100årsöversvämning
100årsöversvämning, which translates to "100-year flood" in English, is a term used in hydrology and flood risk management to describe a flood event that has a 1% probability of occurring in any given year. This means that, on average, such a flood is expected to happen once every 100 years. It is important to understand that a 100-year flood does not mean a flood of this magnitude will occur precisely every 100 years. It is a statistical probability, and multiple 100-year floods could theoretically occur within a shorter timeframe, or a much longer period could pass without one.
The concept of a 100-year flood is a common benchmark used in many countries for planning, building
Climate change and changes in land use can alter the frequency and intensity of floods, potentially making