A geodetic deformation monitoring program for a buttress dam

A modern deformation monitoring program established for a reconstructed buttress dam is presented. A brief overview of the monitoring program will be provided with discussions on equipment calibration and the quality assessment of the observation data. Methods to verify the stability of the deformation network and ways to establish a trend of the deformations will be outlined. The development of deformation models, which accurately reflect the motions of the structure in time and space, are provided. Also included are comments on an ongoing investigation into the use of the Global Positioning System (GPS) for monitoring the deformations.