Hydromorphology

Strip of natural vegetation located along a river, and which differs from the surrounding matrix, including the river bank, the floodplain and part of the alluvial terraces. The presence of a stream or wood is not enough to make corridors. It is their conduction function that defines them. At the regional level, the riparian corridor appears to be a relatively uniform area (line of trees). At the local level, sedimentary and hydrological constraints provide variability of conditions resulting in a mosaic of habitats. The corridor is a transition zone between the water system and terrestrial system. Thus,…

Natural environment (land, water or air) for connection between areas of ecological interest, thus ensuring the movement, dispersion of species and allowing them to exploit these areas according to their needs and stabilize their populations in the best way possible. The "Grenelle for the Environment" requests to stop the loss of biodiversity, particularly by setting up a network of ecological corridors called "green belt" and "blue belt".

For a river, to ensure the free movement of species (in particular fishes) and the smooth flow of sediments.

Is defined by the free circulation of biological species and good flow of natural river sediment transport. The concept of ecological continuity did not take sediment transport into account until the Water Act of 2006.

Deposit of fine particles in the interstices of a porous medium (soil) with the effect of decreasing its permeability. The intensity of silting can be variable: "Nil" if there is no silting, "Low" if there is partial silting on one type of substrate alone (gravel, sand), "Medium" if the silting does not affect all habitats or "High" if the silting is widespread.