Econ. Environ. Geol. 2010; 43(2): 149-162

Published online April 30, 2010

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Geological Structures and Their Relation to Groundwater System around K-1 Oil Stockpile

Sang-Ho Moon1, Young-Seog Kim2, Kyoochul Ha1*, Chong Ho Won3 and Jin-Yong Lee4

1Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM)
2Department of Earth Environmental Sciences, Pukyong National University
3Korea Water Resources Corporation (K-Water)
4Department of Geology, Kangwon National University

Correspondence to :

Kyoochul Ha

hasife@kigam.re.kr

Received: January 22, 2010; Accepted: April 20, 2010

Abstract

The most serious problem in oil stockpiles with artificial underground cavern is maintaining the stability of ground water system. In order to understand the ground water system around K-1 site, we determined the regional flow direction and level distribution of groundwater, and investigated the major geologic factors influencing their flow system. Reactivated surface along the contact between granite and gneiss, and fractures and faults along the long acidic dyke may contribute as important pathways for groundwater flow. Within K-1 site, groundwater level fluctuation is closely related to the rainfall events and injection from surface or influx water. In this project, the effect of groundwater pumping from the southern wells was examined. Based on equations relating water level drawdown to pumping rate at those wells, their pumped outflow of groundwater ranged from 80 m3/day to less than 250 m3/day. The modeling results with MODFLOW imply that the previous groundwater pumping at distance of 1.2 km may not affect the groundwater level variations of the K-1 site. However, continuous pumping work at quantity over 250 m3/day in this area will be able to affect the groundwater system of the K-1 site, particularly along the acidic dyke.

Keywords K-1 stockpile, groundwater flow and fluctuation, geological factor, acidic dyke

Article

Econ. Environ. Geol. 2010; 43(2): 149-162

Published online April 30, 2010

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Geological Structures and Their Relation to Groundwater System around K-1 Oil Stockpile

Sang-Ho Moon1, Young-Seog Kim2, Kyoochul Ha1*, Chong Ho Won3 and Jin-Yong Lee4

1Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM)
2Department of Earth Environmental Sciences, Pukyong National University
3Korea Water Resources Corporation (K-Water)
4Department of Geology, Kangwon National University

Correspondence to:

Kyoochul Ha

hasife@kigam.re.kr

Received: January 22, 2010; Accepted: April 20, 2010

Abstract

The most serious problem in oil stockpiles with artificial underground cavern is maintaining the stability of ground water system. In order to understand the ground water system around K-1 site, we determined the regional flow direction and level distribution of groundwater, and investigated the major geologic factors influencing their flow system. Reactivated surface along the contact between granite and gneiss, and fractures and faults along the long acidic dyke may contribute as important pathways for groundwater flow. Within K-1 site, groundwater level fluctuation is closely related to the rainfall events and injection from surface or influx water. In this project, the effect of groundwater pumping from the southern wells was examined. Based on equations relating water level drawdown to pumping rate at those wells, their pumped outflow of groundwater ranged from 80 m3/day to less than 250 m3/day. The modeling results with MODFLOW imply that the previous groundwater pumping at distance of 1.2 km may not affect the groundwater level variations of the K-1 site. However, continuous pumping work at quantity over 250 m3/day in this area will be able to affect the groundwater system of the K-1 site, particularly along the acidic dyke.

Keywords K-1 stockpile, groundwater flow and fluctuation, geological factor, acidic dyke

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

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