STUDY ON RAINFALL INFILTRATION AND ADVECTION DISPERSION PHENOMENA IN THE MOUNTAINSIDE BY USING 3D NUMERICAL MODEL

Abstract

Illegal waste disposal is a serious problem in Japan. The discarded waste may contain harmful pollutant. It penetrates into the ground by rain and can contaminate groundwater. If the contamination of groundwater due to illegal dumping occurs at the slope, the affected area can expand. However, previous studies principally focus on urban area and flat land. This study is made to clarify factors affecting pollutants flows. Factors we focused on are hydraulic conductivity and layer thickness of the slope. To this end, we perform a 3D numerical simulation of the subsurface advection and dispersion processes in the slope under periodic rainfall.