Runoff Probability, Storm Depth, and Curve Numbers
- 1 December 1985
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Irrigation and Drainage Engineering
- Vol. 111 (4) , 330-340
- https://doi.org/10.1061/(asce)0733-9437(1985)111:4(330)
Abstract
Using existing antecedent moisture condition (AMC) Curve Number relationships, a general expression of rainfall‐runoff is developed for AMC I and AMC III. The probability distribution of event runoff exceeding zero is found to be lognormal. Relative storm size is then proposed to be defined on the ratio P/S, where a “large” storm has P/S>0.46, when 90% of all rainstorms will create runoff. Consequent problems arising in the definition of CN from rainfall‐runoff data are discussed.Keywords
This publication has 4 references indexed in Scilit:
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- Closure to “Empirical Investigation of Curve Number Technique”Journal of the Hydraulics Division, 1982
- Discussion of “Runoff Curve Numbers form Partial Area Watersheds”Journal of the Irrigation and Drainage Division, 1980
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