Simulation of Groundwater Contaminant Transport at a Decommissioned Landfill Site—A Case Study, Tainan City, Taiwan

Chao-Shi Chen, Chia-Huei Tu, Shih-Jen Chen and Cheng-Chung Chen
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Chao-Shi Chen: Department of Resources Engineering, National Cheng Kung University, Tainan City 701, Taiwan
Chia-Huei Tu: Department of Resources Engineering, National Cheng Kung University, Tainan City 701, Taiwan
Shih-Jen Chen: Department of Resources Engineering, National Cheng Kung University, Tainan City 701, Taiwan
Cheng-Chung Chen: Department of Resources Engineering, National Cheng Kung University, Tainan City 701, Taiwan

IJERPH, 2016, vol. 13, issue 5, 1-22

Abstract: Contaminant transport in subsurface water is the major pathway for contamination spread from contaminated sites to groundwater supplies, to remediate a contaminated site. The aim of this paper was to set up the groundwater contaminant transport model for the Wang-Tien landfill site, in southwestern Taiwan, which exhibits high contamination of soil and groundwater and therefore represents a potential threat for the adjacent Hsu-Hsian Creek. Groundwater Modeling System software, which is the most sophisticated groundwater modeling tool available today, was used to numerically model groundwater flow and contaminant transport. In the simulation, the total mass of pollutants in the aquifer increased by an average of 72% (65% for ammonium nitrogen and 79% for chloride) after 10 years. The simulation produced a plume of contaminated groundwater that extends 80 m in length and 20 m in depth northeastward from the landfill site. Although the results show that the concentrations of ammonium nitrogen and chlorides in most parts are low, they are 3.84 and 467 mg/L, respectively, in the adjacent Hsu-Hsian Creek.

Keywords: GMS system; groundwater flow; contamination transport (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2016
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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