Brian Barton
The Aral Sea, formerly the fourth-largest inland sea in the world, has been shrinking since the 1960s due to water diversion for agriculture, particularly the cotton industry, and inefficient water allocation. This has resulted in severe environmental and health problems for the region, with local inhabitants being the most vulnerable. The shrinking of the sea has exposed the seabed, leaving behind salts, minerals, and toxins that contaminate the soil and are picked up by the wind, leading to increased health issues such as respiratory diseases and cancers. The water that remains in the Aral Sea has also become highly polluted with toxic chemicals and pesticides, further exacerbating the health crisis.
| Characteristics | Values |
|---|---|
| Water Loss | Water level dropped by 23 meters since the onset of its primary sources of water being diverted |
| Water volume reduced by a factor of fourteen since the 1960s | |
| Water inflow has been rapidly decreasing since 1960 | |
| Salinity | Inflow of salts to the sea exceeded the salt discharge, leading to a steep rise in salinity |
| South Aral Sea is too saline to host any species other than halotolerant organisms | |
| South Aral Sea has been incapable of supporting fish since the late 1990s | |
| Pollution Sources | Pesticides and fertilizers from inefficient irrigation systems |
| Industrial pollution, including heavy metals and PCB | |
| Toxins from weapons testing | |
| Mining industry drainage | |
| Health Problems | Renal tubular dysfunction in children |
| Increased infant mortality rates | |
| Respiratory diseases and cancers | |
| Fertility issues |
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What You'll Learn
- The Aral Sea is polluted by toxic chemicals from weapons testing
- Industrial pollution and agricultural activities have contaminated the water and soil
- The water loss in the Aral Sea has led to a steep rise in salinity
- The health of local residents has been adversely affected, with increased infant mortality rates
- The region's once-prosperous fishing industry has been devastated, causing economic hardship
The Aral Sea is polluted by toxic chemicals from weapons testing
The Aral Sea is a body of water that has suffered an unnatural disaster over the last 60 years, resulting in an ecosystem collapse. The lake, which was once a prosperous fishing port, has seen its water levels drop by approximately 23 meters, its area decrease by 74%, and its volume reduced by 90%. The water supply to the Aral Sea decreased due to its primary sources being diverted, and the demand for cotton in the surrounding areas increased. As a result, more pesticides and fertilizers were poured onto the land, and the runoff from the fields washed toxic chemicals into the shrinking sea, creating severe pollution and health problems.
The receding sea has left huge plains covered with salt and toxic chemicals from weapons testing, industrial projects, and the runoff of pesticides and fertilizers. In 1948, a top-secret Soviet bioweapons laboratory was established on an island in the center of the Aral Sea, which later became known as a testing ground for Soviet biological weapons during the Cold War. The exact history and current status of this facility are unclear, but it is known that bio-agents tested there included Bacillus anthracis, Coxiella burnetii, and Variola major (smallpox). In 1971, weaponized smallpox from the island infected a nearby ship, spreading to the city of Aral and resulting in three deaths.
The toxic chemicals from the dry seabed and polluted water have caused serious health issues in the region, particularly in women and children. There has been a high prevalence of renal tubular dysfunction in children, which is related to growth and developmental stunting. The rate of infants born with abnormalities is five times higher in this region than in European countries, and 26% of children are born with low birth weight. In addition, toxic chemicals associated with pesticide use have been found in the blood and breast milk of mothers, which can be passed on to their children.
The pollution in the Aral Sea has had devastating environmental and economic impacts on the region. The once-thriving fishing industry has been destroyed, bringing unemployment and hardship to the local inhabitants. The increasing salinity of the water has made it unfit for drinking and killed off many fish species, further exacerbating the pollution issue. Overall, the Aral Sea crisis is considered one of the planet's worst environmental disasters, with far-reaching consequences for both the natural world and human populations.
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Industrial pollution and agricultural activities have contaminated the water and soil
The Aral Sea, once the world's fourth-largest inland sea, has been subjected to severe industrial pollution and agricultural activities, leading to contaminated water and soil. The region's once-thriving fishing industry has been devastated, causing unemployment and economic hardship.
