Fig. 1. Mimetic diagram of column test device.
Fig. 2. Saturation degree of column test over time.
Fig. 3. Soil placement mimetic diagram.
Fig. 4. Variation of the permeability coefficient according to the change of bentonite content.
Fig. 5. Volumetric water content change of TDR (Bentonite 5%).
Fig. 6. Volumetric water content change of TDR (Bentonite 10%).
Fig. 7. Volumetric water content change of TDR (Bentonite 20%).
Fig. 8. Boring long of study area.
Fig. 9. Result value of each zone by HYDRUS-10.
Fig. 10. Groundwater contamination vulnerability by DRASTIC.
Fig. 11. Groundwater contamination vulnerability by improved DRASTIC.
Fig. 12. Coincide with the results measured in the field compared to the contamination vulnerability.
Table 1. Physical property of standard sand used in experiment
Table 2. Permeability coefficient equation
Table 3. Permeability coefficient of TDR-1 and TDR-2
Table 4. Variable value of soil hydraulic characteristic in study area
Table 5. Analysis results by cation and anion of bedrock groundwater
Table 6. Analysis results by cation and anion of alluvial groundwater
References
- Aller L., Truman B., Jay H.L., Rebecca J.P., and Glen H., 1987, DRASTIC: A Standardized system for evaluating ground water pollution potential using Hydrogeologic setting, USEPA-600/2-87-035
- Barry M.E., and Wayne L.M., 1990, A GIS-based approach to evaluating regional groundwater pollution potential with DRASTIC, Journal of soil and water Conservation, 45(2), p. 242-245
- Kang J.E. and Park, E.G., 2010, A Comparative Application of DRASTIC and SINTACS Models for The Assessment of Groundwater Vulnerability of Buyeo Area, Koean Society of Soil and Groundwater Environment, 15(5), 32-39
- Kim S.H., 2004, A Study on the improvement of a DRASTIC model for Groundwater vulnerability evaluation, MSc Thesis, Seoul National University of Technology
- Lee J.H., Cha, K.H., Nam, K.H, Song, J.Y., Jeong, G.C., 2015, Estimation method on groundwater contamination vulnerability considering surface-subsurface geological characteristics, The Journal of Engineering Geology, 102-103
- Merchant J.W, 1994, GIS-based groundwater pollution hazard assessment : A critical review of the DRASTIC model, photogrammetric engineering & remote sensing, 60(9), 1117-1127
- Ministry of Agriculture and Forestry, Korea Rural Community Corporation, 2000, Regional assessment and mapping of groundwater vulnerability to contamination for aquifers in Korea
- Ministry of Environment. 2011, Development of quantitative source control technique and ecosystem interaction model for groundwater contamination
- Simunek J, Genuchten M.T.V., and Sejna M., 2005, The HYDRUS-1D software package for simulating the one-dimensional movement of water, heat, and multiple solutes in variably-saturated media, University of California Riverside, California, 270p.