| Title |
Numerical Study of Contaminant Pathway based on Generic-scenarios and Contaminant-based Scenarios of Vadose Zone |
| Authors |
장선우(Chang, Sun Woo) ; 김민규(Kim, Min-Gyu) ; 정일문(Chung, Il-Moon) |
| DOI |
https://doi.org/10.12652/Ksce.2019.39.6.0751 |
| Keywords |
오염부지 위해성평가;노출농도;수치모델;불포화대;지하수;토양오염물질;오염부지 Risk assessment;Exposed concentration;Numerical model;Unsaturated zone;Groundwater;Contaminant;Contaminated site |
| Abstract |
This study tested various assumptions that simplified the configuration of the numerical model for unsaturated zone's contaminant transport to simulate the pathway to exposed point. This study investigated the contaminant migration through in the pollutant exposure pathway of vadoze zone for risk assessment of the contaminated site. For the purpose, generic scenarios as well as contaminant-based scenarios were simulated using the numerical code for transport of the contaminant in the pathway. The finite-difference one-dimensional transport with adsorption and biodegradation were considered, and it also assumed that the initial concentration was also depleted over time. The results of the generic-scenario show that as the groundwater infiltration rate decreases, the longer the path from the source to the groundwater level, the lower the concentration at the point of inflow into the groundwater level. In particular, in the case of high biodegradation rate and rapid depletion of pollutant sources, statistically outliers were found in the simulated results and generic scenarios was good at prediction. |