/3 of the basin. Salt dust is blown away from the dried areas, contributing to the generation of Asian dust storms, increase the soil salinity and adversely influencing the climate. Increasing formation of silt in the river's delta further reduces the inflow of water to the lake.
Water pollution index
0.5 - clean, 2 - dirty, 4 - very dirty
Location 1997 2000 2001 Gulf Tarangalyk 2.38 3.70 3.96 Gulf MA Sary-Shagan 2.56 4.83 4.52
Another factor affecting the ecology of the Ili-Balkhash basin is emissions due to mining and metallurgical processes, mostly at the Balkhash Mining and Metallurgy Plant operated by Kazakhmys. In the early 1990s, emission level was 280–320 thousand tonnes per year, depositing 76 tonnes of copper, 68 tonnes of zinc and 66 tonnes of lead on the surface of the lake. Since then, emission almost doubled. Contaminants are also brought from the dump sites by the dust storms.
In 2000, a major conference "Balkhash 2000" brought together environmental scientists from different countries, as well as representatives of business and government. The conference adopted a resolution and appeal to the Government of Kazakhstan and international organizations, suggesting new ways of managing the ecosystems of Alakol and Balkhash basins. At the 2005 International Environmental Forum devoted to Lake Balkhash, Kazakhmys announced that by 2006 it will restructure its processes, thereby reducing emissions by 80–90%.
Contamination of Balkhash originates not only locally, but is also brought by inflow of polluted water from China. China also consumes 14.5 km3 of water per year from Ili River, with a planned increase by 3.6 times. The current rate of the increase is 0.5–4 km3/year. In 2007, Kazakhstan Government proposed a price reduction for sales of Kazakh products to China in exchange for reduction of water consumption from Ili River, but the offer was declined by China.
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- Information on Balkhash's geography and biology
- Kazakh 'national treasure' under threat
- United Nations Environmental Programme details on Lake Balkhash
- "Central Asia: Kazakhstan, aid bodies work to save major lake" 13 March 2007 RadioFreeEurope/RadioLiberty
- Balkhash – friends meeting (forum)
- Islands in Lake Balkhash
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Balkhash — [bäl khäsh′] Lake large lake in SE Kazakhstan, half saline & half freshwater, the halves separated by a sandbar: c. 6,500 sq mi (16,835 sq km) … English World dictionary
Lake Markakol — Маркаколь көлі Map of the area … Wikipedia
Lake Chagan — For the lake in Jilin, China, see Chagan Lake (China). Lake Chagan Coordinates 49°56′07″N 79°00′32″E … Wikipedia
Balkhash,Lake — Bal·khash or Bal·qash (băl kăshʹ, bäl käshʹ, KHäshʹ), Lake A shallow lake of southeast Kazakhstan. It has saline water in the east and fresh water in the west. * * * … Universalium
Balkhash, Lake — geographical name lake 376 miles (605 kilometers) long SE Kazakhstan area about 7100 square miles (18,390 square kilometers) … New Collegiate Dictionary