Hidden defects such as anthills

cracks

and leakage can adversely affect the safe operation of earth dikes. The use of high-density electricity method to regularly detect hidden defects of dikes and dams is effective. Therefore

understanding the response characteristics of DC electric field of hidden defects inside earth dikes is a prerequisite for the interpretation of geophysical survey results and the identification of hidden defect types

which is of great significance. In this paper

the finite element numerical simulation software is used to establish models of common hidden defects

such as anthills

cracks

 and leakage

and the abnormal characteristics of different hidden defects on the high-density electrical inversion profile are studied. Moreover

this result is applied to the hidden defect detection of a reservoir in Henan province

which is proved to be effective.