Fluvial process and watersheds dynamics

Abstract

Fluvial process on watersheds is controlled with a system of shallow hollows which form a dense network. They cover practically all the surface including the water-divide zone, which becomes but nominal under the conditions. Two qualitative levels of the fluvial process are distinguished, those are diffused and linear (concentrated). They are delimited by a distinct boundary which may change its position in lime: it moves towards the water-divide at the stage of ascending topographic evolution and towards valleys at the descending stage. The switch from one trend to another is due to a number of factors which account together for a complicated and controversial evolution of all the landforms and their elements.