Alteration of water level and salinity of the Aral Sea

Author(s):  
Vitalyi N. Bortnik
Keyword(s):  
2020 ◽  
Vol 57 (2) ◽  
pp. 69-77
Author(s):  
Г. В. Айзель ◽  
А. С. Ижицкий ◽  
А. K. Курбаниязов ◽  
Ж. А. Жанабаева
Keyword(s):  

2020 ◽  
Author(s):  
Anchita Anchita ◽  
Kamshat Tussupova ◽  
Peder Hjorth

<p><strong>Abstract: </strong>Decrease of saline lakes, which comprises of 44% of all the available lake water, is a major concern. It additionally brings to desertification process to the region. Thus, various countries have taken different actions in protecting their lake’s water level. The aim of this paper is to assess different strategies directed to tackle the decreasing saline lake water levels. Lake Urmia and the Aral Sea which split into North Aral and South Aral were among the world's largest saline lakes and now have reduced to 10% of their original size. A thorough review of academic reports, official documents and databases were considered. Although the dry-up of the lake is a natural process, it has been sped up by human interventions in the hydrology cycle. Dust storms (strong winds) in the case of the Aral Sea, transmit the pollutants from dry lake surface which initially accumulated in the lakebed causing severe health issue. Various strategies were implemented to manage the socio-economic conditions caused due to the drying of lakes. The strategy implemented for the North Aral Sea was to restore the lake by reducing the water withdrawal from tributary rivers which leads to increased water level in the sea. The strategy implemented for Lake Urmia was to restore the lake by water transfer activities from neighbouring water sources which until now show no increase in water level. The strategy implemented for the South Aral Sea was to use a dry lakebed to diversify the economy by oil and mineral extraction which shows the adaptation to the environmental conditions with no restoration strategy. As a conclusion, it is found that there is no common best solution for this kind of problem. The best fit depends on the local context and it is strongly path dependent.<strong> </strong></p><p>Keywords: Drying saline lake; Dust storms; Aral sea; Health impacts; Lake Urmia; Restoration of saline lake; Strategies.</p>


Hydrology ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 30 ◽  
Author(s):  
Timur T Berdimbetov ◽  
Zhu-Guo Ma ◽  
Chen Liang ◽  
Sana Ilyas

The Aral Sea in Central Asia plays an essential role in the socio-economic development of the region. During the last six decades, there has been remarkable changes observed in the water level and areal extent of the Aral Sea Basin; however, the causes behind these changes are unclear. This study quantifies the impacts of climatic and anthropogenic drivers on Aral Sea and the contributions made by these drivers to the variations observed in the Aral Sea Basin. The spatial and temporal seasonal variations in groundwater budget have been analyzed using the total water storage (TWS) of the basin from 2002 to 2015. The results from this study revealed significant increases in the the mean air temperature, precipitation, and potential evapotranspiration rate from 1960 to 2015 in the Aral Sea Basin. The TWS time-series shows a statistically significant declining trend of about 2 to 4 cm per year presented by the surface water storage. Based on the average monthly values of TWS, March 2005 presented the highest anomaly ~7.85 cm, while October 2008 showed the lowest anomaly ~8.22 cm between 2002 to 2015. The groundwater level indicates a small increasing trend of approximately 0.05 cm/year during the study period. Furthermore, the negative relationship between water level, climatic, and anthropogenic factors showed that these factors projected critical impact on the water level fluctuations within the Aral Sea Basin.


2016 ◽  
Vol 320 (2) ◽  
pp. 221-244
Author(s):  
P. Micklin ◽  
N.V. Aladin ◽  
I.S. Plotnikov ◽  
Z.K. Ermakhanov

The Aral Sea, a large saline terminal lake in Central Asia, since 1960 dries quickly, and by September 2009 it had separated into four residual water reservoirs. The maximum water level decline exceeded 26 m, the surface area has decreased by 88% and water volume by 92%. Salinity increased by more than 20-fold. Prior to the modern recession, the Aral Sea experienced a number of water level declines and subsequent recoveries over the last 10 millennia. The main causative factor until the 1960s was the periodic westward diversion of the Amu Dar’ya towards the Caspian Sea by both natural and human forces. Modern regression is the result of irrigation development and has caused many severe problems. To restore the Aral Sea to its present state would be very difficult, if not impossible, in the foreseeable future. However, a partial restoration of its separate parts is possible. Completed in 2005 project has allowed to raise the level of the Small (northern) Aral Sea and further reduce its salinity. In the paper are discussed plans for further rehabilitation of the Small Sea and possible restoration of some parts of the Large (southern) Aral Sea.


Water ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3196
Author(s):  
Anchita ◽  
Aibek Zhupankhan ◽  
Zhaniya Khaibullina ◽  
Yerlan Kabiyev ◽  
Kenneth M. Persson ◽  
...  

Once one of the largest saline lakes, the Aral Sea, was recognized as a significant environmental disaster as the water level decreased dramatically. Water level decrease increases water salinity, affecting biodiversity. Exposed lake beds become the source for fine dust picked up by the dust storms and spread across a long distance, affecting people’s health in surrounding areas. This review paper attempts to evaluate the potential links between the Aral Sea shrinking and the existing health issues in the case of Kazakhstan. The literature-based research revealed that the population of the Aral Sea basin region has been suffering from exposure to various pollutant residues for a long time. There is an apparent increase in morbidity and mortality rates in the region, especially in people suffering from chronic illness. Furthermore, the catastrophic desiccation of the Aral Sea has led to the sharp deterioration in living conditions and negative trends in the socio-economic situation of the region’s population. While the dust storms spread the polluted salts from the exposed bottom across the Aral Sea region, specific contaminants define the relevance and importance of public health problems linked to the basin rather than the Aral Sea drying process. There is, however, no clear evidence that associated dust storms are the only primary source of the deterioration of people’s health. Moreover, One Health approach seems to play a crucial role in achieving better outcomes in the health of people and the health of the environment.


Sign in / Sign up

Export Citation Format

Share Document