방조제 누수지점 탐지를 위한 SP 및 단극배열 전기비저항탐사의 적용

• 발행기관: 대한자원환경지질학회
• 저자명: 송성호 이규상 김진호 권병두
• 간행물 정보: 『자원환경지질』33권 5호, 417~424쪽, 전체 8쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 2000.10.30

영문 초록

We applied SP monitoring and resistivity surveys using the pole-pole electrode array to seawater leakage problems in the Youngsan estuary dam and the Eoeum embankment to estimate and detect the zone of seawater leakage. The embankment is generally affected by tidal variation and has low resistively characteristics due to the high saturation of seawater. For this reason, SP monitoring and the pole-pole array resistivity surveys, which are relatively more effective to the conductive media, were carried out to delineate the leakage zones of sea water through the embankment. We checked out electrical conductivity (EC) and temperature variations alonf the inner part of Youngsan estuary dam to detect the zone of seawater leakage and found that the measured EC value agree to that of seawater in the leakage zone and the temperature was lower than that of the vicinity of leakage zone. SP monitoring results were coincided with tidal variations at each embankment. At the leakage zones in the Youngsan estuary dam and the Eoeum embankment, SP anomalies are in the range of -60∼-85 mV and -20∼-50 mV, respectively, and true resistivity values obtained by 2-D inversion are 3∼15 ohm-m and below 0.3 ohm-m, respectively. Both SP monitoring and the pole-pole array resistivity method are found to be quite effective for investigation of seawater leakage zones in the embankment.

키워드

누수지점 단극배열 전기비저항 탐사 SP 모니터링 유동전위 조석변화 leakage problems pole-pole array resistivity surveys SP monitoring tidal variation electrical conductivity