Research on dam seepage detecting based on EH-4

This paper analyzes the signal spectral leak problem of continuous conductivity imaging system of EH-4 after Fourier transform of signals adopted from field surveying under different frequency, which influences the data quality. On the base of analyzing and understanding the characteristics and function of different window functions, combined with the analysis and interpretation on the data during the detection of dam leak, the spatial locations of dam seepage are determined, which provides the scientific proof on purdah grouting.