The 100 Year Flood

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The 100 Year Flood

A one-hundred-year flood is a flood event that has a 1% probability of occurring in any given year.

Being able to characterize flood risks is a crucial job of civil engineers. Engineering hydrology has equal parts statistics and understanding how society treats risks.

Sometimes there’s not enough water, like in a drought or just an arid region, but we also need to be prepared for the times when there’s too much water, a flood. Rainfall and streamflow have tremendous variability and it’s the engineer’s job to characterize that so that we can make rational and intelligent decisions about how we develop the world around us. 

Source: Practical Engineering

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