“…Water infiltration of atmospheric precipitation through the unsaturated zone to the groundwater is hydrologically defined as the direct recharge, and the indirect recharge is defined as recharge from mappable features such as rivers, canals, lakes and originates from remote areas (Scanlon et al, 2006;Healy, 2010). It is well known that groundwater recharge can be influenced by environmental factors, including climate change, underlying soil and geology, land cover and the growth in human population that affects withdrawal and economic development (Zhu et al, 2015(Zhu et al, , 2017. Among these environmental factors, climate and land cover largely determine precipitation and evapotranspiration, whereas the underlying soil and geology dictate whether a water surplus (precipitation minus evapotranspiration) can be transmitted and stored in the subsurface (Doll, 2008(Doll, , 2009Giordano, 2009).…”