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State of the soil or of an environment resulting from a lack of rain. It generally occurs when the amount of rain is significantly lower than seasonal norms, and this over a fairly long period.
A type of drought corresponding to a pronounced and prolonged deficit of precipitation.
A type of drought characterized by a water deficit in the surface soils (between 1 and 2 m deep), sufficient to alter the good development of vegetation.
Type of drought affecting water levels in environments: lakes, rivers or groundwater show abnormally low levels. It depends on precipitation but also on the state of the soil affecting runoff and infiltration.
Simplified urban planning document that a municipality can be provided with if it has no local urbanisation plan (PLU) or a document replacing it; the municipal map determines how the general rules of the national urban planning law can be applied, and is defined in Articles L. 124-1 and the following ones, of the urban planning code. It can affect part or the entire municipality territory. It can also be developed at the level of an inter-municipal structure. Municipal maps must be compatible or made compatible, within three years, with the basic guidelines of a sound water resources management and water quality and quantity objectives, defined by the river basin management plans (SDAGE) as well as with the protection goals defined by the sub-basin management plans (SAGEs).