6533b7cffe1ef96bd1259050
RESEARCH PRODUCT
A rational runoff coefficient for a revisited rational formula
Giorgio Baiamontesubject
Green-Ampt modelmedia_common.quotation_subject0208 environmental biotechnologyhydrological response02 engineering and technology020801 environmental engineeringRunoff coefficientHydrology (agriculture)rational formulahillslope scaleSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliApplied mathematicskinematic wave modelSimplicityrunoff coefficientWater Science and Technologymedia_commonMathematicsdescription
The Rational Formula (RF) is probably the most frequently applied equation in practical hydrology to compute the peak discharge, due to its simplicity and effective compromise between theory and data availability. Thus, after more than a century, the estimation of peak discharge through the RF is still an important and challenging issue in hydrology. The RF assumes response linearity and sometimes assumes that the return period does not depend on the runoff coefficient and neglects the time to ponding and the antecedent moisture condition. Moreover, the RF requires the critical duration of rainfall and the runoff coefficient to be estimated, both of which are highly controversial. This paper proposes an advanced RF that makes it possible to derive the peak discharge at the hillslope scale, where the above RF assumptions are mostly relaxed. Physically based runoff coefficient tables, which are not affected by subjectivity, are presented and application of the derived procedure is performed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-11-08 | Hydrological Sciences Journal |