Defined model
Exceed a 1% annual flood threshold
- Probability:
- 1%
- Odds:
- 1 to 99
- dBan
- −20 dBan
At the defined location, the threshold has one modelled annual exceedance for every 99 years without one, on average. The 1% annual chance does not promise one flood every 100 years.
Calculation
p = 0.01 for the defined location, threshold, and year
Assumptions
The threshold belongs to a particular location. Homes and waterways at other locations have different risks.