100-year Flood
A one-hundred-year flood is calculated to be the level of flood water expected to be equaled or exceeded every 100 years on average. The 100-year flood is more accurately referred to as the 1% annual exceedance probability flood, since it is a flood that has a 1% chance of being equaled or exceeded in any single year. Similarly, a flood level expected to be equaled or exceeded every 10 years on average is known as a ten-year flood. Based on the expected flood water level, a predicted area of inundation can be mapped out. This floodplain map figures very importantly in building permits, environmental regulations, and flood insurance.
Read more about 100-year Flood: Probability, Statistical Assumptions, Probability Uncertainty, Upslope Factors, Downslope Factors, Prediction
Famous quotes containing the word flood:
“Men hold themselves cheap and vile; and yet a man is a fagot of thunderbolts. All the elements pour through his system: he is the flood of the flood, and fire of the fire; he feels the antipodes and the pole, as drops of his blood: they are the extension of his personality.”
—Ralph Waldo Emerson (1803–1882)