"Threshold" value of the flow that triggers the first restrictions for some activities. These measures are taken at the initiative of the prefectural authority in connection with a crisis cell and in accordance with a crisis plan. Below this threshold, one of the functions (or activities) is compromised. To partially restore this function, it is necessary to limit temporarily another: withdrawal or discharge (first restriction measures). In case of the situation worsening, additional restriction measures are gradually taken to avoid falling below the crisis discharge.
According to the Ministry for the Environment and AFB
Soumis au comité de relecture.