Análisis comparativo de la precipitación mensual en la cuenca Catamayo en el sur del Ecuador, usando productos de precipitación satelital y datos de estaciones meteorológicas.

Abstract

Abstract: The study of precipitation distribution in mountainous areas is challenging due to the climatic variability and the low density of meteorological stations. The objective of this research was to evaluate two freely available SPPs regarding the amounts and distribution of monthly precipitation, and to improve the original SPPs by applying adjustment equations considering the different climatic regions. This study used the SPPs of (i) Chirps V2.0 (5 Km) and (ii) Persiann-CCS (4 Km), which were evaluated in comparasion with observations from 24 weather stations. Four quantitative statistical indices (KGE, R, PBIAS, MAE) were used to evaluate the accuracy of the SPPs. The results showed that the original SPPs estimate the amount of monthly precipitation adequately to some extent (Chirps V2.0: KGE = 0.68 - 0.72, Persiann-CCS: KGE = 0.42 - 0.43), although with notable underestimations, particularly in the rainy season. The application of the adjustment equations improved both SPPs concerning amounts and distribution of monthly precipitation (Chirps V2.0: KGE = 0.77 - 0.78, Persiann-CCS: KGE = 0.50 - 0.55)