PROPUESTA DE CALIBRACIÓN DE UN MODELO PARA EL TRÁNSITO DE CRECIENTES EN UN TRAMO DEL RÍO MEDELLÍN
PROPUESTA DE CALIBRACIÓN DE UN MODELO PARA EL TRÁNSITO DE CRECIENTES EN UN TRAMO DEL RÍO MEDELLÍN
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En este artículo se presenta la metodología seguida en la calibración del modelo NWS-FLDWAV para el tránsito de crecientes en un tramo del río Medellín. Para la construcción del modelo se recopiló la información topográfica del tramo seleccionado del río y de las hidrógrafas de nivel registradas por las estaciones limnigráficas. A partir del análisis del comportamiento de las crecientes escogidas, se identificó la importancia de considerar los aportes de caudal a lo largo del tramo, los cuales surgen de la escorrentía directa causada principalmente por la precipitación. Se determinó una forma para calibrar el modelo a partir del coeficiente de rugosidad de Manning y del caudal de aporte en el tramo. Este caudal se obtuvo del análisis de la diferencia entre caudales base para las dos estaciones limnigráficas que limitan el tramo y se simuló con una distribución espacial y temporal.
Abstract: This paper presents the methodology used to calibrate an NWS-FLDWAV model for flood routing through a stretch of the Medellín river. To build the model, the topographic information of the selected river section was compiled as soon as the stage hydrographs registered in the gauge stations. The importance of considering the discharge contributions along the stretch, which arise from the direct run-off caused essentially by the precipitation, was identified through the analysis of the behavior of the chosen floods. A way to calibrate the model was discovered that included the Manning coefficient of frictional resistance and the contribution discharge. This discharge was obtained from the analysis of the difference between base discharges for the two measurement stations that limit the river segment and were simulated with a spatial and temporal distribution.
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