However, in recent years, due to China's great importance on the protection of groundwater, the amount of groundwater extraction has decreased, and the amount of groundwater resources has shown an increasing trend [ 21 ].
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China's groundwater situation in 2011-2020: Dynamic evolution, Influencing Factors, and sustainable development.
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In 2012, 2016 and 2020, China's groundwater resources were relatively large, and 2011–2015 showed a trend of increasing first and then decreasing.
In this context, research on the characteristics of space-time changes in groundwater depth is not only practically significant for the development and use of national water resources but also crucial to China's economic development and ecological civilization construction.