v notch weirv shaped valleyvacuumvacuum concretevacuum deaeratevacuum dewateringvacuum filtervacuum gaugevacuum processed concretevacuum pumpvacuum saturationvadose watervalleyvalley boardvalley cross sectionvalley floorvalley glaciervalley guttervalley of a roofvalley raftervalley springvalley storagevalley trainvaluevalvevalve chambervalve housevalve stem packingvalve teevanvane apparatusvane shear testvanishing pointvaporvapor barriervapor movementvapor pressurevapor tensionvapor transfer coefficientvaportightvariabilityvariable actionvariable cross sectionvariable flowvariable loadvariable message signvariable moment of inertiavariable radiusvariable radius arch damvariable stress