59846

Balanço hídrico climatológico da cultura da cana-de-açúcar via sensoriamento remoto em Santo Antônio de Goiás-Go

Favoritar este trabalho

The climatic water balance is an important tool for agricultural planning and can also be adjusted to monitor the deficit and surplus water for purposes of irrigation. For its preparation, there is need for input and output of water in the system, rainfall and evapotranspiration, respectively, as well as plant and soil data. This study aimed to compare the water balance of the culture of sugarcane cultivation in Santo Antônio de Goiás, using estimated rainfall data and evapotranspiration by remote sensing with the water balance made via automatic weather station data. The study was conducted in sugarcane ratoon cycle, 2014/2015 crop in rainfed crop. The rainfall data were obtained from satellite TRMM algorithm 3B42 Version 7, evapotranspiration was estimated by SAFER algorithm by means of the satellite Landsat 8 images and precipitation records were obtained from the meteorological station of EMBRAPA - Rice and Beans located in San Antonio municipality Goias. To calculate the water balance was used the methodology proposed by Thornthwaite and Mather. Rainfall estimated by TRMM showed Pearson correlation of 0.96, concordance index of 0.91. In the rainy season the ET ranged from 2.07 to 4.41 mm and the dry period showed variability from 1.13 to 3.17 mm. The estimate of the actual daily evapotranspiration by SAFER algorithm and precipitation by satellite TRMM 3B42 Version 7 are promising tools for monitoring and timeline planning large areas of agricultural production.