Explain the curve number method of direct runoff estimation. Compute potential maximum retention if curve number (CN) is 80.
The SCS-CN method is based on the water balance equation and two fundamental hypotheses. The first hypothesis equates the ratio of the actual amount of direct surface runoff (Q) to the total rainfall (P) (or maximum potential surface runoff) to the ratio of the amount of actual infiltration (F) to the amount _____ _______ ___ ___ ________ __________ ______ ____.
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