Answer:
stream downcutting
Explanation:
River modeling or stream downcutting
Landscape form caused by river action, that is, from the waters of the drainage network of a river basin, which erode, transport and deposit sediments. The term ‘river’ is used as a convention, river modeling affects all drainage channels, whatever their size, from the smallest streams to the largest rivers in the world. In fact, although the effects on the landscape of large river basins tend to be the most spectacular, much of the knowledge of how river modeling occurs derives from the detailed study of small streams.
The main factors responsible for the formation and evolution of rivers and their modeling are erosion, sediment haulage and deposition. Rivers can modify the landscape, since the potential energy of the water is transformed, in its downward path, into kinetic energy responsible for erosion, transport and deposition.
