Sensitivity of Empirical Equation Parameters for the Calculation of Time of Concentration in Urbanized Watersheds

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dc.contributor.authorEcheverri Díaz, Jamilton
dc.contributor.authorCoronado Hernández, Óscar E.
dc.contributor.authorGatica, Gustavo
dc.contributor.authorLinfati, Rodrigo
dc.contributor.authorMéndez Anillo, Rafael D.
dc.contributor.authorCoronado Hernández, Jairo R.
dc.date.accessioned2023-08-24T15:10:30Z
dc.date.available2023-08-24T15:10:30Z
dc.date.issued2022-09
dc.descriptionIndexación: Scopus.es
dc.description.abstractThe time of concentration is the time it takes a drop of water in a basin to travel from the most distant point to the outlet, and is one of the most important parameters, along with the morphometric characteristics, for determining the design flow rate in rainfall-runoff models. This study aims to determine the sensitivity of the parameters included in different equations for the calculation of the time of concentration. A case study was conducted on small, urbanized watersheds in the city of Montería, Colombia. The study uses information obtained through field work using GPS equipment and electronic total station, supplemented by geographic information contained in the city drawings of the local sewage company, which includes data on elevations above sea level with sub-metric precision. The time of concentration determined by the 12 empirical equations was compared to the results obtained from the equation proposed by the Natural Resources Conservation Service (NRCS), which was considered as a baseline formulation for the intricacy of calculation. Based on this comparison, it was found that the Carter equation is the one that best fits the results obtained from the NRCS equation because it displayed highly significant goodness of fit values. Even though the equations by Kirpich, Ventura, California Culvert Practice, Simas-Hawkins and TxDOT provide a relatively good fit compared to other empirical equations, they tend to over-estimate time of concentration values, which could lead to the under-estimation of the design flow rates. For this reason, sensitivity analysis of the parameters of these equations represents an alternative for improving the calculation of the time of concentration. The current research analyses deepen the influence of some parameters in the estimation of time of concentration. The research can also be used by designers and engineers in the city of Montería, Colombia, as an important reference to compute time of concentrations in urbanized watersheds. © 2022 by the authors.es
dc.description.urihttps://www.mdpi.com/2073-4441/14/18/2847
dc.identifier.citationWater (Switzerland), Volume 14, Issue 18, September 2022, Article number 2847es
dc.identifier.doi10.3390/w14182847
dc.identifier.issn2073-4441
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/52794
dc.language.isoenes
dc.publisherMDPIes
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectLinear regression analysises
dc.subjectSensitivity analysises
dc.subjectTime of concentrationes
dc.subjectUrbanized watershedses
dc.subjectUSDA NRCSes
dc.titleSensitivity of Empirical Equation Parameters for the Calculation of Time of Concentration in Urbanized Watershedses
dc.typeArtículoes
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