In order to check the stability of monitored points previously selected and materialized downstream of the Mauá hydroelectric plant dam, located in Tibagi river, between the cities of Ortigueira and Telêmaco Borba, state of Paraná, the 3D irradiation topographic method was held to determine the coordinates of these points. The study of the monitored point behavior is given by the comparison of their coordinates, between two or more distinct epochs. For this, it was established a geodetic network materialized by concrete pillars, equipped with a system of forced centering and constructed so that the foundation reached the rocks of the region. These were monitored using GNSS techniques where it was found stability, then serving as reference for monitoring points irradiated. After different surveys campaigns carried out before and during the formation of the reservoir, it was used an application in MatLab environment, developed for the purpose of this project, where analyses and corrections were done in the data obtained. Thereafter, the three-dimensional coordinates from monitored points were calculated. The results show the variation of the coordinates using the first campaign of surveying, made before the reservoir formation, as a reference.
Monitoring Structures; Geodesic Surveys; Three-dimensional Irradiation
