Investigate the relationships between the Aral Sea shrinkage and the expansion of cropland and reservoir in its drainage basins between 2000 and 2020

The Aral Sea crisis is considered one of the most severe ecological tragedies from the 1960s in Central Asia. The reasons for this crisis, especially in the twenty-first century, are still scientific disputes. This study investigated the relationship between land cover change in the Aral Sea related...

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Bibliographic Details
Published in:International journal of digital earth 2021-06, Vol.14 (6), p.661-677
Main Authors: Li, Qiang, Li, Xin, Ran, Youhua, Feng, Min, Nian, Yanyun, Tan, Meibao, Chen, Xi
Format: Article
Language:English
Subjects:
21st century
Agricultural land
Aral Sea
Crises
Cultivated lands
Drainage basins
endorheic river basins
Irrigation
Irrigation water
Karakum Canal
Land cover
Ocean basins
remote sensing
Reservoirs
Resource management
River basins
Water conservation
water resource management
Water resources
Water resources management
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Summary:The Aral Sea crisis is considered one of the most severe ecological tragedies from the 1960s in Central Asia. The reasons for this crisis, especially in the twenty-first century, are still scientific disputes. This study investigated the relationship between land cover change in the Aral Sea related basins and the Aral Sea crisis from 2000 to 2020 by employing the GlobeLand30 dataset with 30 m resolution. Results showed that the cultivated land in the Aral Sea basin increased by 2,291 km 2 , and 75.4% of it occurred in the region of Karakum Canal, the largest water conservancy project for irrigation in the world. The water surface area of reservoirs increased by 1,183.5 km 2 during the same period. Coincident with this change, the Aral Sea further shrank from 26,280.8 km 2 in 2000 to 9,285.2 km 2 in 2020, mainly occurred in the first decade of the twenty-first century. These imply that the Aral Sea crisis is persistent in the twenty-first century and is likely driven by water competition among different regions within the basin for agricultural irrigation. Strengthening the coordination and cooperation of cross-boundary water resource management is still the most important management strategy choice to address the crisis from a broader perspective.
ISSN:1753-8947
1753-8955
DOI:10.1080/17538947.2020.1865466