Action to establish and/or manage a set of facilities on the river or in the river basin to reduce variations in the hydrological regime of a river (significant low-flow, flash flood, etc).
Maximum bed occupied by a stream in which water flows only temporarily when the minor bed overflows during very high-flow periods (especially in the largest historical flood). Its outer limits are determined by the largest historical flood. The floodplain of the river allows the storage of overflowing waters. There is also a mosaic of habitats for many species. These habitats are also called "water dependent habitats"
Controlled evacuation of part of the water of a dam reservoir (low-flow period, security, energy production, etc.).