Flood frequency analysis based on:
Correct answer: D. All of the above
- A. Flood data of past is collected and arranged in descending order
- B. Ranking of observation is carried out
- C. Probability of occurrence of certain flood is known
- D. All of the above
Explanation
Frequency analysis ranks historical flood peaks, usually from largest to smallest, and uses their rank and record length to estimate recurrence probability. Hence all listed steps are involved.
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