Quantitative Detection and Attribution of Groundwater Level Variations in the Amu Darya Delta

Pan, Xiaohui; Wang, Weishi; Li, Shipeng; Huang, Yanyan; Maeyer, Philippe De; Guo, Chenyu; Ling, Yunan; Akmalov, Shamshodbek

doi:10.3390/w12102869

Cited by 12 publications

(6 citation statements)

References 44 publications

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“…The expansion of arable land and the increase in output value result in an increase in water consumption (Li et al, 2019). Similar to this paper, many studies on irrigation areas in arid areas have shown the large impact of human activities on groundwater in irrigation areas (Li et al, 2020;Pan et al, 2020). In our attribution analysis, with the rise of the groundwater level, it is particularly worth noting that as a cause of rising groundwater, the change in the flow of the Amudarya River was not closely related to groundwater.…”

Section: Discussionsupporting

confidence: 73%

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Spatial and Temporal Evolution Characteristics and Sustainability Analysis of Groundwater in a Typical Inland River Oasis Irrigation Area

Guo

Huang

et al. 2022

Preprint

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The large amount of agricultural land development in the irrigation area of the lower Amudarya has led to a greater amount of water resources being introduced into the irrigation area. The high groundwater level in the irrigation area and the unreasonable management of water resources have led to the deterioration of the regional ecological environment. In the context of global climate change, we used a variety of trend analysis methods and correlation analysis methods and found that human activities are the main factors affecting regional annual groundwater level changes and annual groundwater level fluctuations, accounting for 67.6% and 78.9%, respectively. These factors have led to a high temporal and spatial heterogeneity of the regional groundwater from 1990 to 2020: the multiyear rate of change at various points in the region ranges from -0.054 m/a to 0.098 m/a, and the groundwater level in the entire area is rising at a rate of 0.015 m/a. Under the scenario of increasing groundwater level volatility, the continuously rising water level requires us to consider whether this state will cause harm to the future area, so we used the capillary method to define the regional ecological water level as 1.78-2.78 m. When exploring its relationship with regional groundwater, it was found that starting in March, 72.2% of the regional groundwater level exceeded the ecological water level by an average of 0.38 m, and by July, 83.5% of the region exceeded the ecological water level by an average of 0.98 m; furthermore, the highest point was only 0.5 m from the ground. Under the future changing trend of regional groundwater in the future, such results will cause a further deterioration of regional ecology, and sustainable groundwater exploitation methods with the goal of maintaining the ecological water level should urgently be proposed.

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Section: Discussionsupporting

confidence: 73%

“…Only one study has described the macroscopic changes in the region (Pan et al, 2020), and there is a lack of groundwater research on the characteristics of the irrigation area.…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Evolution Characteristics and Sustainability Analysis of Groundwater in a Typical Inland River Oasis Irrigation Area

Guo

Huang

et al. 2022

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“…The TWS can be divided into three parts, including the inflow from the Amu Darya River, the precipitation, and the groundwater. However, the data of groundwater are not yet available and were calculated in the balance of supply-demand as the residual item [ 9 , 18 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

Analysis of the Water Demand-Supply Gap and Scarcity Index in Lower Amu Darya River Basin, Central Asia

Wang

Huang

Liu

et al. 2022

IJERPH

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Lower reaches of the Amu Darya River Basin (LADB) is one of the typical regions which is facing the problem of water shortage in Central Asia. During the past decades, water resources demand far exceeds that supplied by the mainstream of the Amu Darya River, and has resulted in a continuous decrease in the amount of water flowing into the Aral Sea. Clarifying the dynamic relationship between the water supply and demand is important for the optimal allocation and sustainable management of regional water resources. In this study, the relationship and its variations between the water supply and demand in the LADB from the 1970s to 2010s were analyzed by detailed calculation of multi-users water demand and multi-sources water supply, and the water scarcity indices were used for evaluating the status of water resources utilization. The results indicated that (1) during the past 50 years, the average total water supply (TWS) was 271.88 × 108 m3/y, and the average total water demand (TWD) was 467.85 × 108 m3/y; both the volume of water supply and demand was decreased in the LADB, with rates of −1.87 × 108 m3/y and −15.59 × 108 m3/y. (2) percentages of the rainfall in TWS were increased due to the decrease of inflow from the Amu Darya River; percentage of agriculture water demand was increased obviously, from 11.04% in the 1970s to 44.34% in 2010s, and the water demand from ecological sector reduced because of the Aral Sea shrinking. (3) the supply and demand of water resources of the LADB were generally in an unbalanced state, and water demand exceeded water supply except in the 2010s; the water scarcity index decreased from 2.69 to 0.94, indicating the status changed from awful to serious water scarcity. A vulnerable balanced state has been reached in the region, and that water shortages remain serious in the future, which requires special attention to the decision-makers of the authority.

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“…It used to be the world's fourth-largest lake but has shrunk over the past few decades [48]. The water supply for the Aral Sea is dependent on the Amu Darya and Syr Darya Rivers, which are the two major tributaries of the Aral Sea Basin [37,[49][50][51]. These two rivers originate from the Pamirs and Tian Shan Mountains and run through the territory of Central Asia and Afghanistan [52,53].…”

Section: Study Area and Vegetation Inventory Datamentioning

confidence: 99%

Analysis of NDVI Trends and Driving Factors in the Buffer Zone of the Aral Sea

Cui

Zheng

et al. 2023

Water

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A buffer zone can be used to analyze the influence of the lake on the surrounding spatial elements, which is of great significance for discussing the problems of lake retreat, vegetation degradation, and overall environmental deterioration in the Aral Sea. Taking the 3 km buffer zone of the Aral Sea as the research area, the spatiotemporal variation characteristics and main influencing factors of the Normalized Difference Vegetation Index (NDVI) in the Aral Sea research area were studied using remote sensing over 31 years (1987, 1997, 1992, 2007, 2010, 2014, 2015, 2017, and 2018). The results showed that the vegetation growth in the Aral Sea buffer zone deteriorates with the retreat of the lake; the vegetation of the small Aral Sea began to recover due to the stable water volume and salt content of the lake; vegetation began to grow in the west coast of the West Aral Sea; the shrinkage of the Aral Sea caused by human activities is an important factor affecting the growth of the vegetation. This study provides a reference for the restoration and reconstruction of regional vegetation.

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Quantitative Detection and Attribution of Groundwater Level Variations in the Amu Darya Delta

Cited by 12 publications

References 44 publications

Spatial and Temporal Evolution Characteristics and Sustainability Analysis of Groundwater in a Typical Inland River Oasis Irrigation Area

Spatial and Temporal Evolution Characteristics and Sustainability Analysis of Groundwater in a Typical Inland River Oasis Irrigation Area

Analysis of the Water Demand-Supply Gap and Scarcity Index in Lower Amu Darya River Basin, Central Asia

Analysis of NDVI Trends and Driving Factors in the Buffer Zone of the Aral Sea

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