Flash Flood 11
Flash Flood 11 : Flood of short duration with a relatively high peak discharge (UNESCO/WMO 2007). Alternatively, a flash flood can be defined as a flood that threatens damage at a critical location in the catchment, where the time for the development of the flood from the upstream catchment is less than the time needed to activate warning, flood defence or mitigation measures downstream of the critical location. Thus with current technology even when the event is forecast, the achievable lead-time is not sufficient to implement preventative measures (e.g. evacuation, erecting of flood barriers) (ACTIF 2004)
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