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The normal or temporary status of the soil or environment, corresponding to a water shortage, over a significantly long period so that it causes impacts on natural or cultivated flora, wildlife or livestock.
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.
Low flow value below which the supply of drinking water for essential needs for human and animal life, and for the survival of the species found in the environment, are endangered. At this low-flow level, all possible measures to restrict consumption and
Period of lowest water levels in streams and groundwater (usually summer for rainfall regimes).
Exceptionally low flow period of a watercourse, or exacerbation of its low water (sometimes assimilated to low seasonal flows). Low water is therefore considered to be a limited period in the year when the flows drop lower than a statistically calculated threshold value, function of each stream.