Runoff Probability, Storm Depth, and Curve Numbers

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 r...

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Bibliographic Details
Published in:Journal of irrigation and drainage engineering 1985-12, Vol.111 (4), p.330-340
Main Authors: Hawkins, Richard H, Hjelmfelt, Allen T, Zevenbergen, Adrian W
Format: Article
Language:English
Subjects:
ANALISIS ESTADISTICO
ANALYSE STATISTIQUE
Applied sciences
BASSIN VERSANT
Buildings. Public works
CATCHMENT HYDROLOGY
CUENCAS HIDROGRAFICAS
EAU DE RUISSELLEMENT
ESCORRENTIA
Exact sciences and technology
HIDROLOGIA
HYDROLOGIE
HYDROLOGY
LLUVIA
PLUIE
PROBABILITY ANALYSIS
RAIN
RUNOFF
Sewerage. Sewer construction
STATISTICAL ANALYSIS
TECHNICAL PAPERS
WATERSHEDS
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Summary: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.
ISSN:0733-9437
1943-4774
DOI:10.1061/(ASCE)0733-9437(1985)111:4(330)