All physical and biological phenomena (water, erosion, etc), and their interactions within the river system or hydrosystem. Thus the great diversity of plant and animal communities (Living communities) is expressed only by river dynamics (alternating low and high-flow levels, deposits and erosion, etc). These phenomena are influenced by the different uses and can contribute to meet the latter.
Natural or agricultural floodplain (not currently urbanized), that can be extended to floods whose occurrence is higher than the hundred-year flood, as part of a hydrogeomorphical approach. When local stakes require it (level of hazards, areas considered important, etc), floodplains, which, at the date of approval of the river basin management plan (SDAGE), are classified "to be urbanized" but are not yet highly urbanized, may be considered, for their part not yet urbanized, as areas for flood storage purpose.
Development potential of electricity generation processes in hydropower plants.