Evaluación de los productos Tropical Rainfall Measuring Mission (TRMM) y Global Precipitation Measurement (GPM) en el modelamiento hidrológico de la cuenca del río Huancané, Perú
DOI:
https://doi.org/10.17268/sci.agropecu.2018.01.06Keywords:
modelamiento hidrológico, productos satelitales, Altiplano peruano, IMERG, modelo GR4J.Abstract
El objetivo de esta investigación fue evaluar los productos grillados de precipitación de la Tropical Rainfall Measuring Mission (TRMM) y de la Global Precipitation Measurement (GPM), en el modelamiento hidrológico en la cuenca del río Huancané, del Altiplano peruano. Al comparar la precipitación media diaria de los productos 3B42RT, 3B42V7 e IMERG respecto a la lluvia media diaria de la cuenca (abril 2014 – diciembre 2015), IMERG representa mejor los patrones de precipitación (R2: 0,38) pero no cuantifica adecuadamente la intensidad (BIAS: -32%). El producto 3B42V7 capta muy bien la intensidad de lluvia en contraste con el 3B42RT que presenta elevadas sobrestimaciones. Una evaluación de estos productos sin corregir en el modelo hidrológico GR4J, evidencia que, el producto 3B42V7 es la mejor opción para la estimación de las descargas en periodos de avenida. Sin embargo, al realizar la corrección del sesgo al promedio de IMERG, las estimaciones de lluvia mejoran (R2: 0,9; BIAS: -10,1%), en consecuencia, IMERG corregido sería el mejor producto de precipitación. Estos resultados preliminares están limitados al análisis de un corto periodo, sin embargo, a medida que se liberan más datos del IMERG, serán necesarios más estudios que exploren su utilidad en aspectos de hidrología y cambio climático.References
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Received October 30, 2017.
Accepted February 11, 2018.
Corresponding author: cramost@lamolina.edu.pe (C. Ramos).
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