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Keywords = rainfall zonification

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19 pages, 1301 KB  
Article
Intensity-Duration-Frequency Curve for Extreme Rainfall Event Characterization, in the High Tropical Andes
by Diego Escobar-González, Mélany S. Singaña-Chasi, Juan González-Vergara, Bolívar Erazo, Miguel Zambrano, Darwin Acosta, Marcos Villacís, Mario Guallpa, Braulio Lahuatte and Diego H. Peluffo-Ordóñez
Water 2022, 14(19), 2998; https://doi.org/10.3390/w14192998 - 23 Sep 2022
Cited by 5 | Viewed by 6252
Abstract
In fields such as hydrology, meteorology, and civil engineering, the study of extreme precipitation events is useful to prevent rainfall related disasters. A widely-used practice to address such a problem is by using statistical inferences about precipitation intensity, duration and frequency (IDF). Despite [...] Read more.
In fields such as hydrology, meteorology, and civil engineering, the study of extreme precipitation events is useful to prevent rainfall related disasters. A widely-used practice to address such a problem is by using statistical inferences about precipitation intensity, duration and frequency (IDF). Despite of its great usefulness, the selection of the adequate data and methodology to characterize precipitation’s IDF in the urban area of high-altitude Andean cities remains an open issue for practitioners and decision makers. In this sense, the present paper develops an approach to schematically build the IDF curves for a sub-basin of the study case Andean city, Quito–Ecuador. The here-used data holds information from 12 meteorological stations. Then, the IDF curves are obtained by using both a parametrization followed by a Gamma distribution and a 3-parameter cumulative distribution function, also called mnp. Finally, the curve-fitting process is estimated numerically by adjusting the Sherman equation. Results (average R2=0.9) demonstrated that the framework is well-suited for the high-altitude regime. As a noticeable outcome, a novel spatial interpolation-based analysis is introduced, which enabled the identification of extreme rainfall events according to its duration. Full article
(This article belongs to the Special Issue Hydrometeorological Observation and Modeling)
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