subgeostrophic windsubheadsubhumidsubirrigationsublimationsubmeandersubmerged hydraulic jumpsubmerged measuring weirsubmerged orificesubmerged parshal flumesubmergencesubnormal pressuresubpermafrost watersubpolar lowsubsequentsubsidencesubsidence inversionsubsidence velocitysubsoilsubsoil flowsubsoilingsubstitutionsubsurface flowsubsurface runoffsubsurface sealingsubsurface storm flowsubsurface velocitysubsurface watersubterranean cloversubterranean watersubtropical highsubtropical regionsubtropical zonesubwatershedsuccessivesuction scoursuddsudden injectionsuden expansionsullagesumatrasummation curve of soil particlesummer solsticesumpsunradiationsunshinesunshine recordersunspotsuper coolingsuper permafrost water