The primary cause of the Aral Sea's desiccation is the significant loss of water due to diversion for irrigation projects. This has resulted in a steep rise in salinity, making the water unfit for drinking and killing off aquatic life. The receding sea has left vast plains covered in salt and toxic chemicals from weapons testing, industrial projects, and agricultural runoff.
Agricultural activities, particularly the cotton industry, have resulted in widespread soil erosion, chemical pollution, and poor water quality. The demand for cotton led to the application of excessive amounts of pesticides and fertilizers, which washed into the shrinking sea, creating severe pollution and health problems. The use of pesticides and fertilizers has also contaminated the region's water sources, with toxins such as HCH, TCCD, and DDT found in fish, sheep, milk, eggs, and various foods.
Industrial pollution has also played a significant role in contaminating the water and soil in the Aral Sea region. The extensive mining industry has resulted in high concentrations of heavy metals, such as copper, nickel, and lead, flowing into the rivers and exceeding WHO recommendations. Polychlorinated biphenyl (PCB) compounds, resulting from industrial activities, have been detected in the region's food sources and have contributed to the high levels of pollutants in the water and food.
The consequences of this pollution and agricultural activities have been dire for the local population. High exposure to pollutants has led to increased infant mortality rates and various health issues in women and children, including renal tubular dysfunction and developmental abnormalities. The drying of the sea has also exposed contaminants on the surface, which have been blown in the air and adversely affected the health of residents, causing respiratory diseases and cancers.
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The water loss in the Aral Sea has led to a steep rise in salinity
The Aral Sea has been described as an example of ecosystem collapse. The water loss in the Aral Sea has led to a steep rise in salinity. By 1970, the water loss exceeded the limit of natural water level variation. The water level has dropped approximately 23 meters since the onset of its primary sources of water being diverted. The river inflow has been rapidly decreasing since 1960. The evaporation rate has also increased, which has further accelerated the rate of water loss.
The salinity of water is determined by the mass of salts dissolved in the water and the volume of water. As the sea level dropped because of water loss, the inflow of salts to the sea exceeded the salt discharge, and as a result, salinity levels rose. In the first decade, the salinity increased by 14%, which exceeded the threshold for many commercial fish. As a result, commercial fishing catches fell from 43,430 tons in 1960 to zero in 1980. From 1960 to 2004, surface salinity increased from 10ppt in 1960 to 92ppt in 2004. The steep rise in salinity is one of the most visible elements of the Aral Sea crisis.
The increase in salinity has had a devastating impact on the fishing industry in the region, which has seen significant declines in fish populations and fishing yields. The South Aral Sea remains too saline to host any species other than halotolerant organisms. The North Aral Sea has also seen a decline in fish populations, with many native fish species becoming extinct or extirpated due to the increase in salinity.
The rise in salinity has also affected vegetation in the region. The increase in salt content has led to a change in vegetative cover, with plants beginning to die off as a result of the increased salinity. This has resulted in a reduction of vegetation in the region by at least 40%. The decrease in vegetation has intensified winds, leading to more frequent and severe dust storms. Six million hectares of agricultural land have been destroyed due to salinization and desertification.
The loss of water in the Aral Sea and the subsequent rise in salinity have had far-reaching consequences for the region, including environmental, social, and economic impacts. The United Nations has described the crisis as a "full-blown environmental catastrophe". Efforts are being made to restore the North Aral Sea, with the construction of the Dike Kokaral dam completed in 2005, which has led to a rise in water levels and a decrease in salinity. However, the South Aral Sea remains severely affected by the high salinity levels, rendering it incapable of supporting fish populations and the region's fishing industry.
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The health of local residents has been adversely affected, with increased infant mortality rates
The Aral Sea has been described as "one of the planet's worst environmental disasters" by the United Nations Secretary General, Ban Ki-moon. The region has been heavily affected by pollution, which has had serious public health consequences for local residents.
