Evaluación de productos satélite de precipitación y temperatura para la determinación de caudales en la cuenca alta del río Paute

Abstract

The research focused on evaluating different satellite products (SP) of precipitation (SPP) and temperature (SPT) for hydrological modeling processes and estimating flows in the upper area of the Paute river basin, which contemplate the sub-basins; Tomebamba, Tarqui and Yanuncay. The SP were collected on a daily time scale, then PS were filtered based on the utility for the study area. As a result, the products selected were ERA5-LAND as SPT and CHIRPS, IMERG, PERSIANN-CCS, PERSIANN-CCS-CDR, PDIRNOW, ERA5-LAND and MSWEP as SPP. The observed hydrometeorological data were obtained from gauge network with 8 stations (five for precipitation data, two for temperature data and three for river discharge data) on a daily scale provided by ETAPA-EP. Initially, these SP data were used for a statistical validation and the results indicated that; the SP with the best approximation to reality are MSWEP and ERA5-LAND, followed by the PERSIANN products and IMERG. Subsequently, the simulation of the flow for each sub-basin was carried out in the HBV-LIGHT software using each SP. In addition, the automatic calibration was based on Monte Carlo and GAP simulations. Results showed low efficiencies, due to different considerations such as; SP re-analysis, HBV-LIGHT structure, evapotranspiration and the availability of observed data. Finally, it is proposed for future research work to improve the quality of SP and ground stations through; downscaling, spatial interpolation, integration of multiple meteorological networks and use of other hydrological models that are mostly specialized in the region.