Using this plot of annual peak discharge, what is the probability each year that a flood of 1,000 cubic meters per second will occur?





A) 1 in 1,000, or 0.01%

B) 1 in 100, or 1% (100-year flood)

C) Between 10% and 20%

D) More than 20%


C) Between 10% and 20%

Environmental & Atmospheric Sciences

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