International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage



(4117) Flood risk
A measure of the seriousness of the flood hazard : 1 - The chance of experiencing a flood. Risk is usually expressed in terms of the return period of peak discharges, but velocities, sediment loads and depths are sometimes also used in identifying risk zones. An assessment of risk may also be based on the life and property exposed. 2 - The probability of an event multiplied by its consequences (such as event damages). This is equal to the expected value of damage, and is a concept used in risk analysis.

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