FILL DAM CONTROL SYSTEM BY SPECIFIC RESISTANCE TOMOGRAPHY METHOD AND ITS CONTROL METHOD

PROBLEM TO BE SOLVED: To control a dam inexpensively over a long term with a simple configuration. SOLUTION: A temperature sensor 6 for detecting the temperature of a fill dam 3 and electrodes Pa1-Pan and Pb1-Pbn for detecting specific resistance are buried into the fill dam 3 in advance when the fill dam 3 (4, 3A) is to be constructed by obtaining the relationship among the specific resistance and each physical property of temperature, gap ratio, and saturation by an experiment in advance and acquiring the basic elements for analysis and abnormality judgment. After the fill dam 3 is completed, temperature data that is collected from the temperature sensor 6 being buried into the fill dam 3 and potential data that is measured by an electrical prospecting device 2 are processed by a computer 5 for creating a temperature distribution and a specific resistance distribution with time, then the created physical property distribution and specific resistance distribution are compared based on a relation expression that is obtained by an experiment in advance, it is judged whether the change in the specific resistance distribution is abnormal or normal based on the comparison, and an abnormal site is detected according to the region of the specific resistance region when it is judged to be abnormal.