BASED ON THE ELECTROMAGNETIC PROPERTIES TO DETECT THE DISASTER DUE TO LEAKAGE IN URBAN UNDERGROUND WATER PIPE

There are many ground collapses and other geological disasters due to leakages of urban underground water pipes. Through finite difference method for specific leak location and extend of the electromagnetic field leakage, the variation of electromagnetic wave field leakage are analyzed. The root mean square amplitude attribute analysis utilized severity can better identify pipeline leaks, especially for the pipe and a large area of the pipeline leaks better recognition. Combined with sweetness property, suppress multiple wave interference effects, to better identify the specific location and leakage extent in supply pipes or drainage. It is good method to distinguish large area leaking in supply pipes or drainage using divider attribute technology. By combination of three different properties, some effective methods to detect leakage disaster in urban underwater pipes using ground-penetrating radar are proposed.