It is called aggravation the geological process through which accumulate sediments in a depressed surface. In this way, the aggravation, with the filling of these types of areas, tends to level the surface.
Aggravation is the third stage of gradation, which begins with the degradation of the land (by means of the erosion). Then the transport of the sediments and finally the instance of aggravation arrives.
What gratification does, in short, is contribute to filling a depression. This is possible from the deposition of sediments in the bed of a riverbed, for example.
As a process that occurs within the framework of fluvial dynamics, aggravation implies the development of a surface flat due to sedimentation. In this case we speak of river aggravation.
If the current of a river can no longer carry all the sediments, aggravation occurs. It is usually a consequence of an increase in the volume of sediments or a fall in the flow. When the current has less carrying capacity, aggravation appears.
It is important to note that degradation and aggravation occur naturally periodically from changes in sediment and flow rates. The dynamics, however, can be affected by the actions of the human being. Building a damTo mention a possibility of intervention, it modifies the circumstances in which degradation and aggravation occur.
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