Evaluation of Precipitation and Evapotranspiration Obtained by Remote Sensing With Meteorological Stations in the State of Goiás

Abstract

The measures of precipitation and evapotranspiration can be realized by means of meteorological predictors or by meteorological satellites. Both types have advantages and disadvantages. Emission is one of the most important climatic parameters for a region’s socioeconomic and environmental formation, while evapotranspiration is more important for global and local climate mediators. The objective of this work was to analyze the comparative form of the rainfall satellite data through the TRMM and evapotranspiration satellite, by the MODIS satellite, with surface data, that is, of meteorological demarcations, distributed in the State of Goiás, in the years of 2012 and 2013. The monthly measurements were taken in meteorological stations (automatic and conventional), distributed and representative in the State of Goiás. Data collection of the stations was done through the INMET website. The data of the TRMM satellite were obtained from the LAPIG-MAPS platform, developed by the Laboratory of Image Processing and Geoprocessing of the Federal University of Goiás (LAPIG/UFG), for the generation of the quarterly maps for the year 2012 and 2013. The high regression between the data of the surface meteorological stations and the data of TRMM satellite for the year of 2012 and 2013 allows to affirm a high reliability to the orbital data. The evapotranspiration data present low correlation between satellite data (MOD16) and surface stations. Still, this information evidences high potentiality and availability of information in large spatial and temporal scale.

Monitoramento da superfície do solo usando indicadores ambientais provenientes de dados de satélite em órbita geoestacionária

“…A precipitação mensal (mm) foi obtida a partir de produto 3A26 do TRMM (Tropical Rainfall Measuring Mission), que corresponde à precipitação mensal total para o período de um mês com resolução espacial de 5º, obtidos pelo site do GPM (Global Precipitation Measurement) da NASA (National Aeronautics and Space Administration). Os produtos deste satélite apresentam alta correlação com dados de estações meteorológicas de superfície para no estado de Goiás (Quirino et al, 2017;Moraes et al, 2019). O TRMM foi uma missão conjunta entre a NASA e a JAXA (Agência Japonesa de exploração Aeroespacial) projetado para monitorar e estudar as chuvas tropicais, disponibilizando dados no período de 1997 a 2015 (GPM, 2020).…”

Remote sensing in the detection of hotspot occurrences in the southern region of Goiás

“…Remote sensing has found extensive application across various domains due to its cost-effectiveness and rapid information acquisition. Examples of such applications include mapping degraded pastures through vegetation indices (Sousa & Giongo, 2022), mapping and quantifying pivot-irrigated areas , identifying land uses for soil and water conservation (Peixoto et al, 2022), assessing precipitation and evapotranspiration on a spatial scale (Moraes et al, 2019), mapping land use changes in flooded areas , characterizing pasture quality via vegetation indices (Giongo et al, 2022) (2020). This region stands as the state's primary area for sugarcane activities, alongside agricultural crops, pastures, and remnants of natural vegetation.…”