Variação volumétrica de aterro sanitário por meio de levantamento topográfico convencional e técnicas de aerofotogrametria

Abstract

Environmental monitoring of landfills involves a set of processes that aim, among them, to identify possible problems. In view of this, the use of technologies that make it possible to study and improve these actions, becomes indispensable. Therefore, this study aims to quantify the volume reduction of landfill using conventional topographic survey and aerophotogrammetry techniques. The methodological procedure used was based on the survey by conventional topography and aerophotogrammetry techniques, with the use of a total station and an Unmanned Aerial Vehicle (UAV) in conjunction with the Google Earth Pro and PhotoScan Pro software for monitoring, during the period from November 2019 to October 2020. Through the results obtained it can be seen that Cell 1 suffered a volumetric reduction of 49,072.68 m³ using conventional topography and 50,066.52 m³ using aerophotogrammetric techniques. The calculation of volume using digital aerophotogrammetry by UAV is a product with high precision since the difference in the volumetric reduction of Cell 1 calculated by the aerophotogrammetric technique was only 993.84 m³ when compared to the conventional topographic survey. It was verified, therefore, that the UAV technology allows a practicality of volumetric survey in relation to the conventional topographic method, where the volumetric variation between the methods was considered minimal (2%) evidencing an efficient survey, speed in obtaining the result and creating a high resolution orthophoto from ASCG. The regression model was significant at 95% confidence, and the hypothesis of using volume reduction models to estimate the useful life time in landfills with semi-arid conditions could be raised.