Satellite-based precipitation (SBP) products with global coverage have the potential to overcome the lack of information in places where there are no rain gauges to perform hydrological analyses; however, it is necessary to evaluate the reliability of the SBP products. In this study, we evaluated the performance of the Climate Prediction Center morphing technique with corrected bias (CMORPH-CRT) product in 14 sites in Mexico. The evaluation was carried out using two approaches: (1) using categorical metrics that include indicators of probability of detection (POD), false alarm rate (FAR), critical success index (CSI), and frequency bias index (FBI); and (2) through statistical indicators such as the mean absolute error (MAE), root mean square error (RMSE), relative bias (RB), and correlation coefficient (CC). The analysis was carried out with two levels of temporal aggregation: 30 min and daily. The results indicate that the CMORPH-CRT product overestimates the number of precipitation events in most cases since FBI values greater than 1 in 78.6% of analyzed stations were obtained. Also, we obtained CC values in the range of 0.018 to 0.625, which implied weak to moderate correlations, and found that in all stations, the CMORPH-CRT product overestimates the precipitation (RB > 0).
Los canales de desvío y vertedores laterales en un río de planicie, derivan los flujos líquidos excedentes, reduciendo los niveles y evitando el desbordamiento de los cauces, lo que mitiga las inundaciones. El estudio tuvo el objetivo de determinar la tasa de sedimentos en suspensión por efectos de un vertedor lateral en un río de planicie. El funcionamiento de estas estructuras cambia el comportamiento del flujo líquido y de los sedimentos que transporta en suspensión, provocando cambios en la morfología e hidrodinámica del cauce. Se utilizó un perlador de flujo Doppler (ADCP) River Ray y un muestreador integral de sedimentos en suspensión US-DH59, para medir los flujos líquidos y sólidos en el río de la Sierra en el Estado de Tabasco, México y en el vertedor lateral El Censo. Los datos obtenidos en campo se utilizaron para evaluar los efectos del vertedor lateral sobre la hidrodinámica y morfología del cauce. Los resultados muestran que hay un incremento de 109.4% en la tasa de sedimentos en el flujo aguas abajo del vertedor y desequilibrio geomorfológico, lo que denotan una alteración al comportamiento natural del flujo bifásico compuesto por una fase de flujo líquido y otra de flujo de sedimentos.
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