A spillway on a flood control dam is designed to pass a flood with an exceedance probability of 0.015. About how often will a flood of this magnitude or larger occur on this watershed? What is the risk that the spillway will fail at least once in 100 years?
It is desired to design a hydraulic structure to a standard such that its risk of failure will be no greater than 5% in a time period of 50 years. What will be the exceedance probability and recurrence interval of the design discharge?
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