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Retention basin

Updated on 06/09/2018
Définition
Sens technique
A storm management basin for the temporary storage of runoff water to protect homes and structures during periods of heavy rain.
Source
according to the Intermunicipal Sanitation Syndicate of the Enghien-les-Bains region

Climatology

Updated on 04/12/2018
Définition
Sens commun
Study of the action of meteorological phenomena on different parts of the planet, of their mutual reactions, of their temporal evolution, and of different climates.
Source
according to the Robert dictionary

Pluviometry

Updated on 06/09/2018
Définition
Sens commun
Study of precipitations, their nature (rain, snow, soft hail, fog), their distribution and the techniques used for their measurement. Rainfall, with the distribution of Earth's temperature, conditions terrestrial climates, the nature and functioning of ecosystems and their primary productivity. It is one of the factors conditioning the development of human societies.
Source
according to Wikipedia

Stormwater drainage from waterproofed surfaces

Updated on 19/06/2018
Définition
Sens commun
All the techniques and facilities for controlling stormwater flow and water runoff by retention or infiltration or for taking care of the collection, possible storage and, if necessary, the stormwater and runoff-water treatment when the pollution they bring to the aquatic environment may seriously impair the effectiveness of sanitation systems. Indeed, rainwater by running off on waterproofed surfaces (roofs, roads, storage areas, etc), may carry pollutants (organic matters, heavy metals, hydrocarbons, etc).
Source
According to Rhine-Meuse Water Agency

Stormwater overflow

Updated on 19/06/2018
Définition
Sens commun

Runoff driving matters accumulated on waterproofed surfaces of a farm (loafing sheds/pens, herd crossing areas, manure storage areas, etc), when no arrangement is made to collect these flows.

Source
According to Rhine-Meuse Water Agency

Flood forecasting service

Updated on 13/07/2018
Définition
Sens technique
Service in charge of predicting hazardous situations caused by heavy floods, in partnership with Météo-France. The flood forecasting Service (SPC) warns the Prefect in case of alarm and prepares the information to be disseminated to the mayors. The Civil Protection Service of the prefecture is in turn responsible for alerting the mayors by suitable means and providing them with the information developed by the
Source
According to Rhine-Meuse Water Agency

Separate system

Updated on 13/07/2018
Définition
Sens commun
A sanitation system formed by two separate systems, one for wastewater and one for stormwater. This is a common system since the 1970s, only the wastewater system is connected to the treatment plant, the stormwater system usually discharging its waters into a watercourse.
Source
According to the Ministry for the Environment and AFB

Average annual rainfall

Updated on 19/06/2018
Définition
Sens commun
Average rainfall over a year: it is obtained mostly by adding the average daily rainfalls of the year and dividing the result by the number of days in the year.
Source
According to AFB

Runoff water

Updated on 19/06/2018
Définition
Sens commun
Rainwater flowing on the ground.
Source
According to BRGM

Separated collecting

Updated on 19/06/2018
Définition
Sens technique

Collecting of separated domestic sewage in a system and stormwater in another. Separated collection has the advantage of avoiding the risk of sewage overflow into the environment when it rains. It allows better control of the pollution flow and concentration and better adapting the capacity of the wastewater treatment plants.

Source
According to Poitou-Charentes Regional Council

Combined sewer system

Updated on 13/07/2018
Définition
Sens commun
System discharging domestic wastewater and stormwater into the same sewers. The combined network adds the economic advantage (a sole system to build and manage) to simplicity (any connection error is excluded by definition), but requires the taking into account of abrupt changes in the flow of rainwater when designing and sizing collectors and treatment facilities.
Source
According to IOWater

Acid rain

Updated on 13/07/2018
Définition
Sens technique
Anthropogenic air pollutant which is dissolving in moist air and falling back in a liquid or solid form on plants, soils, water and minerals. It is called acid when its pH is less than 5.6. The main sources of these pollutants are: industry, thermal power stations, domestic heating and cars emitting sulphur dioxide and nitrogen oxides.
Source
According to Ifremer

Precipitation

Updated on 19/06/2018
Définition
Sens commun
Total volume of atmospheric precipitation, whether in the solid or liquid state (rain, snow, hail, fog, frost, dew, etc), usually measured by meteorological or hydrological institutes.
Source
According to Eurostat