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Long-term trends in human-induced water storage changes for China detected from GRACE data
Shanshan Hua1, Hao Jing2, Guoyu Qiu3
1School of Earth System Science, Tianjin University, Tianjin, China; Eastern Institute for Advanced Study, Eastern Institute of Technology, Ningbo, China.
Journal of Environmental Management
|August 22, 2024
Summary
China is experiencing a decline in Terrestrial Water Storage (TWS) due to climate change and human activities. Future projections indicate increased water resource challenges, emphasizing the need for conservation.
Area of Science:
- Hydrology
- Environmental Science
- Climate Change Studies
Background:
- Terrestrial Water Storage (TWS) is crucial for assessing surface and groundwater resources.
- Understanding TWS dynamics is vital for effective water resource management.
Purpose of the Study:
- To investigate TWS changes in China from 2003-2023, driven by human activities.
- To forecast future TWS trends under climate change and development scenarios.
Main Methods:
- Analysis of TWS data from 2003-2023.
- Modeling future TWS trends using climate change and development scenarios.
Main Results:
- A consistent decline in China's TWS observed since 2003, averaging 1.36 mm annually.
- TWS fluctuations range ±10 mm seasonally and annually.
- Projected increased water supply-demand disparities in Songliao, Southwest, and Yangtze basins (2024-2030).
Conclusions:
- Climate change and human activities (irrigation, industrial, domestic use) are primary drivers of TWS decline.
- Future water resource management requires prioritizing water conservation, especially during wet seasons.
- Sustainable water resource planning is essential to address intensifying supply-demand conflicts.
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