The primary effect of the Aral Sea drying up has been a significant loss of water. The water level has dropped by approximately 23 meters since the 1960s, and the lake split into two separate bodies of water in 1987. The shrinking of the Aral Sea has left huge plains covered in salt and toxic chemicals from weapons testing, industrial projects, and the runoff of pesticides and fertilizers. As the sea dries up, these contaminants are exposed on the surface, entering the soil and becoming airborne.
Infants and children face the highest risk from exposure to these contaminants and toxins, which have led to an increasing infant mortality rate in the area. Infant mortality rates have been rising in this region since the 1970s, while elsewhere in the world, they have generally been decreasing. In Kazakhstan, the infant mortality rate was as high as 70 per 1000 in 1993. Toxins can be absorbed by breathing polluted air, drinking contaminated water, and from food. These contaminants have also been found in breast milk, leading physicians in some areas to recommend against breastfeeding. Renal tubular dysfunction has become a significant health concern in children in the region, and it can be related to growth and developmental stunting.
The health of local residents has also been affected in other ways. There has been an increase in many diseases and conditions linked to the shrinking of the Aral Sea, including respiratory diseases and cancers. Diarrhoeal disease is frequently reported, and the infant death rate due to diarrhoea is twice that of bordering areas. Parasitic infections and tuberculosis are also prevalent, with multi-drug-resistant tuberculosis presenting a significant challenge in the region. The environmental disaster has also led to socio-economic issues, with residents facing unemployment, low incomes, and enterprise closures.
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The region's once-prosperous fishing industry has been devastated, causing economic hardship
The Aral Sea, once the world's fourth-largest inland sea, has been shrinking since the 1960s due to human activity and climate change. This has had a devastating impact on the region's once-thriving fishing industry, causing economic hardship and unemployment for thousands.
The town of Moynaq in Uzbekistan, for example, was once a bustling fishing port that employed around 30,000 people. Now, the town lies 30-90 kilometres from the shore, and fishing boats lie abandoned on the dry, dusty land that was once covered by water. The Aral Sea's water volume has reduced by a factor of fourteen since the 1960s, and the remaining water has become too saline to support fish life. The South Aral Sea has been incapable of supporting fish life since the late 1990s when flounder were killed by rising salinity levels. The total fish catch in the Lower Amu Darya, a tributary of the Aral Sea, declined to just 13% of its 1972 level by 1992.
The shrinkage of the Aral Sea is largely due to the demand for water from the local agriculture industry, particularly the cotton industry. In the 1960s, the Soviet Union created collective farms in the region, leading to a sharp increase in water usage. Inefficient irrigation systems and the failure to maintain infrastructure have also contributed to the sea's shrinkage. As the water level decreased, the salt and mineral content of the lake rose, making the water unfit for drinking and killing off fish.
The receding sea has also left behind toxic chemicals from weapons testing, industrial projects, and pesticide and fertiliser runoff. These toxins have contaminated the soil and have been picked up by the wind, spreading to other areas, including crop lands. The local community has suffered increased health problems, including respiratory diseases and cancers, and there has been a rise in infant mortality rates.
The economic hardship caused by the devastation of the fishing industry has been compounded by the health issues arising from the polluted environment. The region lacks the necessary health infrastructure and resources to address these issues, and the full extent of the environmental and health impact may not be known for a generation.
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Frequently asked questions
Yes, the Aral Sea is heavily polluted. The water and soil in the region are affected by toxic pollutants from industry and agriculture.
The pollution in the Aral Sea is caused by a variety of factors, including the runoff of pesticides and fertilizers from nearby farms, inefficient irrigation systems, industrial pollution, and extensive mining in the area.
The pollution in the Aral Sea has had severe health consequences for the local population. High exposure to industrial pollutants, pesticides, and heavy metals has led to increased infant mortality rates and respiratory and developmental issues in children. The pollution has also contaminated local food sources, including fish, sheep, milk, eggs, and vegetables.
