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3. Important concepts relating to natural hazards
3.1 Natural processes or hazards
Natural phenomena (or hazards) have different physical characteristics, relating to notions of energy and duration, which can be grouped together under the general term of intensity. In a given geographical area, depending on the intensity considered, probabilities of occurrence related to reference durations can be associated with it. A notion of return period of the hazard, with this same intensity, can be defined; or, fixing a particular period, we can define the probabilities of occurrence of the hazard considered for different intensities.
Thus, in the field of lowland flooding, for a particular watercourse and in a well-defined geographical area, the hydrograph or other intensity parameters (water heights, flow velocities)...
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Important concepts relating to natural hazards
Natural hazards worldwide, risk management
Bibliography
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Regulations
Codes
The various codes whose articles come under the regulation of the prevention and repair of damage resulting from major foreseeable or unforeseeable risks:
– Code général des collectivités territoriales
– Code de l'expropriation pour cause d'utilité publique (French law on expropriation for public use)
– Environment Code
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Glossary and acronyms
Anthropic action: an act whose formation is essentially the result of human action.
Hazard: natural phenomenon of potentially dangerous occurrence and intensity.
Natural disaster: phenomenon or combination of phenomena whose effects are particularly damaging.
Risk basin: homogeneous geographical entity subject to the same natural phenomenon....
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