Fourier Correlations of Dam Horizontal Movements Time Series

Abstract

Time deformations monitoring of Drăgandam is done by physically methods (i.e. inversependulum) and topographically methods (i.e.optoelectronic). The two deformations measuringsystems, built up by these two methods, are different.The existence of different conclusions drawn fromthese deformations reveals the correlationimportance of the two deformation systems. If thereis a correlation then the deformations valuesdifferences will be provided by measuring errors; ifthe correlation is not present then the deformationsvalues differences will be provided by coarse errors.This paper is intended to identify theproblems from the presented systems, that provideswrong deformations and to exclude them.Fourier analysis [1-3] is used to generatethe correlations of deformations measured by thesetwo different methods. There are presented both timecorrelations for 1D deformations of singlemeasuring point, named (1D along H) correlation,and time correlations for vertical blocs of measuringpoints (i.e. plots) of the dam, named (2D+t)correlation.

Keywords

• time series
• Fourier correlation