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. 2023 Oct 21;14:6674. doi: 10.1038/s41467-023-42411-2

Fig. 2. Temporal trend of groundwater recharge ratio (%), i.e., ratio of recharge to precipitation, in Iran from 2002 to 2017.

Fig. 2

The countrywide groundwater recharge ratio declined from 21% in 2006 to 14% in 2017, averaging ~17% during the study period, closely approximating the average groundwater recharge ratio at the global scale (i.e., 16%).