Abstract
In this paper, we target long-term prediction of soil and groundwater contamination due to hexavalent chromium (Cr(VI)). On the basis of adsorption parameter of Cr(VI) on soil particles obtained by experimental work, history matching for long-term monitoring of Cr(VI) concentration in groundwater and the amount of Cr(VI) recovery by pumping was carried out in order to reproduce latest contamination status due to Cr(VI) by numerical analysis. Through history matching process, we obtained the optimized adsorption parameter considering decrease of Cr(VI) sorbability due to co-existence ions in groundwater and estimated total amount of Cr(VI) inflow into aquifer from contaminated source. In addition, based on reproduced latest contamination status, long-term prediction of this contamination was carried out for estimation of concentration change in groundwater and the effect of measures for pollution control by pumping. As a result, it was found that the effect of remediation of contamination due to Cr(VI) was significantly high by setting new multi pimping wells along the direction of pollution expansion in the view of decrease of health risk.