Calibration of Manning’s roughness in non-instrumented rural basins using a distributed hydrological model

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Abstract

The purpose of this research work was to calibrate the Manning's roughness coefficient in rural non-instrumented basins using a distributed hydrological model. The process consisted of the selection of several basins with vegetal cover of forests and grasslands, and its subsequent experimental numerical study, in which the hydrological response hydrograph of each reference basin was obtained from the HEC-HMS software and the hydrograph to be calibrated was the Iber software, which is a hydrodynamic model based on the two-dimensional Saint Venant equations, solved by the finite volume method. Once the calibration process was carried out, the roughness coefficients with the best fit for each basin were identified with increases in precipitation, identifying the limitations of these values and the standard model used.

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Caro-Camargo, C. A., Pacheco-Merchán, O. F., & Sánchez-Tueros, H. P. (2019). Calibration of Manning’s roughness in non-instrumented rural basins using a distributed hydrological model. DYNA (Colombia), 86(210), 164–173. https://doi.org/10.15446/dyna.v86n210.72506

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