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Device for rising up, back flowing or compressing fluids.

Structure linking two points separated by a stream, a valley or any other obstacle.

Mean annual cumulative rainfall at a given location.

Accumulated precipitation height at a location over a given period.

A term that characterises high intensity rainfall events occurring over a short period of time, and of low occurrence in both time and space.

A 24-hour cumulative precipitation height at a given location.

Cumulative rainfall height at a location during a month.

Pressure exerted to any body, surrounded by the atmosphere, by the weight of the column of air situated above it. The average atmospheric pressure at sea level is 760 mm of mercury. This pressure decreases with altitude.

Value representing the force applied by water on a surface. We distinguish the hydrostatic pressure, exerted by water at rest, from the dynamic pressure, linked to a movement of water.

Anticipation of phenomena that may cause or aggravate health, economic or environmental problems. Risk prevention aims to eliminate or reduce the probability of occurrence of hazardous phenomena at the origin of the risk.

Travel of rising water levels from upstream to downstream of a watercourse.

Protocol for the Protection of the Mediterranean Sea against Pollution from Land-Based Sources adopted on 17 May 1980 in Athens and entered into force on 17 June 1983. The Athens Protocol was modified by amendments adopted on 7 March 1996 in Syracuse. The agreement is now entitled "Protocol for the protection of the Mediterranean Sea against pollution from land-based sources and activities".

All the private pipes, buried or not, located outside the house, between the sanitary (bathroom, toilet) or household appliances (sink, laundry tray...) and the junction manhole.

Reuse of sewage sludge, especially in agriculture (composting, land application) or in industry (cement, for example).

Way in which the fluid particles move together during a flow.

Rehabilitation of a network of drinking water supply, sanitation or of degraded industrial fluid. The rehabilitation of a network contributes to restore optimal conditions for its exploitation

Restructuring of an artificialised area, possibly a fallow land, in order to make it practicable and attractive for residents while integrating it into the landscape.

Action to dispose of, discharge or allow the flow of runoff water (mainly from rainfall) and wastewater (produced by human activities) into the sewers of a city.

Work or the lifting of fill materials, generally intended to ensure the continuity of level for a structure.

Rising of the groundwater level or of the piezometric surface due to a recharge after depletion.

Volume of water consumed by users (private, industrial and other) and the public utility (for the management of the drinking water system) in relation with the volume of drinking water introduced into the supply system.

A structure for the storage of water taken from the natural environment before its supply to a system. Water reservoirs are a buffer between water supply and demand.

Corrective action to improve the quality of groundwater.

Exceeded limits lead to restrictions of use and water withdrawal, to cope with a shortage of water resources during low water periods. Restriction measures are defined locally by the prefects. Generally, measures to limit withdrawals are progressive (depending on the thresholds defined for vigilance, alert, quick reaction alert or crisis) and adapted to different uses (domestic, agricultural, industrial).