What is denudation

The process of breakage and separation of sediments and particles of the rocks from the rock surface is known as weathering, while the process of wearing away/ transportation of these sediments from the rock surface to the low lying areas is known as erosion. The process of weathering and erosion collectively are known as Denudation. Denudation is a complex procedure consisting weathering and  cycle of erosion including all types of erosion. 

Denudation = Weathering+Erosion

See detail of the weathering

See Detail of the Erosion