1998 Volume 40 Issue 2 Pages 105-120
Soil and groundwater pollutions are caused by infiltration of hazardous organic liquids into soil due to illegal dumpings and inappropriate storages. The object of this study is investigating the behavior of non-aqueous phase liquid (NAPL) in soil and ground water.
First, one dimensional column experiments are carried out for various NAPL with glassbeads layer as porous media. The experiment includes measuring infiltration rate and vertical distribution of NAPL and water after NAPL movement stops.
Second, capillary pressure-saturation (P-S) relations needed in the mathematical model is measured and compared with that calculated by the method of Lenhard & Parker (1988). As a result, for various NAPL, P-S relations in air-NAPL systems can be caluculated by P-S relations in air-water systems but P-S relations in air-NAPL-water systems can not be calculated in a small saturation area because of trapped NAPL. Then, an amount of residual NAPL in suspended water zone is measured and relations between residual NAPL saturation and properties of NAPL and porous media is investigated.
