Hazard zone of the PPR flood of COURPIERE(63DDT20070010) approved on 07-12-2010 — Puy-de-Dôme

Hazard maps determine flooded areas in terms of perimeter and flood intensity. Three levels of hazard (low, medium and strong) are defined according to the physical parameters of the flood that can translate in terms of severity for people and damage to property. These parameters are water heights and flow velocities: — severe hazard, for water heights exceeding 1 metre, and/or flow velocities exceeding 1 metre per second, — mean hazard for heights of water between 0,5 and 1 m and speeds of less than 1 meter per second, or speeds between 0,5 and 1 m per second and heights of less than 1 m, — low hazard for water heights less than 0,5 metres, and speeds of less than 0,5 metres per second. The intensity of the hazards is linked to the mobility of people according to the water height and the flow velocities.