• Analysis of Groundwater Level Changes Due to Earthquake in Jeju Island (For the Indonesian Earthquake with Magnitude 7.7 in 2010)
  • Lee, Soo-Hyoung;Hamm, Se-Yeong;Ha, Kyoo-Chul;Kim, Yong-Cheol;Cheong, Beom-Keun;Ko, Kyung-Seok;Koh, Gi-Won;Kim, Gee-Pyo;
  • Korea Institute of Geoscience and Mineral Resources;Division of Earth Environmental System, Pusan National University;Korea Institute of Geoscience and Mineral Resources;Korea Institute of Geoscience and Mineral Resources;Korea Institute of Geoscience and Mineral Resources;Korea Institute of Geoscience and Mineral Resources;Water Resource Headquarter, Jeju Special Self-Governing Province;Water Resource Headquarter, Jeju Special Self-Governing Province;
  • 지진에 의한 제주도 지하수위 변동 분석 (2010년 인도네시아 규모 7.7 지진)
  • 이수형;함세영;하규철;김용철;정범근;고경석;고기원;김기표;
  • 한국지질자원연구원;부산대학교 지구환경시스템학부;한국지질자원연구원;한국지질자원연구원;한국지질자원연구원;한국지질자원연구원;제주특별자치도 수자원 본부;제주특별자치도 수자원 본부;
Abstract
This study was conducted to investigate the relationship between groundwater level change and a large earthquake using the data of groundwater and seawater intrusion monitoring wells in Jeju Island. Groundwater level data from 13 observation wells were analyzed with a large earthquake. The Earthquake occurred at Sumatra, Indonesia (Mw = 7.7) on 13 June 2010, and groundwater level anomalies which seems to be related to the Earthquake were found in 6 monitoring wells. They lasted for approximately 16~27 minutes and the range of groundwater level fluctuations were about 1.4~2.4 cm. Coefficient of determination values for relationship between groundwater level change and transmissivity, and response time were calculated to be $R^2$ = 0.76 and $R^2$ = 0.96, respectively. The study also indicates that the high transmissivity of aquifer showed the high goundwater level changes and longer response time.

Keywords: Earthquake;Groundwater level change;Jeju Island;Transmissivity;Indonesian earthquake;

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