Correction of Empirical Equations Known as “Strickler-Type” for the Calculation of the Manning’s Roughness Coefficient for Costa Rica’s Northern Pacific Conditions
Abstract:When using numerical models for hydraulic simulations of rivers, calibration is key to be able to reflect accurately the interaction of water flow in the channel and to make it resemble what is observed. In this study, a calibrated two-dimensional hydraulic model was created for two control paths located in the Ahogados and Tempisquito rivers. Paths were analyzed morphologically from a grain-size analysis and the different roughness coefficients were calculated through a numerical model using the empirical equ… Show more
“…The contributions of Serrano-Núñez et al and Negatu et al [5,6] are undertaken at the scale of river reaches/sections. The former presents the calibration of the roughness coefficient in two-dimensional hydro-dynamic models of two short reaches of the Ahogados and Tempisquito rivers in Costa Rica.…”
Most of the global population lives in developing countries that are highly prone to hydrological phenomena (such as monsoons, floods, cyclones, droughts, aridity, etc [...]
“…The contributions of Serrano-Núñez et al and Negatu et al [5,6] are undertaken at the scale of river reaches/sections. The former presents the calibration of the roughness coefficient in two-dimensional hydro-dynamic models of two short reaches of the Ahogados and Tempisquito rivers in Costa Rica.…”
Most of the global population lives in developing countries that are highly prone to hydrological phenomena (such as monsoons, floods, cyclones, droughts, aridity, etc [...]
En este artículo se presenta la estimación de la resistencia al flujo en río de montaña por tres métodos. Se aplicaron los criterios estadísticos del error medio cuadrático (RMSE), el coeficiente de determinación (R2) y el diagrama de Taylor en el software R para la calibración de los modelos. El modelo GEP resultó óptimo para estimar el n de Manning con el menor error de 5%, pero presenta mayores limitaciones y sesgo en relación al HEC-RAS con similar error. En efecto, se desarrollaron nuevas ecuaciones para estimar el n de Manning para ríos de montañas. En relación con el método más factible y confiable para elaboración de mapas de riesgos hidrometeorológicos se demostró que estará en función del grado de la precisión y limitaciones del tipo de investigación.
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