Efficiency of remote sensing applied to the management and monitoring of irrigated agriculture - a bibliographic review

Because of climate change and the rapid growth of irrigated agriculture, intelligent management of water resources in agricultural areas is necessary. Even though it is the sector that least wastes water, agriculture uses between 69% and 87% of the world's fresh water, it is fundamental to map evapotranspiration and the coefficient of cultures in the present day, through remote sensing, helping in the management of resources to estimate the amount of water used by each crop, making its use intelligent and without waste. The present work consisted in the bibliographical survey on the applications of remote sensing and its efficiency in the monitoring and mapping of the variables evapotranspiration and crop coefficients, important for irrigation management. It was observed that the use of spectral information from thermal sensors of medium and high spatial resolution can provide consistent results for the estimation of evapotranspiration, since the satellite images have specific information for each pixel.