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http://dx.doi.org/10.5389/KSAE.2005.47.5.003

Estimation of Seawater Intrusion Range in the Daechang Area Using 3D-FEMWATER Model  

Kim Kyoung-Ho (충북대학교 토목공학과)
Park Jae-Sung (충북대학교 토목공학과)
Lee Ho-Jin (북대학교 토목공학과)
Youn Ju-Heum (충북대학교 토목공학과)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.47, no.5, 2005 , pp. 3-13 More about this Journal
Abstract
The present study examined the 3 dimensional space distribution characteristics of sea water intrusion using data available from previous observations. For this study, we used 3D FEMWATER, which is a 3 dimensional finite element model. The target area was around Daechang-ri, Gimje-si, Jeollabuk-do. The area is relatively easy to formulate a conceptual model and has observation wells in operation for surveying sea water intrusion. Considering the uncertainty of numerical simulation, we analyzed sensitivity to hydraulic conductivity, which has a relatively higher effect. According to the result of the analysis, the variation of TDS concentration had an error range of $-1,336{\~}+107 mg/{\iota}$. Taking note that the survey data from observation wells were collected when the boundary between fresh water and sea water in the aquifer was in equilibrium, we set the range of time for numerical simulation and estimated the spatial distribution of TDS concentration as the range of sea water intrusion. According to the result of estimation, the spatial distribution of TDS concentration calculated when 1,440 days were simulated was taken as the range of sea water intrusion. Using the result of calculation, we can draw not only vertical views for a certain section but also horizontal views of different depth. These views will be greatly helpful in understanding the spatial distribution of the range of sea water intrusion. In addition, the result of this study can be used rationally in proposing an optimal quantity of water pumping through investigating the moving route of sea water intrusion over time in order to prevent excessive water pumping and to maintain an optimal number of water pumping wells per interval.
Keywords
Seawater intrusion; Total Dissolved Solids (TDS); Hydraulic conductivity; Sensitivity; 3D-FEMWATER;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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