Econ. Environ. Geol. 2010; 43(4): 359-369

Published online August 31, 2010

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Characteristics of Aquifer System and Change of Groundwater Level due to Earthquake in the Western Half of Jeju Island

Soon-Il Ok1, Se-Yeong Hamm1*, Bong-Sang Kim2, Jae-Yeol Cheong3, Nam-Chil Woo4, Soo-Hyoung Lee1, Gi-Won Koh5 and Yun-Seok Park5

1Division of Earth Environmental System, Pusan National University, Busan 609-735, Korea
2Jinsan Engineering, Jeju Special Self-Governing Province 690-161, Korea
3Korea Radioactive Waste Management Corporation, Daejeon 305-353, Korea
4Department of Earth System Sciences, Yonsei University, Seoul 120-749, Korea
5Institute of Environmental Resources Research, Jeju Special Self-Governing Province 690-702, Korea

Correspondence to :

Se-Yeong Hamm

hsy@pusan.ac.kr

Received: July 9, 2010; Accepted: August 9, 2010

Abstract

This study characterizes aquifer system and hydrogeologic property in the western half of Jeju Island where wells were drilled for regional water supply in three sub-areas (northwestern, western, and southwestern sub-areas). The aquifer system of the northwestern sub-area is largely composed of upper high-permeability layer, upper low-permeability layer, lower high-permeability layer, and lower low- permeability layer. On the other hand, the aquifer systems of the western and southwestern sub-areas are mostly composed of upper low-permeability layer, highpermeability layer, and lower low-permeability layer. Transmissivity and specific capacity decrease in the order of
the northwestern, western, and southwestern sub-areas. The relationship between specific capacity and the top surface of tuff is negative with a high correlation coefficient of -0.848, indicating that the tuff acts as the bottom of the aquifer. Groundwater level change due to the 2004 Sumatra earthquake is an average of 23.74 cm in the northwestern sub-area, an average of 9.48 cm in the western sub-area, and none in the southwestern sub-area. Further, it is found that groundwater change due to the earthquake has a positive relationship with transmissivity and specific
capacity.

Keywords aquifer system, groundwater level, specific capacity, Jeju volcanic island, earthquake

Article

Econ. Environ. Geol. 2010; 43(4): 359-369

Published online August 31, 2010

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Characteristics of Aquifer System and Change of Groundwater Level due to Earthquake in the Western Half of Jeju Island

Soon-Il Ok1, Se-Yeong Hamm1*, Bong-Sang Kim2, Jae-Yeol Cheong3, Nam-Chil Woo4, Soo-Hyoung Lee1, Gi-Won Koh5 and Yun-Seok Park5

1Division of Earth Environmental System, Pusan National University, Busan 609-735, Korea
2Jinsan Engineering, Jeju Special Self-Governing Province 690-161, Korea
3Korea Radioactive Waste Management Corporation, Daejeon 305-353, Korea
4Department of Earth System Sciences, Yonsei University, Seoul 120-749, Korea
5Institute of Environmental Resources Research, Jeju Special Self-Governing Province 690-702, Korea

Correspondence to:

Se-Yeong Hamm

hsy@pusan.ac.kr

Received: July 9, 2010; Accepted: August 9, 2010

Abstract

This study characterizes aquifer system and hydrogeologic property in the western half of Jeju Island where wells were drilled for regional water supply in three sub-areas (northwestern, western, and southwestern sub-areas). The aquifer system of the northwestern sub-area is largely composed of upper high-permeability layer, upper low-permeability layer, lower high-permeability layer, and lower low- permeability layer. On the other hand, the aquifer systems of the western and southwestern sub-areas are mostly composed of upper low-permeability layer, highpermeability layer, and lower low-permeability layer. Transmissivity and specific capacity decrease in the order of
the northwestern, western, and southwestern sub-areas. The relationship between specific capacity and the top surface of tuff is negative with a high correlation coefficient of -0.848, indicating that the tuff acts as the bottom of the aquifer. Groundwater level change due to the 2004 Sumatra earthquake is an average of 23.74 cm in the northwestern sub-area, an average of 9.48 cm in the western sub-area, and none in the southwestern sub-area. Further, it is found that groundwater change due to the earthquake has a positive relationship with transmissivity and specific
capacity.

Keywords aquifer system, groundwater level, specific capacity, Jeju volcanic island, earthquake

    KSEEG
    Jun 30, 2024 Vol.57 No.3, pp. 281~352

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