A general formula is presented to simplify many existing methods of hydrologic frequency analysis. It is shown that the methods differ only in the definition of the frequency factor contained in the formula. The derivation of the formula is simple, and does not require familiarity with advanced mathematics and statistics. The application of the formula is practical so that it provides a valuable tool for the hydrologic design of hydraulic structures.
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Ven Te Chow (1951) studied this question.
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