RAINFALL ANALYSIS USING CHIRPS DATA AND GOOGLE EARTH ENGINE
DOI:
https://doi.org/10.14393/RCG2510172626Abstract
The present study compared precipitation data estimated by CHIRPS to data observed at terrestrial meteorological stations, on a monthly temporal scale, and aimed to understand the spatial variability of data quality in the North of Minas Gerais mesoregion. A computer routine was also developed using the Google Earth Engine (GEE) platform for spatio-temporal analysis of CHIRPS data on a regional and municipal scale, as well as in watersheds. The CHIRPS data was extracted using the geographic coordinates of each INMET/ANA station, through an implementation (script) in Google Colab, obtaining the monthly rainfall values for the pixel coinciding with the geolocation of each station. Also in Google Colab, metrics were implemented to compare the observed and estimated data. The routine developed (PluvCHIRPS-V1) has four modules, structured through object-oriented programming with the JavaScript language in the GEE Code Editor. Given the results found and the low density of terrestrial meteorological stations in the study area, the CHIRPS dataset is recommended as an alternative source of meteorological data. The computational routine is intuitive, fast, and automated, with great potential for analyzing rainfall time series at different scales (municipal and regional).
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Copyright (c) 2024 Luiz Pedro de Oliveira Mendes, Mariana Rodrigues Magalhães Romeiro, Lucas Jesus Leal Pimenta, Willer Fagundes de Oliveira, Silvânio Rodrigues dos Santos
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