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Groundwater Depleti...
Groundwater Depletion Estimated from GRACE: A Challenge of Sustainable Development in an Arid Region of Central Asia
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- Hu, Z. Y. (författare)
- University of the Chinese Academy of Sciences
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- Zhou, Q. M. (författare)
- Hong Kong Baptist University
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- Chen, X. (författare)
- University of the Chinese Academy of Sciences
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- Chen, Deliang, 1961 (författare)
- University of Gothenburg,Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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- Li, J. F. (författare)
- Hong Kong Baptist University
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- Guo, M. Y. (författare)
- Hong Kong Baptist University
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Yin, G. (författare)
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- Duan, Zheng (författare)
- Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science,Technical University of Munich
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(creator_code:org_t)
- 2019-08-15
- 2019
- Engelska.
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Ingår i: Remote Sensing. - : MDPI AG. - 2072-4292. ; 11:16
- Relaterad länk:
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https://www.mdpi.com...
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http://dx.doi.org/10... (free)
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https://gup.ub.gu.se...
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https://doi.org/10.3...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Under climate change and increasing water demands, groundwater depletion has become regional and global threats for water security, which is an indispensable target to achieving sustainable developments of human society and ecosystems, especially in arid and semiarid regions where groundwater is a major water source. In this study, groundwater depletion of 2003-2016 over Xinjiang in China, a typical arid region of Central Asia, is assessed using the gravity recovery and climate experiment (GRACE) satellite and the global land data assimilation system (GLDAS) datasets. In the transition of a warm-dry to a warm-wet climate in Xinjiang, increases in precipitation, soil moisture and snow water equivalent are detected, while GRACE-based groundwater storage anomalies (GWSA) exhibit significant decreasing trends with rates between-3.61 +/- 0.85 mm/a of CSR-GWSA and -3.10 +/- 0.91 mm/a of JPL-GWSA. Groundwater depletion is more severe in autumn and winter. The decreases in GRACE-based GWSA are in a good agreement with the groundwater statistics collected from local authorities. However, at the same time, groundwater abstraction in Xinjiang doubled, and the water supplies get more dependent on groundwater. The magnitude of groundwater depletion is about that of annual groundwater abstraction, suggesting that scientific exploitation of groundwater is the key to ensure the sustainability of freshwater withdrawals and supplies. Furthermore, GWSA changes can be well estimated by the partial least square regression (PLSR) method based on inputs of climate data. Therefore, GRACE observations provide a feasible approach for local policy makers to monitor and forecast groundwater changes to control groundwater depletion.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Nyckelord
- groundwater variation
- terrestrial water storage
- GRACE
- GLDAS
- arid region
- sustainable
- climate-change
- data sets
- evapotranspiration
- precipitation
- variability
- irrigation
- regression
- xinjiang
- river
- Arid region
- Groundwater variation
- Sustainable development
- Terrestrial water storage
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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