Fig. 2: Impacts of global tree restoration on hydrological fluxes in selected river basins.

a,b, Mean wetness index (ratio of precipitation to potential evaporation; a) and tree-restoration potential (b) for each river basin. c, The change in streamflow (ΔQ) with evaporation recycling. The dots indicate the mean river-basin change in streamflow, and the bars indicate one standard deviation (the variation over the six Budyko models). d, The change in evaporation (ΔE, in green) and precipitation (ΔP, in blue). The green bar indicates the increase in evaporation without evaporation recycling, and the green line indicates the increase in evaporation with evaporation recycling (the increase in evaporation when taking into account the increased precipitation). The river basins are sorted from the lowest to the highest decrease in streamflow. The river-basin boundaries are taken from ref. ³¹.