Proceedings of the Korean Society of Soil and Groundwater Environment Conference (한국지하수토양환경학회:학술대회논문집)
- 1998.11a
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- Pages.76-80
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- 1998
Parameter estimation for identification on cause of drawdown around underground LPG storage cavern
지하 LPG저장공동 주변의 지하수위 강하 원인규명을 위한 파라미터추정
- Han, Il-Yeong (R & D Center, SK Engineering and Construction Co., Ltd.) ;
- Lee, Dae-Hyuck (R & D Center, SK Engineering and Construction Co., Ltd.) ;
- Lee, Jung-Eun (R & D Center, SK Engineering and Construction Co., Ltd.) ;
- Jung, Kwang-Pil (Engineering & Maintenance Sec., SK Gas Co., Ltd.)
- Published : 1998.11.01
Abstract
In order to identify the cause of ground water drawdown of a piezometer installed around the LPG storage cavern, parameter estimations were conducted by inverse and forward numerical models. An inverse model, SK-EST developed by SK Engineering & Construction Co., Ltd.(SKEC,1997) was performed to estimate the change of the hydraulic conductivity. It was verified by the commercial forward model, AQUA3D (VATNASKIL,1995). The simulation results showed that the hydraulic diffusivity of the rock mass between the piezometer and the cavern had been increased and the change rate of the hydraulic head had been abruptly increased in response to the change of the operation pressure. Finally the statistical analysis for observed data showed the increase of the change rate of the hydraulic head and thus proved the applicability of SK-EST.