New　analytical　solutions　of　pore-water　pressure　(PWP)　distributions　in　a　vegetated　multi-layered　slope　are　derived　considering　the　effects　of　roots　on　water　permeability.　PWP　distributions　are　significantly　affected　by　root-induced　reductions　in　water　permeability　due　to　increases　in　the　root　volume　ratio　(R　v　).　Under　drying　conditions,　negative　PWP　increases　with　R　v　.　The　negative　PWP　induced　by　root　water　uptake　increases　with　the　desaturation　coefficient　(α　i　)　or　the　ratio　of　the　transpiration　rate　to　saturated　water　permeability　(T　p　/k　si　).　As　the　overall　water　permeability　underneath　the　vegetation　layer　decreases,　the　negative　PWP　induced　by　root　water　uptake　increases.　©　2018　Elsevier　Ltd