oa Geodetic monitoring of the protective dam of the Lviv MSW landfill after reconstruction

The main purpose of the work is the geodetic monitoring of the protective dam of the lakes of the filtrates of the Lviv MSW Landfill after reconstruction, as well as the analysis and interpretation of the obtained results. In order to achieve this goal, four cycles of geodetic monitoring of the reconstructed protective dam were conducted from May to August, 2018. A geodetic network, which consisted of 2 base and 18 monitoring points, was created for monitoring. To determine the coordinates of the points, a complex of GNSS and linear-angular measurements with using modern geodetic instruments was performed. The processing of the results was performed in specialized geodetic software. On the basis of the determined coordinates of the points of the geodetic network, horizontal and vertical displacements of the points on the reconstructed protective dam in each measurement cycle were calculated, their schemes were constructed and analyzed. For analysis and interpretation of the reconstructed protective dam deformation processes, the transformation from the calculated vectors of horizontal and vertical displacements of points to their average linear velocities over a given period, as well as to the dilation parameter, was made, and schemes of their distribution were constructed. It is established that, the maximum velocities of vertical displacement are identified at the edges of the reconstructed protective dam, while the minimum velocities are at the center; the central part of the reconstructed protective dam is characterized by an increase in the area, that is, expansion; the northern and southern parts of the reconstructed protective dam are characterized by a decrease in area, that is, compression.