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Int. J. Environ. Res. Public Health 2016, 13(5), 467; doi:10.3390/ijerph13050467

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

Department of Resources Engineering, National Cheng Kung University, Tainan City 701, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Yu-Pin Lin
Received: 22 November 2015 / Revised: 17 April 2016 / Accepted: 23 April 2016 / Published: 4 May 2016

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. View Full-Text
Keywords: GMS system; groundwater flow; contamination transport GMS system; groundwater flow; contamination transport
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Chen, C.-S.; Tu, C.-H.; Chen, S.-J.; Chen, C.-C. Simulation of Groundwater Contaminant Transport at a Decommissioned Landfill Site—A Case Study, Tainan City, Taiwan. Int. J. Environ. Res. Public Health 2016, 13, 467.

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