Dry 5-year flow
Définition
Sens technique
Monthly flow with a 4/5 probability of being exceeded every year. It allows characterizing a calendar month with low hydraulicity.Source
According to SCHAPI
Watercourse
Wet 5-year flow
Définition
Sens technique
Monthly flow with a 1/5 probability of being exceeded every year. It allows characterizing a calendar month with high hydraulicity.Source
According to SCHAPI
Depth of runoff
Définition
Sens commun
Amount of water measured on a level surface and expressed as height.
Source
according to IOWater
Sens technique
A flow rate value expressed in mm. The depth of runoff is obtained by dividing a runoff volume at a measuring station by the surface of the drainage basin at the station; it is most commonly expressed in mm, which allows comparing it to the rainfalls which cause it.
Source
according to SCHAPI
Specific flow
Définition
Sens technique
Flow per surface unit of the drainage basin usually expressed in litres/seconde/km2. It allows making comparison between watercourses in different river basins.Source
According to SCHAPI
Monthly mean flow
Définition
Daily mean flow
Définition
Sens technique
Ratio between the volume of the flow for a full day (0-24 hours) and the corresponding duration. This volume is calculated by using the record of instantaneous flow rates. If the flow is expressed in m3/s, the volume is calculated in m3 and the duration in sec.Source
According to SCHAPI
Catchment area
Définition
Sens commun
Area from which rainwater flows into a river, a body of water or a reservoir.
Source
According to the Ministry for the Environment and OFB
substrate
Définition
Sens commun
Any material used to be a physical carrier for organisms.Source
Restoration
Définition
Sens commun
Action of enabling the return to the previous status of an ecosystem degraded by neglect, or the purposive control of human action.Source
According to the Ministry for the Environment and OFB