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rainfall frequency
1. The probability distribution specifying the exceedance probability of different rainfall depths for a given duration (such as 1 hour, or a 24-hour day). The exceedance frequency is often reported as a return period (in years), which is the reciprocal of the annual exceedance frequency. 2. The expected number of times, during a specified time period, that a given precipitation depth will be exceeded.
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- Kevin Bowles
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